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QSVI Series
Rotary Screw Vacuum Pump
Instruction Manual
This manual contains important safety information and should be made available to
all personnel who operate and/or maintain this product. Carefully read this manual
before attempting to operate or perform maintenance on this equipment.
Manual No. 50093-103
March 1997 Edition
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Table of Contents
Standard Warranty...........................................................................................................................1
Safety Hazard Symbols .....................................................................................................................2
Technical Data Sheets
1.) QSVI 25 .......................................................................................................................... 4
2.) QSVI 40 .......................................................................................................................... 6
3.) QSVI 50 .......................................................................................................................... 8
4.) QSVI 75 ........................................................................................................................10
5.) QSVI 100.......................................................................................................................12
6.) QSVI 200.......................................................................................................................14
Drawings
1.) QSVI 25 (air-cooled) ......................................................................................................16
2.) QSVI 25 (water-cooled)..................................................................................................17
3.) QSVI 40 (air-cooled) ......................................................................................................18
4.) QSVI 40 (water-cooled)..................................................................................................19
5.) QSVI 50 (air-cooled) ......................................................................................................20
6.) QSVI 50 (water-cooled)..................................................................................................21
7.) QSVI 75 (air-cooled) ......................................................................................................22
8.) QSVI 75 (water-cooled)..................................................................................................23
9.) QSVI 100 (air-cooled).....................................................................................................24
10.)QSVI 100 (water-cooled) ................................................................................................25
11.)QSVI 200 (air-cooled).....................................................................................................26
12.)QSVI 200 (water-cooled) ................................................................................................27
Section 1 - General
1.) Safety Precautions ..........................................................................................................28
2.) Model Identification........................................................................................................28
Section 2 - Description
1.) QSVI Vacuum Pumps.....................................................................................................30
2.) Principles of Vacuum Pump Operation ............................................................................. 30
3.) Air Flow ........................................................................................................................31
4.) Fluid Flow & Cooling System.........................................................................................31
5.) Fluid Coolers..................................................................................................................31
6.) Air/Fluid Reservoir, Element ........................................................................................... 31
7.) Vacuum Control System..................................................................................................31
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8.) Auto Dual with Modulation.............................................................................................32
9.) Auto/Demand.................................................................................................................33
10.)Electrical System............................................................................................................33
11.)Indicators and Gauges.....................................................................................................33
Section 3 - Installation
1.) Receiving.......................................................................................................................35
2.) Moving to the Ins tallation Site .........................................................................................35
3.) Location.........................................................................................................................35
4.) Piping Connections.........................................................................................................36
5.) Piping Fit-up ..................................................................................................................36
6.) Pressure Relief Valves....................................................................................................36
7.) Electrical........................................................................................................................37
8.) Pneumatic Circuit Breakers ............................................................................................. 37
9.) Guards ...........................................................................................................................37
10.)Water Piping..................................................................................................................37
11.)Cooling Water................................................................................................................37
12.)Safety Labels/Decals.......................................................................................................38
13.)Instruction Manual..........................................................................................................38
14.)Induction System............................................................................................................38
15.)Fluid Level.....................................................................................................................39
16.)Vacuum Pump Rotation..................................................................................................39
17.)Phase Monitor ................................................................................................................39
Section 4 - Procedures
1.) Prior To Starting.............................................................................................................40
2.) Starting the Vacuum Pump .............................................................................................. 40
3.) Stopping the Vacuum Pump............................................................................................41
4.) Emergency Stop .............................................................................................................42
Section 5 – Maintenance or Service Preparation
1.) Preparing for Maintenance or Service ..............................................................................43
Section 6 - Servicing
1.) Safety............................................................................................................................44
2.) Lubrication.....................................................................................................................44
3.) Fluid Specifications ........................................................................................................44
4.) Fluid Life ....................................................................................................................... 44
5.) Understanding the Analysis Report..................................................................................45
6.) Vacuum Pump Fluid Filter ..............................................................................................48
7.) Vacuum Pump Air/Fluid Separator Element.....................................................................48
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8.) Fluid Scavenging System................................................................................................48
9.) Inlet Air Filter ................................................................................................................49
10.)Vacuum Pump Shaft Fluid Seal.......................................................................................49
Section 7 – Service Adjustments
1.) Differential Pilot Valve ...................................................................................................52
2.) Vacuum Switch .............................................................................................................. 52
3.) Water Temperature Regulating Valve ..............................................................................52
4.) Coupling Alignment........................................................................................................52
5.) Water-cooled Heat Exchangers ........................................................................................ 53
Section 8 – Troubleshooting
1.) Troubleshooting..............................................................................................................55
2.) O-rings...........................................................................................................................63
Section 9 – Maintenance Schedule
1.) Maintenance Schedule ....................................................................................................68
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Standard Warranty
Quincy Compressor Division
Industrial Screw Products
QSVI Packaged Vacuum Pumps, Airends,
Remanufactured Airends and
Vacuum Pump Parts
Seller warrants products of its own manufacture against
defects in workmanship and materials under normal use
and service, as follows:
QSVI Packaged Units
Twelve (12) months from date of start-up or twenty-four
(24) months from date of shipment from the factory,
whichever occurs first.
Basic Vacuum Pump
Twenty-four (24) months from date of start-up or thirty-six
(36) months from date of shipment from the factory,
whichever occurs first.
Remanufactured Basic Vacuum Pump
One (1) year from date of shipment from factory.
Parts
Ninety (90) days from date of Distributor sale or one (1)
year from date of factory shipment, whichever occurs first.
With respect to products not manufactured by Seller,
Seller will, if practical, pass along the warranty of the
original manufacturer.
Notice of the alleged defect must be given to Seller in
writing with all identifying details including serial number,
model number, type of equipment and date of purchase,
within thirty (30) days of the discovery of same during the
warranty period.
Seller’s sole obligation on this warranty shall be, at its
option, to repair, replace or refund the purchase price of
any product or part thereof which proves to be defective.
If requested by Seller, such product or part thereof must
be promptly returned to Seller, freight collect for
inspection.
Seller warrants factory repaired or replaced parts of its
own manufacture against defects in material and
workmanship under normal use and service for ninety (90)
days or for the remainder of the warranty on the product
being repaired, whichever is longer.
This warranty shall not apply and Seller shall not be
responsible nor liable for:
(a) Consequential, collateral or special losses or
damages;
(b) Equipment conditions caused by fair wear and tear,
abnormal conditions of use, accident, neglect or
misuse of equipment, improper storage or damages
resulting during shipment;
(c) Deviation from operating instructions, specifications,
or other special terms of sales;
(d) Labor charges, loss or damage resulting from
improper operation, maintenance or repairs made by
person(s) other than Seller or Seller’s authorized
service station.
(e) Improper application of product.
In no event shall Seller be liable for any claims, whether
arising from breach of contract or warranty of claims of
negligence or negligent manufacture, in excess of the
purchase price.
THIS WARRANTY IS THE SOLE WARRANTY OF
SELLER AND ANY OTHER WARRANTIES, EXPRESS,
IMPLIED IN LAW OR IMPLIED IN FACT, INCLUDING
ANY WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR PARTICULAR USE, ARE HEREBY
SPECIFICALLY EXCLUDED.
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SAFETY HAZARD SYMBOLS
Important!
Throughout this manual we have identified key hazards. The following symbols identify
the level of hazard seriousness.
! DANGER !
Immediate hazards which will result in severe personal injury or
death.
! WARNING !
Hazards or unsafe practices that could result in personal injury or
death.
! CAUTION !
Hazards or unsafe practices that could result in minor personal injury,
product or property damage.
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! WARNING !
Read this manual and follow all instructions prior to installing or
operating this compressor.
NOTICE
These instructions, precautions and descriptions cover standard Quincy manufactured QSVI series direct drive air
compressors.
As a service to our customers, we often modify or construct packages to the customers' specifications. This
manual may not be appropriate in those cases.
NOTE:
Every effort has been taken to ensure complete and correct instructions have been included in this manual,
however, possible product updates and changes may have occurred since this printing. Quincy Compressor
reserves the right to change specifications without incurring any obligation for equipment previously or
subsequently sold. Not responsible for typographical errors.
Reference to the machine MODEL, SERIAL NUMBER and DATE OF ORIGINAL START-UP must
be made in all communication relative to parts orders or warranty claim. The model/serial number plate is
located on the vacuum pump base.
Spare Parts Ordering Information
Coltec Industries, Quincy Compressor Division maintains replacement parts for Quincy compressors. A repair
parts list is shipped with all new machines. Order parts from your Authorized Quincy distributor. Use only
genuine Quincy replacement parts. Failure to do so may void warranty.
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Technical Data Sheet - QSVI 25
General Specifications
Drive Motor ..........................................................................................................................................25 HP
Drive System........................................................................................................................................Direct
Inlet Capacity.......................................................................................................................................365 ACFM
Maximum Operating Pressure (Continuous)...................................................................................10" HgV (506 torr)
Minimum Operating Pressure (Continuous)...................................................................................29.9" HgV (0.5 torr)
Base Pressure.......................................................................................................................................29.9" HgV (0.5 torr)
Maximum Ambient Temperature.......................................................................................................110°F
Minimum Ambient Temperature .......................................................................................................35°F
Inlet Connection..................................................................................................................................4" NPT
Discharge Connection........................................................................................................................4" NPT
Rotor Diameter.....................................................................................................................................204 mm
Rotor Length........................................................................................................................................316 mm
Rotor Speed – Male ............................................................................................................................1,760 RPM
Rotor Speed – Female.........................................................................................................................1,174 RPM
Tip Speed..............................................................................................................................................18.8 meters/sec.
Intake Male Bearings..........................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Male Bearings...................................................................................................................Tapered Roller Bearings (x 3)
Intake Female Bearings.......................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Female Bearings................................................................................................................Tapered Roller Bearings (x 2)
Displacement at Operating Speed.....................................................................................................398 CFM
Volumetric Efficiency..........................................................................................................................91.7%
Electrical Data
Full Load Package BHP (Air-cooled) ................................................................................................16.2 BHP
Package Electrical Consumption – Air.............................................................................................14.4 KW
Full Load Package BHP (Water-cooled)..........................................................................................15.8 BHP
Package Electrical Consumption – Water ........................................................................................14.1 KW
Drive Motor Service Factor...............................................................................................................1.15
Drive Motor Speed..............................................................................................................................1,760 RPM
Fan Motor BHP....................................................................................................................................0.4 BHP
Specific Power - Air-cooled...............................................................................................................4.4 BHP/100
Specific Power - Water-cooled..........................................................................................................4.3 BHP/100
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Fluid System
Method of Lubrication.......................................................................................................................Pump
Fluid Flow.............................................................................................................................................5.1 GPM
Total Fluid Capacity............................................................................................................................15 Gallons
Reservoir Fluid Capacity....................................................................................................................14 Gallons
Discharge Temperature Range..........................................................................................................170 to 245°F
HAT Shutdown Temperature............................................................................................................250°F
Fluid Carryover Rate (unloaded, 29" HgV)......................................................................................2 PPM
Standard Fluid......................................................................................................................................QUINSYN
®
Air-cooled Data
Maximum Heat Rejection....................................................................................................................423 BTU/min.
Cooling Fan Static Pressure...............................................................................................................0.13" H2O
Fan Motor .............................................................................................................................................0.5 HP
Fan RPM...............................................................................................................................................3,450
Fan Flow...............................................................................................................................................800 CFM
Water-cooled Data
Water Flow – 50°F...............................................................................................................................1 gal ./min.
Water Flow – 70°F...............................................................................................................................1.5 gal ./min.
Water Flow – 90°F...............................................................................................................................2 gal ./min.
Maximum Water Temp. Rise @ 1 GPM............................................................................................50.7°F
Recommended Water Pressure .........................................................................................................40 to 100 psig
Water Pressure Drop @ Max. Flow..................................................................................................0.1 psi
Water Connections.............................................................................................................................1" NPT
Sound Level
Unenclosed – Air................................................................................................................................78 dB (A)
Unenclosed – Water...........................................................................................................................N/A
Standard Enclosure – Air...................................................................................................................71 dB (A)
Standard Enclosure – Water ..............................................................................................................N/A
Maximum Dimensions
Length ...................................................................................................................................................79"
Width....................................................................................................................................................48"
Height....................................................................................................................................................58.5"
Weight..................................................................................................................................................2,362 lbs.
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Technical Data Sheet - QSVI 40
General Specifications
Drive Motor ..........................................................................................................................................40 HP
Drive System........................................................................................................................................Direct
Inlet Capacity.......................................................................................................................................550 ACFM
Maximum Operating Pressure (Continuous)...................................................................................10" HgV (506 torr)
Minimum Operating Pressure (Continuous)...................................................................................29.9" HgV (0.5 torr)
Base Pressure.......................................................................................................................................29.9" HgV (0.5 torr)
Maximum Ambient Temperature.......................................................................................................110°F
Minimum Ambient Temperature .......................................................................................................35°F
Inlet Connection..................................................................................................................................4" NPT
Discharge Connection........................................................................................................................4" NPT
Rotor Diameter.....................................................................................................................................204 mm
Rotor Length........................................................................................................................................316 mm
Rotor Speed – Male ............................................................................................................................2,640 RPM
Rotor Speed – Female.........................................................................................................................1,760 RPM
Tip Speed..............................................................................................................................................28.2 meters/sec.
Intake Male Bearings..........................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Male Bearings...................................................................................................................Tapered Roller Bearings (x 3)
Intake Female Bearings.......................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Female Bearings................................................................................................................Tapered Roller Bearings (x 2)
Displacement at Operating Speed.....................................................................................................610 CFM
Volumetric Efficiency..........................................................................................................................90%
Electrical Data
Full Load Package BHP (Air-cooled) ................................................................................................32.9 BHP
Package Electrical Consumption – Air.............................................................................................27.7 KW
Full Load Package BHP (Water-cooled)..........................................................................................32.5 BHP
Package Electrical Consumption – Water ........................................................................................27.4 KW
Drive Motor Service Factor...............................................................................................................1.15
Drive Motor Speed..............................................................................................................................1,760 RPM
Fan Motor BHP....................................................................................................................................0.4 BHP
Specific Power - Air-cooled...............................................................................................................6 BHP/100
Specific Power - Water-cooled..........................................................................................................5.9 BHP/100
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Fluid System
Method of Lubrication.......................................................................................................................Pump
Fluid Flow.............................................................................................................................................6.5 GPM
Total Fluid Capacity............................................................................................................................15 Gallons
Reservoir Fluid Capacity....................................................................................................................14 Gallons
Discharge Temperature Range..........................................................................................................170 to 245°F
HAT Shutdown Temperature............................................................................................................250°F
Fluid Carryover Rate (unloaded, 29" HgV)......................................................................................2 PPM
Standard Fluid......................................................................................................................................QUINSYN
®
Air-cooled Data
Maximum Heat Rejection....................................................................................................................792 BTU/min.
Cooling Fan Static Pressure...............................................................................................................0.13" H2O
Fan Motor .............................................................................................................................................0.5 HP
Fan RPM...............................................................................................................................................3,450
Fan Flow...............................................................................................................................................800 CFM
Water-cooled Data
Water Flow – 50°F...............................................................................................................................1.5 gal ./min.
Water Flow – 70°F...............................................................................................................................2 gal ./min.
Water Flow – 90°F...............................................................................................................................3 gal ./min.
Maximum Water Temp. Rise @ 1 GPM............................................................................................95°F
Recommended Water Pressure .........................................................................................................40 to 100 psig
Water Pressure Drop @ Max. Flow..................................................................................................0.2 psi
Water Connections.............................................................................................................................1" NPT
Sound Level
Unenclosed – Air................................................................................................................................87 dB (A)
Unenclosed – Water...........................................................................................................................N/A
Standard Enclosure – Air...................................................................................................................80 dB (A)
Standard Enclosure – Water ..............................................................................................................N/A
Maximum Dimensions
Length ...................................................................................................................................................78"
Width....................................................................................................................................................48"
Height....................................................................................................................................................58.5"
Weight..................................................................................................................................................2,434 lbs.
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Technical Data Sheet - QSVI 50
General Specifications
Drive Motor ..........................................................................................................................................50 HP
Drive System........................................................................................................................................Direct
Inlet Capacity.......................................................................................................................................730 ACFM
Maximum Operating Pressure (Continuous)...................................................................................10" HgV (506 torr)
Minimum Operating Pressure (Continuous)...................................................................................29.9" HgV (0.5 torr)
Base Pressure.......................................................................................................................................29.9" HgV (0.5 torr)
Maximum Ambient Temperature.......................................................................................................110°F
Minimum Ambient Temperature .......................................................................................................35°F
Inlet Connection..................................................................................................................................5" NPT
Discharge Connection........................................................................................................................4" NPT
Rotor Diameter.....................................................................................................................................204 mm
Rotor Length........................................................................................................................................316 mm
Rotor Speed – Male ............................................................................................................................3,525 RPM
Rotor Speed – Female.........................................................................................................................2,350 RPM
Tip Speed..............................................................................................................................................37.6 meters/sec.
Intake Male Bearings..........................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Male Bearings...................................................................................................................Tapered Roller Bearings (x 3)
Intake Female Bearings.......................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Female Bearings................................................................................................................Tapered Roller Bearings (x 2)
Displacement at Operating Speed.....................................................................................................796 CFM
Volumetric Efficiency..........................................................................................................................91.7%
Electrical Data
Full Load Package BHP (Air-cooled) ................................................................................................49.5 BHP
Package Electrical Consumption – Air.............................................................................................41.7 KW
Full Load Package BHP (Water-cooled)..........................................................................................49.1 BHP
Package Electrical Consumption – Water ........................................................................................41.4 KW
Drive Motor Service Factor...............................................................................................................1.15
Drive Motor Speed..............................................................................................................................3,525 RPM
Fan Motor BHP....................................................................................................................................0.4 BHP
Specific Power - Air-cooled...............................................................................................................6.8 BHP/100
Specific Power - Water-cooled..........................................................................................................6.7 BHP/100
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Fluid System
Method of Lubrication.......................................................................................................................Pump
Fluid Flow.............................................................................................................................................8.7 GPM
Total Fluid Capacity............................................................................................................................15 Gallons
Reservoir Fluid Capacity....................................................................................................................14 Gallons
Discharge Temperature Range..........................................................................................................170 to 245°F
HAT Shutdown Temperature............................................................................................................250°F
Fluid Carryover Rate (unloaded, 29" HgV)......................................................................................2 PPM
Standard Fluid......................................................................................................................................QUINSYN
®
Air-cooled Data
Maximum Heat Rejection....................................................................................................................1,279 BTU/min.
Cooling Fan Static Pressure...............................................................................................................0.13" H2O
Fan Motor .............................................................................................................................................0.5 HP
Fan RPM...............................................................................................................................................1,725
Fan Flow...............................................................................................................................................1,500 CFM
Water-cooled Data
Water Flow – 50°F...............................................................................................................................3.5 gal ./min.
Water Flow – 70°F...............................................................................................................................4.5 gal ./min.
Water Flow – 90°F...............................................................................................................................9 gal ./min.
Maximum Water Temp. Rise @ 1 GPM............................................................................................153.3°F
Recommended Water Pressure .........................................................................................................40 to 100 psig
Water Pressure Drop @ Max. Flow..................................................................................................0.5 psi
Water Connections.............................................................................................................................1" NPT
Sound Level
Unenclosed – Air................................................................................................................................90 dB (A)
Unenclosed – Water...........................................................................................................................N/A
Standard Enclosure – Air...................................................................................................................82 dB (A)
Standard Enclosure – Water ..............................................................................................................N/A
Maximum Dimensions
Length ...................................................................................................................................................78"
Width....................................................................................................................................................48"
Height....................................................................................................................................................58.5"
Weight..................................................................................................................................................2,434 lbs.
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Technical Data Sheet - QSVI 75
General Specifications
Drive Motor ..........................................................................................................................................75 HP
Drive System........................................................................................................................................Direct
Inlet Capacity.......................................................................................................................................980 ACFM
Maximum Operating Pressure (Continuous)...................................................................................10" HgV (506 torr)
Minimum Operating Pressure (Continuous)...................................................................................29.9" HgV (0.5 torr)
Base Pressure.......................................................................................................................................29.9" HgV (0.5 torr)
Maximum Ambient Temperature.......................................................................................................110°F
Minimum Ambient Temperature .......................................................................................................45°F
Inlet Connection..................................................................................................................................5" NPT
Discharge Connection........................................................................................................................4" NPT
Rotor Diameter.....................................................................................................................................255 mm
Rotor Length........................................................................................................................................286 mm
Rotor Speed – Male ............................................................................................................................3,600 RPM
Rotor Speed – Female.........................................................................................................................2,400 RPM
Tip Speed..............................................................................................................................................48.1 meters/sec.
Maximum Safe Speed..........................................................................................................................5,500 RPM
Intake Male Bearings..........................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Male Bearings...................................................................................................................Tapered Roller Bearings (x 2)
Intake Female Bearings.......................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Female Bearings................................................................................................................Tapered Roller Bearings (x 2)
Displacement at Operating Speed.....................................................................................................1,132 CFM
Volumetric Efficiency..........................................................................................................................86.6%
Electrical Data
Full Load Package BHP (Air-cooled) ................................................................................................66.7 BHP
Package Electrical Consumption – Air.............................................................................................55.1 KW
Full Load Package BHP (Water-cooled)..........................................................................................64 BHP
Package Electrical Consumption – Water ........................................................................................52.9 KW
Drive Motor Service Factor...............................................................................................................1.15
Drive Motor Speed..............................................................................................................................3,600 RPM
Fan Motor BHP....................................................................................................................................2.7 BHP
Specific Power - Air-cooled...............................................................................................................6.8 BHP/100
Specific Power - Water-cooled..........................................................................................................6.5 BHP/100
Typical Standard Motor Efficiency..................................................................................................90.2%
Typical High Efficiency Motor ..........................................................................................................91%
Typical Premium Efficiency Motor...................................................................................................94.5%
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Fluid System
Method of Lubrication.......................................................................................................................Pump
Fluid Flow.............................................................................................................................................25 GPM
Total Fluid Capacity............................................................................................................................38 Gallons
Reservoir Capacity..............................................................................................................................34 Gallons
Reservoir Volume ................................................................................................................................20.8 Cubic Feet
Normal Discharge Temperature.........................................................................................................190°F
HAT Shutdown Temperature............................................................................................................250°F
Fluid Carryover Rate (unloaded) .......................................................................................................2 PPM
Standard Fluid......................................................................................................................................QUINSYN
®
Air-cooled Data
Maximum Heat Rejection....................................................................................................................2,387 BTU/min.
Cooling Fan Static Pressure...............................................................................................................0.125" wc
Fan Motor .............................................................................................................................................3 HP
Fan RPM...............................................................................................................................................1,200
Fan Flow...............................................................................................................................................10,000 CFM
Water-cooled Data
Water Flow – 50°F...............................................................................................................................5 gal ./min.
Water Flow – 70°F...............................................................................................................................7 gal ./min.
Water Flow – 90°F...............................................................................................................................12 gal ./min.
Maximum Water Temp. Rise @ 1 GPM............................................................................................57.2°F
Recommended Water Pressure .........................................................................................................100 psig
Water Pressure Drop @ Max. Flow..................................................................................................7 psi
Water Connections.............................................................................................................................1" NPT
Sound Level
Unenclosed – Air................................................................................................................................93 dB (A)
Unenclosed – Water...........................................................................................................................88 dB (A)
Standard Enclosure – Air...................................................................................................................87 dB (A)
Standard Enclosure – Water ..............................................................................................................85 dB (A)
Low Sound Enclosure.........................................................................................................................86 dB (A)
Maximum Dimensions
Length ...................................................................................................................................................96"
Width....................................................................................................................................................56"
Height....................................................................................................................................................73"
Weight..................................................................................................................................................3,975 lbs.
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Technical Data Sheet - QSVI 100
General Specifications
Drive Motor ..........................................................................................................................................100 HP
Drive System........................................................................................................................................Direct
Inlet Capacity.......................................................................................................................................1,500 ACFM
Maximum Operating Pressure (Continuous)...................................................................................10" HgV (506 torr)
Minimum Operating Pressure (Continuous)...................................................................................29.9" HgV (0.5 torr)
Base Pressure.......................................................................................................................................29.9" HgV (0.5 torr)
Maximum Ambient Temperature.......................................................................................................110°F
Minimum Ambient Temperature .......................................................................................................45°F
Inlet Connection..................................................................................................................................8" NPT
Discharge Connection........................................................................................................................6" NPT
Rotor Diameter.....................................................................................................................................255 mm
Rotor Length........................................................................................................................................434 mm
Rotor Speed – Male ............................................................................................................................3,600 RPM
Rotor Speed – Female.........................................................................................................................2,400 RPM
Tip Speed..............................................................................................................................................48.1 meters/sec.
Maximum Safe Speed..........................................................................................................................4,500 RPM
Intake Male Bearings..........................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Male Bearings...................................................................................................................Tapered Roller Bearings (x 2)
Intake Female Bearings.......................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Female Bearings................................................................................................................Tapered Roller Bearings (x 2)
Displacement at Operating Speed.....................................................................................................1,718 CFM
Volumetric Efficiency..........................................................................................................................86%
Electrical Data
Full Load Package BHP (Air-cooled) ................................................................................................93.6 BHP
Package Electrical Consumption – Air.............................................................................................76.1 KW
Full Load Package BHP (Water-cooled)..........................................................................................90.9 BHP
Package Electrical Consumption – Water ........................................................................................73.9 KW
Drive Motor Service Factor...............................................................................................................1.15
Drive Motor Speed..............................................................................................................................3,600 RPM
Fan Motor BHP....................................................................................................................................2.7 BHP
Specific Power - Air-cooled...............................................................................................................6.3 BHP/100
Specific Power - Water-cooled..........................................................................................................6.1 BHP/100
Typical Standard Motor Efficiency..................................................................................................91.7%
Typical High Efficiency Motor ..........................................................................................................92.4%
Typical Premium Efficiency Motor...................................................................................................94.5%
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Fluid System
Method of Lubrication.......................................................................................................................Pump
Fluid Flow.............................................................................................................................................42 GPM
Total Fluid Capacity............................................................................................................................45 Gallons
Reservoir Capacity..............................................................................................................................40 Gallons
Reservoir Volume ................................................................................................................................25.2 Cubic Feet
Discharge Temperature Range..........................................................................................................170 to 245°F
HAT Shutdown Temperature............................................................................................................250°F
Fluid Carryover Rate (unloaded) .......................................................................................................2 PPM
Standard Fluid......................................................................................................................................QUINSYN
®
Air-cooled Data
Maximum Heat Rejection....................................................................................................................3,183 BTU/min.
Cooling Fan Static Pressure...............................................................................................................0.125" wc
Fan Motor .............................................................................................................................................3 HP
Fan RPM...............................................................................................................................................1,200
Fan Flow...............................................................................................................................................10,000 CFM
Water-cooled Data
Water Flow – 50°F...............................................................................................................................6 gal ./min.
Water Flow – 70°F...............................................................................................................................8 gal ./min.
Water Flow – 90°F...............................................................................................................................13.3 gal ./min.
Maximum Water Temp. Rise @ 1 GPM............................................................................................63.5°F
Recommended Water Pressure .........................................................................................................100 psig
Water Pressure Drop @ Max. Flow..................................................................................................7 psi
Water Connections.............................................................................................................................1.5" NPT
Sound Level
Unenclosed – Air ...............................................................................................................................94 dB (A)
Unenclosed – Water ..........................................................................................................................89 dB (A)
Standard Enclosure – Air ..................................................................................................................88 dB (A)
Standard Enclosure – Water .............................................................................................................86 dB (A)
Low Sound Enclosure.........................................................................................................................86 dB (A)
Maximum Dimensions
Length ...................................................................................................................................................108"
Width....................................................................................................................................................60"
Height....................................................................................................................................................85"
Weight..................................................................................................................................................6,300 lbs.
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Technical Data Sheet – QSVI 200
General Specifications
Drive Motor ..........................................................................................................................................200 HP
Drive System........................................................................................................................................Direct
Inlet Capacity.......................................................................................................................................3,000 ACFM
Maximum Operating Pressure (Continuous)...................................................................................10" HgV (506 torr)
Minimum Operating Pressure (Continuous)...................................................................................29.9" HgV (0.5 torr)
Base Pressure.......................................................................................................................................29.9" HgV (0.5 torr)
Maximum Ambient Temperature.......................................................................................................110°F
Minimum Ambient Temperature .......................................................................................................45°F
Inlet Connection..................................................................................................................................8" NPT
Discharge Connection........................................................................................................................8" SAE Flange
Rotor Diameter.....................................................................................................................................321 mm
Rotor Length........................................................................................................................................546 mm
Rotor Speed – Male ............................................................................................................................3,600 RPM
Rotor Speed – Female.........................................................................................................................2,400 RPM
Tip Speed..............................................................................................................................................60.5 meters/sec.
Maximum Safe Speed..........................................................................................................................4,500 RPM
Intake Male Bearings..........................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Male Bearings...................................................................................................................Tapered Roller Bearings (x 2)
Intake Female Bearings.......................................................................................................................Cylindrical Roller Bearings (x 1)
Discharge Female Bearings................................................................................................................Tapered Roller Bearings (x 2)
Displacement at Operating Speed.....................................................................................................3,377 CFM
Volumetric Efficiency..........................................................................................................................88.8%
Electrical Data
Full Load Package BHP (Air-cooled) ................................................................................................190.7 BHP
Package Electrical Consumption – Air.............................................................................................152.3 KW
Full Load Package BHP (Water-cooled)..........................................................................................186.2 BHP
Package Electrical Consumption – Water ........................................................................................149.3 KW
Drive Motor Service Factor...............................................................................................................1.15
Drive Motor Speed..............................................................................................................................3,600 RPM
Fan Motor BHP....................................................................................................................................4.5 BHP
Specific Power - Air-cooled...............................................................................................................6.4 BHP/100
Specific Power - Water-cooled..........................................................................................................6.3 BHP/100
Typical Standard Motor Efficiency..................................................................................................93.1%
Typical High Efficiency Motor ..........................................................................................................93.6%
Typical Premium Efficiency Motor...................................................................................................94.1%
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Fluid System
Method of Lubrication.......................................................................................................................Pump
Fluid Flow.............................................................................................................................................42 GPM
Total Fluid Capacity............................................................................................................................45 Gallons
Reservoir Capacity..............................................................................................................................40 Gallons
Reservoir Volume ................................................................................................................................25.2 Cubic Feet
Discharge Temperature Range..........................................................................................................170 to 245°F
HAT Shutdown Temperature............................................................................................................250°F
Fluid Carryover Rate (unloaded) .......................................................................................................2 PPM
Standard Fluid......................................................................................................................................QUINSYN
®
Air-cooled Data
Maximum Heat Rejection....................................................................................................................3,183 BTU/min.
Cooling Fan Static Pressure...............................................................................................................0.125" wc
Fan Motor .............................................................................................................................................3 HP
Fan RPM...............................................................................................................................................1,200
Fan Flow...............................................................................................................................................10,000 CFM
Water-cooled Data
Water Flow – 50°F...............................................................................................................................6 gal ./min.
Water Flow – 70°F...............................................................................................................................8 gal ./min.
Water Flow – 90°F...............................................................................................................................13.3 gal ./min.
Maximum Water Temp. Rise @ 1 GPM............................................................................................63.5°F
Recommended Water Pressure .........................................................................................................100 psig
Water Pressure Drop @ Max. Flow..................................................................................................7 psi
Water Connections.............................................................................................................................1.5" NPT
Sound Level
Unenclosed – Air................................................................................................................................94 dB (A)
Unenclosed – Water...........................................................................................................................89 dB (A)
Standard Enclosure – Air...................................................................................................................88 dB (A)
Standard Enclosure – Water ..............................................................................................................86 dB (A)
Low Sound Enclosure.........................................................................................................................86 dB (A)
Maximum Dimensions
Length ...................................................................................................................................................108"
Width....................................................................................................................................................60"
Height....................................................................................................................................................85"
Weight..................................................................................................................................................6,300 lbs.
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QSVI 25 AIR-COOLED DIMENSIONAL DRAWING
16
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QSVI 25 WATER-COOLED DIMENSIONAL DRAWING
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QSVI 40 AIR-COOLED DIMENSIONAL DRAWING
18
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QSVI 40 WATER-COOLED DIMENSIONAL DRAWING
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QSVI 50 AIR-COOLED DIMENSIONAL DRAWING
20
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QSVI 50 WATER-COOLED DIMENSIONAL DRAWING
21
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QSVI 75 AIR-COOLED DIMENSIONAL DRAWING
22
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QSVI 75 WATER-COOLED DIMENSIONAL DRAWING
23
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QSVI 100 AIR-COOLED DIMENSIONAL DRAWING
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QSVI 100 WATER-COOLED DIMENSIONAL DRAWING
25
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QSVI 200 AIR-COOLED DIMENSIONAL DRAWING
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QSVI 200 WATER-COOLED DIMENSIONAL DRAWING
27
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Section 1
• Use the correct fluid at all times.
∗ Safety Precautions
∗ Installation Hints
Safety Precautions and Warnings
Listed are some, but not all, cautions that must be
observed with vacuum pumps and compressed air
systems. Failure to follow any of these warnings may
result in death, serious injury and property damage
and/or vacuum pump damage.
• This vacuum pump is designed for use in the
compression of normal atmospheric air only. No other
gases, vapors or fumes should be exposed to the
vacuum pump intake or processed through the vacuum
pump.
• Disconnect and lock out all power supplies to the
vacuum pump plus any remote controllers prior to
servicing the unit.
• Relieve all pressure internal to the vacuum pump prior
to servicing.
• Do not change the pressure setting of the relief valve,
restrict the function of the relief valve or replace the
relief valve with a plug. Over pressurization of system
or vacuum pump component can occur, resulting in
death, serious injury and property damage.
• Never use a flammable or toxic solvent for cleaning the
air filter or any parts.
• Do not attempt to service any part while the vacuum
pump is operating.
• Take extreme care in selecting the proper inlet
filtration system for the vacuum pump. Liquids,
solids and abrasive powders must be prevented from
entering the vacuum pump to prevent mechanical
failure or reduced life.
• Alterations must not be made to this vacuum pump
without Quincy Compressor approval. Use of parts other
than those approved by Quincy for alterations, repair or
servicing may create hazardous conditions and will void
the warranty.
Installation Hints for Vacuum Service
• The following items should be used as a guide for the
installation of QSVI vacuum pumps. The list is not
inclusive of every variable possible in the placement
of a vacuum pump. Every vacuum pump installation is
unique and cm must be exercised in the placement of
each pump. If you are unsure of any installation
variable, please consult the factory before start-up.
• Make sure all connections in piping from the pump to
the chamber or use point are leak tight and secure.
Leaks add load to the vacuum pump and decrease
both available pump capacity and attainable base
pressure.
• All piping should be as straight as possible with non-
restrictive diameters. Elbows, bends, tees, and tapers
should be used only as absolutely necessary.
• As a rule of thumb, the inlet diameter of the pump
should be maintained as far into the process as
possible. Consult the factory for piping
recommendations.
• Do not remove any guards or canopy panels while the
vacuum pump is operating.
• Observe gauges daily to ensure vacuum pump is
operating properly.
• Follow all maintenance procedures and check all safety
devices on schedule.
• Never disconnect or tamper with the high air
temperature (HAT) switch.
• Keep plumbing and system free of fluids, water, dirt,
and debris that are not part of the process. These can
cause obstructions in the vacuum flow through the
piping and can reduce available pumping capacity.
• All welds should be vacuum compatible.
• The work chamber should be clean, dry and empty of
contamination not process related.
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• The fluid in the vacuum pump is the most critical
component. Most vacuum pump failures are the result
of contaminated or deteriorated fluid. Follow
recommended fluid change schedules in normal
applications (air) and watch closely the condition and
appearance of the fluid in chemical or harsh
applications. Use the Quincy fluid analysis program
to monitor the condition of the fluid. Leak check the
system by pumping down to the lowest attainable
pressure and then valve off the vacuum pump.
Monitor the pressure rise over a period of five or ten
minutes and record this rate of rise for future
reference. This value is a good toot to have if you
believe there are pump or system problems. Compare
new value with the original.
• Inlet filtration should be installed an every pump. The
potential for particulate contamination in rough
vacuum applications is significant. The particle
micron retention of the filter element should be smaller
than the smallest possible particle load. Also, the
inlet filter should be mounted in such a way as to
prevent particulate from falling into the inlet of the
vacuum pump during cleaning or changing of the
filter element.
• Vacuum rated isolation valves should be used for
vacuum applications. Compressed air valves and
vacuum valves differ in their sealing characteristics
and compressed air valves may leak in vacuum
applications.
• In multiple pump installations, check valves should be
installed in the inlet piping. This will prevent fluid
from being drawn from an 'off' unit into an operating
unit. Check valves should be properly sized so as not
to "chatter" during operation. Spring loaded,
elastomer seated check valves are recommended.
These should be mounted in a horizontal flow
orientation.
• If there is a potential for liquids to be occasionally
drawn into the vacuum system, a receiver can and
should be used to separate these liquids from the
incoming air stream. In applications where there is
significant amounts of liquid, consult the factory.
• Vacuum gauge ports and gauges should be installed
in each log of central vacuum piping. This provides a
diagnostic tool for troubleshooting both the
application and any pump related problems.
• Be sure there is no back pressure on the exhaust line
of the vacuum pump. Vacuum pumps are not
specifically designed to compress exhaust gas above
atmospheric pressure, although they can be adapted
to do so with some modification. Significant back
pressure can overheat the pump and cause motor
overloading.
• When pumping condensable vapors and particulates,
more frequent fluid changes are required to maintain
pump life. Consult factory about types and styles of
filtration units.
• Maintain system seals on a regular basis. Tom 0-ring
and gaskets should be replaced immediately. All
flange faces should be free of dirt, lubricant, and
scratches.
• Do not use collapsible tubing to plumb the vacuum
system. Any restrictions in line diameter caused by
tube collapse will reduce available pumping capacity.
• In applications where auxiliary exhaust demisters are
used, back pressure in the reservoir should not
exceed 3 psig under normal operating conditions.
• Continuous operation from atmospheric pressure to
10" HgV in not recommended for QSVI vacuum
pumps. In this vacuum range, there is not enough
differential pressure to scavenge the separated fluid
from the separator element back to the inlet valve.
This results in high fluid carryover. There are
modifications that can be made to the vacuum pump
to partially alleviate this condition. Please consult the
factory for details. Intermittent operation in this
vacuum range is acceptable.
• Any applications involving gases or vapors other
than air should be approved by Quincy prior to startup. These gases or vapors can react with the fluid or
materials of construction of the vacuum pump and
cause premature failures.
• Any vacuum pump placed in an application with inlet
gas stream temperatures above 120° should be
approved by Quincy prior to start-up.
• Quincy QSVI Rotary Screw Vacuum Pumps, with or
without enclosures, are designed for indoor
installation only.
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Section 2 - Description
∗ QSVI Vacuum Pumps
∗ Principles of Vacuum Pump Operation
∗ Air Flow
∗ Fluid Flow & Cooling System
∗ Fluid Coolers
∗ Air/Fluid Reservoir & Air/Fluid Separator Element
∗ Auto Dual with Modulation
∗ Auto Demand – Optional
∗ Electrical System
∗ Indicators & Gauges
in anti friction bearings at both the suction and discharge
ends. The electric motor, airend and associated equipment
are mounted on a welded structural frame.
Radial loads are carried on cylindrical roller bearings on
the power or suction end of the vacuum pump. Radial and
axial loads are carried on tapered roller bearings at the
discharge end of the vacuum pump.
Fluid circulation is maintained by an external fluid pump
directly driven by the rotor.
Principles of Vacuum Pump Operation
QSVI Series Vacuum Pumps
The QSVI line of rotary screw vacuum pumps are
single stage, positive displacement, fluid flooded,
rotary screw type units. They consist essentially of two
rotors that resemble worm gears. The male rotor is direct
driven through a flexible coupling on all QSVI's except the
QSVI 40. The male rotor has four lobes that mesh with six
grooves in the female rotor. Both rotors are contained in a
rotor housing that has two parallel axis and adjoining
bores. There is an air inlet part located at the power input
end of the vacuum pump and a discharge port located at
the opposite end. Both rotors are mounted
As the rotors turn, air is drawn into the rotor housing
through the inlet port. This volume of trapped air extends
the entire length of the two rotors initially and is
prevented from escaping by the unported area of the rotor
housing wall. As rotation continues, the air at the inlet
side is carried to the discharge side and forced out the
discharge port, the discharge pipe, and into the air/fluid
reservoir where it is discharged to the atmosphere through
a fluid separator element. The compression cycle of a
rotary vacuum pump is a continuous process from intake
to discharge. The airend consists of two rotors in
constant mesh, housed in a cylinder with two parallel
adjoining bores. All parts are machined to exacting
tolerances.
Compression Cycle
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Air Flow
Air/Fluid Reservoir & Air/Fluid Separator Element
During pump operation, a vacuum is produced at the
pump inlet. Air entering flows through the air inlet valve
into the rotor housing where it is compressed, then
discharged within the air/fluid reservoir. The air
discharged from the pump contains fluid which is
separated from the air as it passes through a fluid
separator located within the air/fluid reservoir. The gas,
now at near atmospheric pressure, is exhausted through
the discharge port on the reservoir housing. The air/fluid
reservoir is equipped with a safety valve to protect the
system in the event of excessive restriction to the air flow
in the separator element or the discharge system.
Fluid Flow & Cooling System
The fluid in the system serves three functions: it lubricates
the bearings and the rotors, it seals rotor clearances to
improve efficiency, and it removes heat from the gas as the
gas is being compressed, thus lowering the discharge
temperature.
Fluid is pumped out of the air/fluid reservoir through a
fluid filter and then into the airend. In the airend, some of
the fluid is diverted directly to the bearings through
internal passages to insure positive lubrication to the
bearings, the remainder of the fluid is injected into the
early stage of the evacuation cycle to seal clearances and
lubricate the rotors.
The air/fluid reservoir serves as a fluid reservoir and
contains the air/fluid separator element. The discharge
pipe from the vacuum pump enters the reservoir at a point
below the normal fluid level and then turns upward inside
the reservoir. The air/fluid mixture is discharged into the
reservoir above the fluid level and impinges on the
underside of the separator element. The air/fluid reservoir
is provided with a fluid filler opening and fluid level gauge.
As the air/fluid mixture impinges on the bottom of the fluid
separator element, most of the fluid separates from the air
and drops to the bottom of the reservoir. The remaining
fluid, suspended in the air stream, passes through the
media of the separator element and is removed from the
discharge air stream. The fluid is then returned to the
vacuum pump by means of a scavenging line connected
from the bottom of the air/fluid separator element to the
inlet housing.
It should be noted that the separator element is sized
larger for a vacuum pump than it would be for the
equivalent displacement compressor, and only Quincy
approved separator elements should be used.
Fluid Coolers
Removal of the heat from the fluid is achieved with either
an air-cooled or a water-cooled heat exchanger. The aircooled fluid cooler is a finned tube unit. A continuous
supply of cool air is forced across the fins and tubes by a
fan mounted on a separate drive motor. Minimum fluid
injection temperature is controlled by a thermal mixing
valve which permits a controlled amount of hot fluid to mix
with the cooled fluid before entering the vacuum pump.
The water-cooled fluid cooler is of shell and tube
construction. Minimum fluid injection temperature is
controlled by a water regulating valve which senses the
fluid temperature entering the vacuum pump and regulates
the cooling water flowing through the fluid cooler.
Vacuum Control System
Assume the control system is set to operate between 20”
to 23” HgVand is in the power-off state. When the start
button on the vacuum pump is activated, two operations
occur. First, electric power is routed through normally
closed contacts on the vacuum switch to the normally
open solenoid valve causing it to shift closed. Second, the
inlet valve permits air to flow from the vacuum system to
the vacuum pump inlet where it is compressed to
atmospheric pressure and discharged through the air/fluid
reservoir.
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The control system remains in this state until the vacuum
level in the plant system increases to 20” HgV, at which
point the vacuum regulator permits more vacuum to be
applied to the inlet valve air cylinder causing it to
gradually close the inlet valve until the amount of air
permitted into the vacuum pump is equal to the amount of
air being leaked into the plant vacuum system through
use. If vacuum system usage continues to decrease
causing the level to increase to 23” HgV, the vacuum
switch trips, opening the normally closed contacts and
stopping power flow to the solenoid. This causes the
solenoid to shift to the normally open position. This
permits enough air flow (regulated by a 0.033" orifice) from
the inlet valve air cylinder through the solenoid to the
vacuum pump inlet to close the inlet valve completely and
keeps the vacuum level in the system from rising above
the maximum set point of 23”HgV.
The 0.025" orifice is sized to permit the air cylinder to open
when the vacuum signal from the vacuum regulator or
solenoid valve ceases, while still restricting air flow into
the control piping network to a level such that the vacuum
regulator remains effective during operation. The 0.033"
orifice is sized to work together with the 0.025" orifice
such that when the solenoid valve opens, only enough
vacuum is provided at the air cylinder to close it. This
enhances the responsiveness of the control system. The
0.078" orifice keeps the air cylinder from oscillating.
The vacuum pump is now running with a fully closed inlet
valve. When vacuum level in the system drops to the
lower set point, 20" HgV in this case, the switch closes,
shifting the solenoid valve to the closed position and
permitting the inlet valve to open. This cycle continues as
required by vacuum system usage, and a vacuum level of
20" to 23" HgV is maintained in the vacuum system.
If the vacuum pump stops during operation, either
manually from the panel, or automatically due to a high
temperature condition, the inlet valve will not act as a
check valve to prevent air from entering the vacuum
system through vacuum pump.
Auto Dual with Modulation
The Auto/Dual system offers two choices of controlling
the Quincy QSVI Vacuum pump. With the selector switch
in the “Continuous Run” position, the vacuum pump
operates continuously matching demand with a differential
pilot valve controlling the position of the inlet valve.
When maximum system vacuum is reached, the vacuum
switch opens, closing the inlet valve and, although the
vacuum pump continues to run, no more vacuum will be
produced. When the Auto Dual mode is selected, the
vacuum pump will also perform as above, however, a solid
state timer is activated when the vacuum switch contacts
open. This timer is adjustable within a ten (10) minute
range. When the timer reaches the end of its delay, the
vacuum pump will automatically shut down and assume a
"stand-by" mode. Upon a drop in vacuum pressure, the
vacuum switch contacts close, restarting the vacuum
pump automatically. The timer should be set, during unit
start-up, for a minimum of ten (10) minutes.
Should the plant vacuum level drop causing the vacuum
switch contacts to close during the unloaded/timing mode,
the vacuum pump will continue to operate, resetting the
timer and instructing the inlet valve to re-open.
What has been described here is the operation of the
control system over a 20" to 23 ' HgV vacuum range, with
lower set point of 20' HgV, an upper set point of 23' HgV,
and a 3' HgV differential The control system is designed to
operate with an upper set point of 10" HgV to 29.6" HgV at
sea level barometer (29.92 in. Hg).
When operation in the Auto mode allows the vacuum
pump to start and stop more than five (5) time per hour,
select the Continuous Run mode and allow the unit to
operate continuously. Excessive motor starts will shorten
motor life.
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! WARNING !
Never assume it is safe to work on the unit
because it is not operating. It may be in the
automatic stand-by mode and could restart at any
time. Follow all safety instructions in the
“Preparing for Maintenance” or “Service”
chapters.
Auto/Demand - Optional
The QSVI series vacuum pumps utilize 460V incoming
power through an across-the-line magnetic starter. A
transformer in the control panel reduces this voltage to
120 VAC for the various controls on the unit. These
controls include the selector switch, vacuum switch, timer,
high air temperature safety switch, solenoid and indicator
lights. Other incoming line voltages are available as
options. The vacuum pump is provided with a NEMA 1
enclosure. Optional enclosures include NEMA 4.
The QSVI vacuum pump with Auto/Demand controls
accommodate external control signals from an optional
Quincy Demand-A- Matic multiple vacuum pump
controller. With the selector switch in the Local mode, the
vacuum pump will operate exactly as described in the
previously mentioned Auto Dual description.
In the Remote mode, the vacuum pump’s vacuum switch is
bypassed in favor of the Demand-A- Matic multiple
vacuum pump controller. The vacuum pump will start,
draw vacuum, unload and shutdown on time delay as
determined by the Demand-A- Matic controller.
Electrical System
A wiring diagram is included in the control panel on all
Quincy QSVI vacuum pumps.
NOTE:
Due to continuing product improvements and updates, it
is suggested that the wiring diagram included in the
control panel be used when servicing the electrical
controller.
Indicators and Gauges
Main Power on Light - Indicates when power from the
main disconnect switch has been turned on and there is
live power at the vacuum pump control panel. This light
will remain on as long as there is power to the unit,
regardless of the position of the control selector switch.
! WARNING !
Always check power supply disconnect. The
Power-on light may be inoperable.
High Air Temperature Light - Indicates when the unit
has sensed an unusually high temperature in the
discharge air/fluid mixture. Unit has shut down. NEVER
turn the unit back on until the problem has been corrected.
Hourmeter - Indicates actual hours of operation. Used to
determine maintenance intervals.
Vacuum Gauge - Indicates the system vacuum in inches
of mercury (In. HgV) below atmospheric pressure
surrounding the vacuum pump.
NOTE:
Standard drive motors are open drip proof with a
maximum ambient temperature rating of 104°F. They are
not suitable for salt laden, corrosive, dirty, wet or
explosive environments.
Air Outlet Temperature Gauge - Indicates the
temperature of the air/fluid mixture as it discharges from
the vacuum pump. Normal reading is 180°F to 220°F.
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Air/Fluid Separator Differential Gauge - Indicates
pressure differential across the air/fluid separator element.
Used to determine separator element change intervals.
Fluid Level Indicator - The fluid level indicator is a sight
gauge located on the air/fluid reservoir and continually
monitors the fluid level in the air/fluid reservoir.
Vacuum Pump Fluid Filter Maintenance Indicator -
Indicates when the fluid filter element should be replaced.
When the white indicator piston moves from the green
zone into the red zone, the fluid filter should be serviced.
High Air temperature Safety Switch - A high air
temperature (HAT) switch is standard on the QSVI units.
This switch protects the unit by sensing unusually high
temperatures and shutting the unit down.
! WARNING !
Never remove, bypass or tamper with this safety
HAT switch. Failure to provide this safety
feature could cause death, serious injury and/or
property damage. If the vacuum pump is
shutting down due to high discharge
temperature, contact a qualified service
technician immediately.
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Section 3 – Installation
∗ Receiving
∗ Moving the unit to the Installation Site
∗ Location
∗ Piping Connections
∗ Safety Relief Valves
∗ Coupling Alignment – See Section 7 Adjustment
∗ Electrical
∗ Pneumatic Circuit Breakers or Velocity Fuses
∗ Guards
∗ Water Piping
∗ Cooling Water
∗ Safety Labels/Decals
∗ Instruction Manual
∗ Induction System
∗ Fluid Level
∗ Vacuum Pump Rotation
∗ Phase Monitor
Receiving
Upon receipt, immediately inspect the vacuum pump for
any damage which may have occurred in shipment. If
visible damage is found at the time of delivery, be sure a
notation is made on the freight bill by the delivering carrier
and request a damage report. If the shipment is accepted
and it is later found that the vacuum pump has been
damaged, this is classified as concealed damage. If
concealed damage is found, report it within 15 days of
delivery to the delivering carrier, who must prepare a
damage report. Itemized supporting papers are essential
to filing a claim.
Read the vacuum pump nameplate to be sure the vacuum
pump is the model and size ordered and that optionally
ordered items are included.
Moving the Unit to the Installation Site
! CAUTION !
Improper lifting may result in component system
damage or personal injury. Follow good shop
practices and safety procedures when moving the
unit.
Location
Locate the vacuum pump on a level surface that is clean,
well lit and well ventilated. Allow sufficient space (four
feet of clearance on all sides and top of the vacuum pump)
for safe and proper daily inspection and maintenance. The
entire length of the frame base must be supported. Shim
where necessary but do not use wood.
Ambient temperature should not exceed temperatures
listed on the QSVI specifications. (Failure to heed this
may result in a high air temperature shutdown.) All
models are intended for indoor installation.
Do not locate the unit where the hot exhaust air from other
vacuum pumps or heat generating equipment may be
drawn into the unit. Never restrict the flow of exhaust air
from the fluid cooler. The heated exhaust air must be
exhausted to the outside to prevent high ambient
conditions in the room. If the room is not properly
ventilated, the vacuum pump operating temperatures will
increase and cause the high temperature switch to
activate.
In high humidity areas, avoid placing the vacuum pump in
a basement or other damp locations. Control the vacuum
pump temperatures and monitor vacuum pump fluid for
signs of water contamination. Fluid and filter changes
may need to be increased in high humidity areas.
Increased operating temperatures may be required.
! NOTICE !
Removal or modification of sound insulation will
result in high sound levels which may be
hazardous to personnel.
When a forklift is used to move the unit to it's installation
site, use forklift slots provided on the side of the main
frame. Use of chains and slings should be limited to the
main frame. Do not attempt to lift the unit by attachment
to any components.
The Quincy QSVI models are essentially vibration free,
however, some customers may choose to bolt the unit to
the floor to prevent the accidental breakage of piping or
electrical connections as a result of being bumped. Only
use lag bolts to locate the unit. Do not pull the bolts
down tight as this may, under certain circumstances, place
the frame in a twist or bind causing eventual breakage of
fluid coolers, piping and reservoirs.
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! WARNING !
Under no circumstances should a vacuum pump
be installed in an area that may be exposed to
toxic, volatile or corrosive atmosphere, nor
should toxic, volatile or corrosive agents be
stored near the vacuum pump.
Piping Connections
The vacuum distribution and piping system, including the
vacuum pump and all related components, must be
designed in accordance with generally accepted
engineering practices. Improperly designed distribution
systems can cause damage to the vacuum pump. Exhaust
piping should be installed in such a manner as to not
create additional back pressure on the vacuum pump.
Also, the exhaust piping should be installed with a drip leg
to prevent condensate from falling back into the fluid
reservoir. (See figure below)
Piping Fit-up
Care must be taken to avoid assembling the piping in a
strain with the vacuum pump. Piping should line up
without having to be sprung or twisted into position.
Adequate expansion loops or bends should be installed to
prevent undue stress at the vacuum pump resulting from
the changes between hot and cold conditions. Pipe
supports should be mounted independently of the
vacuum pump and anchored, as necessary, to limit
vibration and prevent expansion strains. In no case
should the piping be of smaller size than the connection
on the vacuum pump unit.
Pressure Relief Valves
! DANGER !
Relief valves are to protect system integrity in
accordance with ANSI/ASME B19 safety
standards. Failure to provide properly sized
relief valves will result in death or serious
injury.
Recommended Exhaust Piping
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Pressure relief valves are sized to protect the system.
Never change the pressure setting or tamper with the
valve. Only the relief valve manufacturer or an approved
representative is qualified to make such a change.
Relief valves are to be placed ahead of any potential
blockage point that includes, but is not limited to, such
components as shut-off valves, heat exchangers, and
discharge silencers. Ideally, the relief valve should be
threaded directly into the pressure point it is sensing, not
connected with tubing or pipe, and pointed away from any
personnel. Always direct discharge from relief valves to a
safe area away from personnel.
Connect incoming 3-phase power to the power block
supplied inside the electrical enclosure and tighten to the
torque specified on the side of the power block. The
installation, electric motor, wiring and all electrical controls
must be in accordance with NFPA 70-1992 National
Electric Code, and all state and local codes. All electrical
work should be performed by a qualified electrician. This
unit must be grounded in accordance with applicable
codes. See control panel for the proper wiring diagram.
! WARNING !
High voltage may cause severe personal injury
or death. Disconnect all power supplies before
opening the electrical enclosure for servicing.
! CAUTION !
NEMA electrical enclosures and components
must be appropriate to the area in which they are
installed.
Guards
Electrical
Before installation, the electrical supply should be
checked for adequate wire size and transformer capacity.
During installation, a suitable fused or circuit breaker
disconnect switch should be provided. Where a 3-phase
motor is used to drive a vacuum pump, any unreasonable
voltage unbalance between the legs must be eliminated
and any low voltage corrected to prevent excessive
current draw.
All mechanical action or motion is hazardous in varying
degrees and needs to be guarded. Guarding shall comply
with OSHA Safety and Health Standards 29 CFR 1910.219
and any state or local codes.
! WARNING !
Cabinet panels and drive guards must be
fastened in place before starting the machine
and never removed before tag and lock out of the
main power supply.
Water Piping
Water piping must be of adequate size to flow the required
amount of coolant at minimum coolant head conditions,
maximum coolant temperature and maximum operating
horsepower conditions. Failure to adequately cool can
result in short life, restrictions in filter elements, reduced
heat transfer and fires.
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Cooling Water
Cooling water should be clean and cool. Scale forming or
corrosive water will shorten the life of water-cooled
coolers. If there is any doubt about the condition of the
water, have it analyzed. It may be necessary to add a water
treatment system and/or revise the cooling system. Under
some conditions the life of the water-cooled cooler can be
extended by changing to a water-cooled cooler of different
material.
Safety Labels/Decals
! CAUTION !
Removal or painting over safety labels will result
in uninformed conditions. This could result in
personal injury or property damage. Warning
signs and labels shall be provided with enough
light to read, conspicuously located and
maintained for legibility. Do not remove any
warning, caution or instructional material
attached.
Instruction Manual
!WARNING!
Provisions should be made to have the
instruction manual readily available to the
operator and maintenance personnel If, for any
reason, any part of the manual becomes illegible
or if the manual is lost, have it replaced
immediately. The instruction manual should be
periodically read to refresh one's memory-it may
prevent a serious accident.
All connections to the vacuum pump must be tight. Air
leakage into the vacuum system lessens the vacuum
pumps ability to draw down to a base level of vacuum and
increases energy consumption.
Clean Out Schematic: "L" Type Filter
Induction System
Extreme care must be taken in selecting a proper induction
filtration system for the vacuum pump. Liquids, solids,
and abrasive powders can result in short life or mechanical
failure of the bearings, erosion of the rotors, plugged fluid
filter and/or separator element, short life of the fluid seal,
corrosion of internal parts and motor overload. Use a
vibration isolator and support all piping correctly. Piping
should be at least as large as the inlet valve opening. The
piping must be leak free and absolutely clean after
fabrication.
Clean Out Schematic: "L" Type Filter
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Fluid Level
Phase Monitor
The vacuum pump is filled at the factory with the correct
amount of QUINSYN® fluid. The fluid level is monitored
by a fluid level indicator located on the side of the air/fluid
reservoir tank while in operation. Fluid level should
completely fill the sight gauge while the vacuum pump is
in operation. Should the fluid level drop, and air is seen in
the sight glass, add fluid. DO NOT OVER FILL as the
excess fluid will carry over into the discharge piping
system.
Vacuum Pump Rotation
QSVI vacuum pumps may be equipped with an optional
phase monitor device to protect against low voltage, loss
of phase to any power leg and an imbalance of incoming
power between any two legs.
The phase monitor contains a relay. The relay contacts
close when all voltages and the phase sequence are
correct. Low voltage and voltage unbalance must be
sensed for a continuous trip delay before the relay is deenergized. The trip delay is a fixed 10 seconds. The
voltage unbalance trip point is a fixed 6% and the low
voltage trip point is a fixed minus 10%. If the relay is deenergized, it will automatically re-energize upon correction
of the fault condition.
If the phase monitor relay will not energize at star-up, make
the following checks:
(1) Check all electrical connections to the phase monitor.
(2) Check, and change if required, the phase rotation of
the incoming power.
Check the leg to leg voltage of the incoming power for low
voltage condition or voltage imbalance. (This may require
power company assistance to correct.)
Vacuum pump rotation must be checked prior to start-up.
Proper rotation on the QSVI 25, 50, 75, 100 and 200 is
clockwise as viewed from facing the drive shaft. The QSVI
40 rotation is counter-clockwise as viewed from facing the
drive shaft. The power-input end of the vacuum pump is
marked with an arrow noting the proper rotation. Failure
to operate the vacuum pump in correct rotation will result
in extreme damage to the vacuum pump and warranty
coverage will be voided.
NOTE:
When service is required on the motor, contactor or
overloads it is critical that wire reconnections are
correct. Starting the vacuum pump with reverse rotation
will cause damage and void warranty.
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Section 4 - Procedures
∗ Prior to Starting
∗ Starting the Vacuum Pump
∗ Stopping the Vacuum Pump – Normal Operation
∗ Stopping the Vacuum Pump – Emergency Operation
pump. The vacuum pump and fan must rotate clockwise
when facing the vacuum pump from the shaft end on the
QSVI 25, 50, 75, 100 and 200. On QSVI 40, the rotation is
counter-clockwise.
Starting the Vacuum Pump
Prior to Starting
Before starting the unit, review Sections II and III of this
manual and be certain that all installation requirements
have been met and that the purpose and use of each of the
controls, warnings and gauges are thoroughly
understood. The following checklist shall be adhered to
before placing the vacuum pump into operation:
! WARNING !
Be sure the vacuum pump is grounded.
• Remove all loose items and tools from around the
vacuum pump installation.
• Check fluid level in the air/fluid reservoir.
• Check the fan and fan mounting for tightness.
• Manually rotate the vacuum pump through enough
revolutions to be certain there are no mechanical
interferences.
• Check all connections for tightness.
• Check to make sure all relief valves are in place.
Be sure that the exhaust line is open on the dry side of
air/fluid reservoir to ensure that no back pressure is added
to the pumping system.
Start the vacuum pump and watch for excessive vibration
or strange noises. If either is observed, stop the pump
immediately and correct. See stopping instructions.
Control System - The control system vacuum settings
are factory set, however, they should be checked at
the startup as noted previously. Following is a
discussion of checking and adjusting the vacuum
control system.
In order to make the discussion clear, certain terms need to
be understood. Range is that region of vacuum levels
desired in the system. The range has a maximum value
above which the system vacuum level should not rise, and
a minimum level below which the system vacuum level
should not fall. A typical range would be from 23" HgV
vacuum to 20" HgV vacuum. The differential for this range
is 3" HgV which is the difference between the maximum
and minimum settings of the range. Range and differential
are interchangeable. Upper set point and upper trip point
both refer to the maximum value of the range (23" HgV).
Lower set point and lower trip point both refer to the
minimum value of the range (20' HgV). The vacuum
regulator is usually set to operate at the lower set point,
and that is where it will be set if this adjustment is
followed.
• Check to make sure all panels and guards are in place
and securely mounted.
• Check fuses, circuit breakers and thermal overloads for
proper size.
• Open all manual shut-off valves (block valves) beyond
the air/fluid reservoir.
• Check the inlet filter element to see that it is securely
mounted.
After all the above conditions have been satisfied, close
the main power disconnect switch, jog the starter switch
button to check the rotational direction of the vacuum
The three items to be checked and adjusted, if necessary,
are:
1.) The vacuum switch differential 2.)
The vacuum switch range
3.) The vacuum regulator set point
In order to make these adjustments an easy means of
varying air flow into the vacuum pump is required, so that
even when the vacuum pump is running at fall capacity
the system vacuum level can be lowered below the lower
set point. If this is not possible, the plant vacuum system
must be disconnected from the vacuum pump inlet and a
hand valve screwed into the 3" pipe tap in the vacuum
pump inlet.
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! CAUTION !
Any piping, valves etc. which are attached to the
vacuum pump inlet must be clean so as to prevent
debris from entering the vacuum pump inlet and
causing damage.
Adjustments begin and proceed as follows:
vacuum switch, this will not change the differential
set in the previous steps. Tightening the nut against
the spring "I increase the range (raise the vacuum
level) or loosening the nut will decrease the range
(lower the vacuum level). It may be necessary to open
the hand inlet valve until a vacuum level below the
lower trip point (lower set point) is obtained.
1.) Check the fluid level in the air/fluid reservoir.
2.) Be certain that the discharge piping is unobstructed.
3.) Turn the regulator adjustment screw completely into
the regulator body.
4.) Open the hand valve at the vacuum pump inlet
completely.
5.) Start the vacuum pump.
6.) Gradually close the hand valve at the vacuum pump
inlet until 10" HgV is showing on the vacuum gauge
in the vacuum pump control panel.
7.) Allow the vacuum pump to come up to operating
temperature (180°F – 210°F).
8.) Continue to gradually close the inlet hand valve until
the vacuum switch trips on increasing vacuum. The
trip point is most easily detected by placing the hand
on the solenoid valve and feeling when the solenoid
valve snaps open.
9.) Without changing the hand valve setting, the vacuum
pump inlet valve should open and close as activated
by the solenoid which receives its signal from the
vacuum pressure switch. As the inlet valve opens and
closes read the maximum and minimum vacuum levels
on the vacuum gauge and figure the differential as
explained above.
10.) If the differential is to be increased, the differential
screw in the vacuum switch must be turned in and
vice versa if the differential is to be reduced. Note that
in making the differential adjustment the minimum
vacuum level point (lower set point) does not change,
only the maximum level point (upper set point). When
increasing the differential it may be necessary to
further close the inlet hand valve to maintain better
control of the cycling of the inlet valve.
Adjust the vacuum regulator as follows:
a.) Adjust the hand inlet valve to hold the lower set
point without the vacuum pump cycling.
b.) Remove the 0.078' orifice from the inlet valve air
cylinder.
c.) Carefully insert a blunt probe into the hole where
the 0.078" orifice was, being certain that the probe
can move in and out freely, and insert to a depth
where the blunt end of the probe lightly makes
contact with the diaphragm in the air cylinder.
d.) Back out the vacuum regulator adjustment screw
until the diaphragm in the air cylinder begins to
move which will be detected by the probe starting
to move in as light contact is maintained with the
diaphragm.
e.) Hold the vacuum regulator adjustment screw so
that it does not move from step "D' and tighten the
locknut on the adjustment screw.
f.) Cycle the vacuum pump above and below the lower
set point with the hand inlet valve to assure the
vacuum regulator setting is correct.
g.) Reinstall the 0.078" orifice.
12.) Observe temperature, vacuum and pressure gauges
closely for the first hour of operation and frequently
for the next seven hours. After the first eight hours,
temperature, vacuum, pressure, and general vacuum
pump operation should be monitored at least once in
every eight hour period. If any abnormal conditions
are observed, stop the vacuum pump and correct the
condition.
11.) Adjust the range in which the vacuum pump is to
operate by turning the range adjustment nut in the
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Stopping the Vacuum Pump - Normal Operation
All that is normally necessary for stopping the vacuum
pump is to push the “stop” button. It is advisable to
install a manual shutoff ahead of the inlet valve and close
it prior to turning the vacuum pump off. If for any reason
the inlet valve did not close tightly, the manual shutoff
valve would prevent fluid from being sucked back into the
vacuum system.
Stopping the Vacuum Pump - Emergency
Push the stop button or turn the power off at the main
disconnect switch or panel.
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Section 5 – Maintenance or Service
Preparation
• Per OSHA regulation 1910.147: The control of
Hazardous Energy Source (Lockout/Tagout),
disconnect and lockout the main power switch and tag
the switch of the unit being serviced.
Preparing for Maintenance or Service
! WARNING !
Never assume the vacuum pump is ready for
maintenance or service because it is stopped.
The automatic control could start the vacuum
pump at any time. Death or serious injury may
result.
The following procedure should be used for maximum
safety when preparing for maintenance or service:
• Close shut-off valve ahead of the inlet valve and after
the air/fluid reservoir (if so equipped) to prevent any air
flow through or pressure build up in the vacuum pump.
Never depend on a check valve to isolate the system.
• Manually vent the vacuum system to atmospheric
pressure.
• Shut off water and pressurization system (if water-
cooled).
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Section 6 - Servicing
Lubrication
∗ Safety
∗ Lubrication
∗ Fluid Specifications
∗ Fluid Life
∗ Understanding the Analysis Report
∗ Vacuum Pump Fluid Filter
∗ Vacuum Pump Air/Fluid Separator Element
∗ Fluid Scavenging System
∗ Inlet Air Filter
∗ Vacuum Pump Shaft Fluid Seal
∗ Preparation for New Seal Installation
∗ Seal Installation
Safety
NOTE:
Only trained and qualified technicians should perform
maintenance.
Safety procedures performed while servicing the vacuum
pump are important to both the service personnel at the
time of servicing and to those who may be around the
vacuum pump and the system it serves. Listed below are
some, but not all, procedures that should be followed:
• Wait for the unit to cool before starting service.
Temperatures at 120°F can burn the skin, some surfaces
may exceed 200°F when the vacuum pump is working.
• Clean up fluid spills immediately to prevent slipping.
• Loosen, but do not remove, flange or component
bolting, then carefully pry apart to be sure there is no
residual pressure or vacuum before removing bolting.
• Never use a flammable solvent such as gasoline or
kerosene for cleaning air filters or vacuum pump parts.
• Safety solvents are available and should be used in
accordance with their instructions.
• Improper assembly will result in damage to the vacuum
pump or injure personnel. Use the correct tools, torque
bolts to their correct value and utilize good shop
practices.
! CAUTION !
Unusual noise or vibration indicates a problem.
Do not operate the vacuum pump until the source
has been identified and corrected.
Each unit comes equipped with a fluid level gauge, a fluid
fill opening located on the side of the air/fluid reservoir
and a fluid drain located on the bottom of the reservoir.
Each unit is factory filled with QuinSyn® synthetic fluid or
QuinSyn® F (food grade) synthetic fluid.
! DANGER !
Hot fluid under pressure could cause death or
serious injury. Do not remove the fluid fill plug
and attempt to add fluid to the air/fluid reservoir
while the vacuum pump is in operation. Be sure
that the vacuum pump’s red mushroom stop
button is pushed in and locked, and that the main
power disconnect switch is in the off position and
locked out to assure that the vacuum pump will
not start automatically or by accident.
QUINSYN® fluid can be used between 1,000 and 8,000
hours depending upon the application. If the application
has gases or vapors other than dry air, consult the factory
before operation. QUINSYN F® food grade can be used
between 2,000 and 4,000 hours under good operating
conditions.
Draining of the fluid should be done while the fluid is hot
to carry away more impurities. It is strongly suggested
that Quincy's lubrication analysis be followed to establish
fluid change intervals. Fluid should be completely drained
from the reservoir and fluid cooler using drain petcocks.
Fluid Specifications
We recommend that all Quincy rotary screw vacuum
pumps be filled with QuinSyn® synthetic fluid. QuinSyn
is available from any authorized Quincy distributor. For
applications requiring a food grade fluid, we recommend
QuinSyn F®. Failure to follow the above could void your
warranty.
Fluid Life
A free service provided with the use of QuinSyn
products is a fluid analysis. This analysis provides you
with important information regarding the performance of
the fluid and in detecting any special problems that might
arise. Fluid samples should be taken at the time of fluid
filter changes, at 1,000 hour intervals or as indicated on
the analysis report. Fluid sample bottles, labels and
instructions are provided with the vacuum pump package
at the time of shipment. Additional sample bottles may be
purchased through your distributor.
®
®
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!CAUTION!
Do not mix QUINSYN® with any other fluid.
Failure to follow these recommendations will
cause severe fluid breakdown, resulting in the
formation of heavy varnish and sludge
throughout the system. This will result in
clogged fluid separators, coolers and internal
fluid passages in the vacuum pump. Warranty
will be void.
g.) SERIAL NUMBER - The unit serial number of the
Quincy vacuum pump the fluid sample was taken
from.
h.) MODEL NUMBER - The model number of the Quincy
vacuum pump that the fluid sample was taken from.
i.) HOURS ON FLUID - These are the actual hours that
the fluid has been in the unit since the last fluid
change.
Understanding the Analysis Report
Figure 6-1 is a representative of the fluid analysis report
returned after a sample has been submitted for analysis.
Figure 6-2 is a list of the parameters of the fluid tested.
a.) REPORT DATE - The date that the fluid was
analyzed.
b.) REPORT NUMBER - The assigned number to this
report.
c.) CUSTOMER ADDRESS - The name and address of
person that this report is being mailed to. This
information is being taken from the sample bottle as it
is received.
d.) CUSTOMER - The owner of the unit that sample came
from.
e.) VACUUM PUMP MANUFACTURER - Brand of
vacuum pump sample taken from.
f.) FLUID TYPE - This should always be QuinSyn® or
QuinSyn® F.
j.) HOURS ON MACHINE - This is the total hours on
the vacuum pump hourmeter.
k.) SAMPLE DATE - The date that the sample was taken
from the vacuum pump.
NOTE:
Items (c through k) are information provided by the
service person supplying the fluid for analysis.
Incomplete or incorrect information will affect the
report's accuracy.
l.) EVALUATION - This is a brief statement made by the
technician performing the actual fluid analysis. This
statement addresses the condition of the fluid and
filter. This statement will also note any problems that
need attention.
m.) PHYSICAL PROPERTIES RESULTS - Particle size is
measured in microns.
n.) SPECTROCHEMICAL ANALYSIS - See fluid
parameters.
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QUINSYN® /QUINSYN F® Specifications
Property Units ASTM-Method New Lubricant Marginal Unacceptable
Viscosity @
40°C
Antioxidant
Level
Filtration Time Minutes CPI 2-3 >15 & >25 >25
Acid Number Mg KOH/g D-974 0.1 0.8 >1.0
Phosphorus PPM Plasma Emission 0 0-40 >40
Zinc PPM Plasma Emission 0 0-40 >40
Calcium PPM Plasma Emission 0 0-40 >40
Barium PPM Plasma Emission 0 0-40 >40
Iron PPM Plasma Emission 0 5-10 >10
Copper PPM Plasma Emission 0 5-10 >10
Lead PPM Plasma Emission 0 5-10 >10
Tin PPM Plasma Emission 0 5-10 >10
Aluminum PPM Plasma Emission 0 5-10 >10
Silicon PPM Plasma Emission 0 10-15 >15
Molybdenum PPM Plasma Emission 0 0-40 >40
Water PPM Plasma Emission <50 300-400 >400
Cst D-445 42-48 38-42 or 48-52 <38 or >52
% Remaining Liquid
Chromatography
100 15 <5
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Vacuum Pump Fluid Filter
The fluid filter is a spin on, full flow unit with a high
efficiency, micro-fiberglass media. Replacement of the
filter requires spinning off the complete cartridge and
replacing it with a new one. USE GENUINE QUINCY
REPLACEMENT FILTERS ONLY.
The initial filter cartridge change should occur after the
first 100-200 hours of operation. During normal service,
the filter cartridge should be replaced under the following
conditions, whichever occurs first:
down is at 10 " HgV, this condition requires the
maximum horsepower input under strict vacuum pump
operating conditions. Cold fluid or pressure in the
discharge line from the air/fluid reservoir will result in an
overly high reading.
Failure to change the separator element before it exceeds
the pressure given above will result in blown or tripped
overload fuses and/or shortened electric motor life. The
pressure given above has nothing to do with the
collapsing point of the separator element but pertains only
to the motor overload limit.
• Every 1,000 hours.
• Every fluid change.
• After each fluid analysis sample is taken.
Vacuum Pump Air/Fluid Separator Element
The element is a one piece construction that coalesces the
fluid mist, as it passes through the filtering media, into
droplets that fall to the bottom of the separator element to
be picked up by a scavenging tube and returned to the
vacuum pump. Care must be taken in handling the
separator element to prevent it from being damaged. Any
denting may destroy the effectiveness of the filtering
media and result in excessive fluid carryover. Even a very
small hole punctured through the element will result in a
very high carryover of fluid.
The vacuum pump air/fluid separator element must be
changed for any of the following conditions, whichever
occur first:
• As indicated by the differential pressure indicator for
the separator element.
• When excessive fluid carryover is noted and it has been
determined the scavenging system is functioning
properly, the fluid temperature is normal, the running
fluid level is correct and the vacuum pump is not cycling
rapidly between load and unload.
• Every 8,000 hours.
• Any time the pressure gauge on the instrument panel
reads greater than 7 psig. Periodic checks should be
made when the fluid is up to operating temperature, the
inlet valve is full open and the system to be drawn
In an emergency, operation can temporarily be continued
with a clogged separator by restricting the inlet to the
vacuum pump. Install a hand valve in the vacuum pump
inlet downstream of the inlet filter and adjust it until the
pressure reading on the gauge is in the green. Lock the
hand valve setting in place to prevent it from being
changed. This temporary fix will permit continued
operation but will increase the length of time it takes to
draw down the system. If steps 1 or 2 above are noted the
separator element will have to be changed.
If the unit is designed for vacuum-compressor operation
and it is to be operated this way, the factory should be
consulted for the limiting pressure levels at which the
separator element should be changed.
Fluid Scavenging System
Fluid from inside the fluid separator element is returned to
the system side of the vacuum pump rotor housing by
way of a scavenger tube positioned inside the air/fluid
separator element, through a filter screen and orifice
contained in a straight fitting mounted in the top plate of
the air/fluid reservoir and through a nylon tube to the inlet
valve. Failure to keep the orifice clean will result in
excessive fluid carryover.
Cleaning of the filter screen and orifice should be
performed for any of the following conditions, which ever
occurs first:
• When no fluid is seen moving through the nylon
scavenging tube and the vacuum gauge reads between
1 to 20" HgV. The nylon tubing will also feel cool to the
touch if there is no flow through it.
• When excessive fluid carryover is detected.
• Every fluid change.
NOTE: Do not ream or change the orifice size.
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Inlet Air Filter
Vacuum Pump Shaft Fluid Seal
Servicing of the induction filtration system shall be as
recommended by the supplier of the particular system
selected for your application. The periods of servicing
should be established by checking at regular intervals
until a pattern is found. Daily maintenance is not
uncommon in many applications.
Each time a service operation is performed, inspect the
filtered side of the system, including the vacuum pump
inlet valve, for solids, dirt and/or liquids. If any is found
determine the cause and correct. If not corrected, reduced
life or complete failure of the vacuum pump and/or any of
its components can be expected. Always make certain all
gaskets , threaded connections, flange connections, and
hose or pipe connections are absolutely tight. Do not
allow particulate to fall into the inlet of the vacuum pump
when replacing the element. Most inlet filters can be
installed horizontally to prevent this.
The QSVI vacuum pump shaft seal is a scavenged triple
lipped shaft seal assembly, consisting of a wear ring, fluid
slinger, shaft seal and scavenge cavity with return line.
The wear ring rotates with the shaft, against the lips of the
seal and both parts are considered normal maintenance
items. Shaft seals must be replaced when excessive fluid
leakage is detected or when rebuilding the vacuum pump.
The original seal is warranted for 12 (twelve) months.
Shaft seals are wear items that will eventually have to be
replaced. A complete understanding of the installation
procedure and special tools are required for a successful
seal replacement. Should you decide to replace the seal
yourself, be certain to ask your Quincy distributor for the
complete illustrated instructions (available as a Service
Alert) at the time you order the seal and special tools. If
your distributor does not have a copy of these
instructions, ask him to order a copy from Quincy
Compressor Division at no charge.
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QSVI compressor units incorporate a fluid scavenge
system to complement the use of the triple lip seal
assembly. Any complaint of shaft seal leakage requires
that the scavenge system be inspected for proper
operation prior to the replacement of the shaft seal. Proper
inspection consists of the following:
1.) Check to assure that the scavenge line fitting at the
bottom of the scavenge line cavity is open and clear.
2.) Assure that the scavenge line itself is not plugged.
3.) Inspect the performance of the scavenge line check
valve for sticking. If the check valve is stuck in the
open position, lubricant can back flush from the air
end into the seal cavity and appear as a leak. If the
check valve is stuck closed the seal cavity will not
scavenge if needed.
4.) Shaft seal replacement on QSVI models require the
removal or relocation of the drive motor to allow use
of the wear sleeve removal and installation tools.
d.) Inspect the outer o-ring on the fluid slinger for
cuts or nicks.
e.) Inspect the outer o-ring on the seal adapter for
cuts and nicks.
f.) Use the tools listed in the Parts Manual for your
specific machine needs.
g.) To remove the seal wear sleeve, slide the wear
sleeve removal tool over the end of the shaft and
allow the jaws of the tool to snap on the backside
of the wear sleeve. Tighten the outer shell of the
tool down over the inner jaws. Using a ratchet
and socket, turn the puller jackscrew clockwise in
against the end of the rotor shaft.
! CAUTION !
Do not use an impact wrench with this tool.
Preparation for New Seal Installation
5.) Remove the drive coupling guards and coupling
halves. Remove the drive coupling hub and woodruff
key from the compressor shaft.
6.) Remove the four bolts and lock washers that secure
the seal adapter to the suction housing.
7.) Insert two of the seal adapter retaining bolts into the
seal adapter jack holes and tam clockwise pushing the
seal adapter away from the suction housing.
8.) After the seal adapter outer o-ring has cleared the seal
adapter bore, the adapter can be removed for
inspection. Disassemble the seal adapter for
inspection or service by taking the following steps:
a.) With the face of the seal adapter up, insert two
small, flat screwdrivers under the outer lip of the
fluid slinger and pop the slinger from the seal
adapter bore.
b.) Using a brass drift, tap the shaft seal assembly
from the seal bore.
c.) Inspect both seal lips for excessive wear or lip
flaws or damage.
1.) Inspect the rotor shaft for burrs or deep scratches at
the wear sleeve area. Using a 100-grit emery cloth,
lightly sand horizontally any rust or LOCTITE that
was between the wear sleeve and rotor shaft. Using a
fine file or emery cloth, deburr the woodruff key area
of the rotor shaft and cover the keyway with masking
tape to prevent any damage to the new seal during
installation.
2.) Clean the seal adapter with clean, fast drying solvent
Assure that the scavenge line fitting and cavity is
clean and open. Place the outer face of the seal
adapter on a flat, hard surface. Remove the new triple
lip seal from the package and inspect for damage or
imperfections on the seal lips. With the adapter sitting
on the outer face, the mechanic would be looking
down on the two lips that face the same direction
facing toward the rotor and the single lip facing the
scavenge cavity and drive motor.
3.) With the lips of the seal facing the correct direction,
apply a thin coat of LOCTITE 290® to the outer steel
case of the seal and position the seal in the seal
adapter bore. Insert the proper seal driver over the
seal. See Parts Manual for tool list for your specific
machine needs. Insert the proper wear sleeve driver in
the seal driver and tap the new seal into the bore with
a medium sized hammer.
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4.) Preheat the seal wear sleeve to 350°F in a small oven.
Do not preheat in warm oil. Apply a thin film of
LOCTITE to the inner diameter of the wear sleeve and
immediately install on the compressor shaft using the
proper wear sleeve driver. Drive the wear sleeve on
the shaft until the driver bottoms on the shaft
shoulder.
Seal Installation
4.) Using care not to damage the o-ring, evenly draw the
adapter into the bore and install the four retaining
bolts and tighten to the specified torque. Remove the
installation sleeve.
5.) Apply a thin film of compressor fluid to the o-ring and
seal lip of the outer lubricant slinger. Install the outer
slinger over the end of the rotor shaft and push into
the scavenge bore using both thumbs.
1.) Apply a thin coat of compressor fluid to the outer
face of the seal wear sleeve and seal lip.
2.) Cover the keyway in the compressor shaft with
masking tape so there is no chance of damage
occurring to the seal face during installation.
3.) Slide the proper seal installation sleeve against the
wear sleeve with the taper toward the end of the rotor
shaft. Install a new o-ring on seal adapter and
lubricate with compressor fluid. Carefully slide the
seal adapter with the new seal installed over the end
of the rotor shaft and up against the adapter bore.
6.) Reinstall the scavenge system and drive coupling.
Reinstall the coupling guards before starting the
compressor.
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Section 7 - Service Adjustments
Coupling Alignment
Differential Pilot Valve
Open a manual vent valve on the inlet to the vacuum
pump and start the unit. By manual regulation slowly close
the valve, allowing the system pressure to reach the
desired vacuum level. Adjust the screw on the bottom of
the differential pilot valve so that a slight vibration can be
detected at the point of desired system modulation. When
this vibration is felt, air is beginning to pass through the
pilot valve to the air cylinder on the inlet valve, causing
the valve to modulate toward its closed position, thereby,
reducing the volume of air being drawn in to the pump.
To raise pressure, turn the adjusting screw in (clockwise).
To lower pressure, turn the screw out (counterclockwise).
Maximum vacuum under modulation is 29.6' HgV. for the
QSVI vacuum pumps (29.9" HgV without modulation).
Vacuum Switch
The vacuum switch determines at what pressure the
vacuum pump will load and unload. Standard factory
settings are listed in the QSVI Specifications. If a lower
setting is desired, adjust the differential pilot valve first
and set the pressure switch cut-out point to no less than
2" HgV differential. That adjustment is made by turning
the wheel clockwise to increase the cut-in/cut-out
pressure and counterclockwise to lower the cut-in/cut-out
pressure. The vacuum switch should unload the vacuum
pump by the time it reaches the 20% load point.
Compressor and motor bearing life can be maximized only
when both components are in alignment to each other.
Prior to new unit start-up or after any vacuum pump or
motor change the drive alignment must be checked. If the
vacuum pump is ever accidentally knocked out of place or
relocated, the drive alignment must be checked. Note!
Some QSVI models are permanently aligned and the
above statement will not apply to those models. Check
your machine for alignment type.
Drive Coupling Specifications
Model Angular
Alignment
QSVI 75,
100 &
200
0.004 0.008 3/8" 30 ft./ lbs.
Specifications
Parallel
Element
Bolt Size
Element
Bolt
Torque
See instruction section prior to start up.
The Quincy QSVI series vacuum pumps utilize a 2
piece flexible element bolted to steel hubs on the pump
motor shafts. The following steps will insure a properly
aligned coupling:
1.) Disconnect all power to the unit. Lockout the main
power switch and hang a sign at the switch of the unit
being serviced.
2.) Remove the drive guard.
Water Temperature Regulating Valve (water-cooled
units)
The water temperature regulating valve senses fluid
temperature and opens or closes, regulating water flow
from the unit. It is factory set to maintain 160°F fluid
injection temperature as shown by the fluid inlet
temperature gauge. Due to different incoming water
temperatures and/or pressures at the customer location,
valve adjustment should be checked during start-up to
maintain 160°F fluid inlet temperature. To increase fluid
temperature, decrease water flow by turning the
adjustment screw clockwise. To decrease fluid
temperature, increase water flow by turning the adjustment
screw counterclockwise.
3.) Unbolt and remove one-half (1/2) of the flexible
element. Leave the remaining half, bolted to both steel
hubs.
4.) Using one of the existing 3/8" bolt holes in the
vacuum pump hub, screw a dial indicator mounting stud or
bolt in firmly.
5.) Attach a dial indicator to the mount with the
necessary hardware to allow the indicator plunger to
contact the motor hub.
NOTE : Four viewpoints need to be checked. Angular and
Parallel as viewed from the top. Angular and Parallel as
viewed from the side.
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Correcting Angular Misalignment (side view)
Angular Misalignment Viewed From the Top
1.) With the indicator point on the face of the motor half,
zero the indicator.
2.) Rotate the entire assembly 180° or one-half (1/2) turn.
Note the indicator reading. This reading is referred to
as "C" in the formula and example below.
3.) Measure the distance from center to center between
the motor feet. This will be referred to as "A".
4.) Measure the OD of the coupling. This will be referred
to as "B".
5.) Divide measurement "A" by measurement 'B".
6.) Multiply the result from step 5 by the indicator
reading "C" to determine the amount of shim to be
placed under either the front feet or the rear feet of the
motor to correct the misalignment.
EXAMPLE
A = 5", B = 4", C = +0.028. Because "C" is a positive
reading, the distance between the coupling halves is
greater at the top.
A/B x C = Required shims
1.) Mount the dial indicator on the compressor coupling
half so that it reads from the face of the motor
coupling half.
2.) Position the indicator on side of the coupling.
3.) Rotate the coupling halves together, 180° in the
direction of the vacuum pump rotation. The indicator
reading in this position is the amount of angular
misalignment.
4.) Loosen the motor mounting bolts and move the motor
slightly with a pry bar or soft hammer so that when
step 3 is performed, the indicator reading is within
machine specifications.
NOTE: Always recheck all measurements since one
alignment procedure may effect another.
Reinstall the other element half and torque all
mounting bolts. Before placing the unit in operation,
replace the drive guard and clear the area of all tools.
! CAUTION !
Do not operate the unit without both the coupling
halves and guards in place.
5/4 x 0.028 =0.035 shims needed
In this case, shims should go under the rear motor feet.
The formula eliminates a lot of trial and error when
determining number of shims to use.
Parallel Misalignment Viewed from the Side
1.) Mount the dial indicator on the vacuum pump
coupling half so that it will read from the outside
surface of the motor coupling half.
2.) Position the indicator at the top of the coupling.
3.) Rotate the coupling halves together, 180° in the
direction of vacuum pump rotation. The indicator
reading is twice the amount of shim which must be
added or subtracted from the motor mounts to
achieve proper alignment. Loosen the motor mounting
bolts and shim all feet an amount equal to half the
indicator reading.
NOTE : Do not lubricate capscrew threads. If capscrews
are reused, apply thread-locking adhesive. These are
special bolts, do not substitute!
Water-cooled Heat Exchangers
Most fluid/water heat exchanger problems are due to
underestimating the importance of water treatment and
heat exchanger maintenance. Efficient, long service life can
be obtained only when clean, soft and/or treated water is
used and the exchanger tubes are cleaned on a regular
basis. HEAT EXCHANGER GUARANTEES DO NOT
COVER FAILURES CAUSED BY CORROSION OR
PLUGGING.
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In many instances, the cooling water supply for the heat
exchanger will contain impurities dissolved in solution
and/or in suspension. These substances can cause scale
formations, corrosion and fouling (plugging) of any watercooled heat exchanger equipment. Disregarding the
possibility that one or more of these conditions exist may
result in increased maintenance and operation expense,
reduced equipment life and emergency shutdown. In
some cases, what is normally considered plain drinking
water can contain corrosive substances that will impact
the heat exchanger life.
Use of water-glycol mixtures will reduce heat exchange or
performance and result in increased or excessive operating
temperatures. The standard heat exchanges are sized for
water use only.
If overheating or fluid leakage to the water side develops,
remove the end caps and inspect for scale and corrosion.
If present, this is usually the source of trouble. In the case
of a closed system, the entire system, cooling tower,
cooler inlet and outlet lines should be inspected and
cleaned as necessary.
It is strongly recommended that a reputable, local water
treatment concern be engaged to establish the corrosion,
scale-forming and fouling tendency of the cooling water
and take steps necessary to remedy the situation if a
problem does exist. The need for water treatment may
only involve filtration (screening) to remove debris, sand
and/or silt in the cooling water supply. However, chemical
treatment methods may be necessary in certain instances
to inhibit corrosion and/or remove suspended solids to
alter the water's tendency to form scale deposits, or
prevent growth of microorganisms. The normal
maintenance program for the unit should include periodic
cleaning on the tube side (water side) of the heat
exchanger to remove deposits which enhance fouling and
corrosion.
Except for outright mechanical failure, the solution to most
heat exchanger problems lies at the point of use. It is the,
user's responsibility to provide the proper quality of water
and to keep the exchanger clean. No heat exchanger made
will resist plugging and corrosion if the basic rules of
clean water and regular maintenance are disregarded.
WARRANTY DOES NOT COVER HEAT EXCHANGER
FAILURE, DUE TO PLUGGING OR CORROSION.
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Section 8 – Troubleshooting
FAILURE TO START
PROBABLE CAUSE CORRECTION
Power not turned "ON" Turn the power "ON" by closing the main disconnect switch
or circuit breaker.
Blown control circuit fuse Replace fuse. Find and correct cause.
Safety circuit shutdown resulting
from high discharge air temperature
Thermal overload relays tripping Correct the cause of the overloaded condition, reset overload
Low voltage Ask the power company to make a voltage check at your
Faulty start switch Check the switch for malfunction or loose connections.
Faulty control relay Replace the relay.
Loose wire connections Check all wiring terminals for contact and tightness.
Faulty High Air Temperature Switch Check HAT switch. Contact a qualified service technician
Faulty transformer Check secondary voltage on transformer.
Correct the situation in accordance with the instruction in the
"High Discharge Air Temperature and/or High Fluid Injection
Temperature" section of this troubleshooting guide. Restart
the vacuum pump.
relay and press the start button.
entrance meter, then compare that reading to a reading taken
at the motor terminals. Use these two readings as a basis for
locating the source of low voltage.
for repairs.
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UNSCHEDULED SHUTDOWN
PROBABLE CAUSE CORRECTION
High air discharge temperature Correct the situation in accordance with the instruction in the
"High Discharge Air Temperature and/or High Fluid Injection
Temperature" section of this troubleshooting guide. Restart
the vacuum pump.
Thermal overload relays tripping Correct the cause of the overloaded condition, reset the
overload relay and press the reset button
Power failure Check the power supply to the unit.
Faulty HAT switch Contact qualified service technician.
Loose wire connections Check all wiring terminals for contact and tightness.
Faulty control relay Replace relay.
THERMAL OVERLOAD RELAYS TRIPPING
PROBABLE CAUSE CORRECTION
Excessive discharge pressure Check exhaust piping for restrictions. Check separator
element for condition.
Low voltage Check voltage and amperages while operating the unit at
full load and full pressure.
Loose overload connection Tighten mounting screws on "Thermal Overload".
Phase Fault Could be caused by low voltage, phase unbalance, or loss
of phase. This may be an intermittent problem and you may
only need to press the "Start" button to resume operation.
But if problem repeats, the power company will need to
check the incoming power.
Incorrect thermal overload relay
setting
Check motor name plate and compare to overload relay
setting.
Faulty motor Remove and have tested at motor manufacturer repair
center.
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POOR PROCESS PRESSURE
PROBABLE CAUSE CORRECTION
Leak Leak check system and compare to original rate of rise
pressure test. Look for damaged gaskets and leaks in
check/isolation valves- Check for leaks in inlet valve, and
piping to airend.
Pump is cold Allow adequate warm-up time for pump to reach operating
temperature.
Low fluid level Fill fluid reservoir to proper level.
Condensation or contamination in
Replace pump fluid.
fluid
Shaft seal leak Replace shaft seal.
Drive motor RPM too low Check and replace motor as necessary.
Excessive back pressure/separator
clogged
Temperature of system or process
gas increasing
Replace separator element-keep exhaust at atmospheric
pressure.
Increases in temperature translate into ACFM load. Keep
temperatures constant.
Vapor load being generated Possible leak in water cooling jacket or water piping in
vacuum system. Leak check.
Materials of construction Materials not compatible with vacuum service. Observe all
vacuum engineering conventions.
Clogged inlet filter Replace inlet filter element.
Inlet valve not opening fully Correct the situation in accordance with the instructions in
"Inlet Valve Not Opening or Closing in Relation to
Demand" section of the trouble-shooting guide.
Differential pilot valve not set
correctly
Readjust differential pilot valve to achieve desired
modulation range.
Vacuum switch not set correctly Readjust the vacuum switch to the desired cut-in and cut-
out pressures.
Faulty vacuum gauge Replace vacuum gauge.
Wrong fluid Replace with recommended fluid.
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POOR PUMPING SPEED (Capacity)
PROBABLE CAUSE CORRECTION
Clogged inlet filter Replace inlet filter element.
Intake line is narrow or contains
restrictions or debris
Re-plumb sections of line that are narrow or sections with
sharp turns. Maintain pump inlet diameter as far into the
process as possible. Check for obstructions in plumbing.
Problem in lubrication system Check for adequate fluid flow rate and for restrictions in
fluid piping.
Excessive back pressure/separator
clogged
Replace separator element-keep exhaust at atmospheric
pressure.
Low fluid level Fill fluid reservoir to proper level.
Condensation or contamination in
Replace pump fluid.
fluid
Pump is cold Allow adequate warm-up time for pump to reach operating
temperature.
Shaft seal leak Replace shaft seal.
Leak Leak check system and compare to original rate of rise
pressure test. Look for damaged gaskets and leaks in
check/isolation valves. Check for leaks in inlet valve, and
piping to airend.
Vapor load being generated Possible leak in water cooling jacket or water piping in
vacuum system. Leak check.
Materials of construction Materials not compatible with vacuum service. Observe all
vacuum engineering conventions.
Temperature of system or process
gas increasing
Increases in temperature translate into ACFM load. Keep
temperatures constant.
Inlet valve not opening fully Correct the situation in accordance with the instructions in
"Inlet Valve Not Opening or Closing in Relation to
Demand" section of the troubleshooting guide.
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HIGH DISCHARGE TEMPERATURE AND/OR HIGH FLUID TEMPERATURE
PROBABLE CAUSE CORRECTION
Cabinet panels removed Replace all panels, ensure all sealing surfaces and materials
are satisfactory.
Cooling water temperature is too
Check and adjust as necessary.
high
Cooling radiator is dirty Clean to ensure adequate air flow across fins.
Low fluid level Add fluid to required level on reservoir
Operating pressure is too high Rotary screw pumps are designed to operate in the 10" to
29.9" HgV range. Any operating pressure over 10" may
cause the pump to overheat.
Excessive pressure in exhaust line Clear restrictions in exhaust line to ensure atmospheric
pressure at discharge.
FREQUENT AIR/FLUID SEPARATOR CLOGGING
PROBABLE CAUSE CORRECTION
Faulty inlet filter or inadequate filter
If faulty inlet filter elements, replace them.
for the environment
Faulty fluid filter Replace fluid filter element
Fluid breakdown Correct in accordance with the instruction in “Fluid
Breakdown” section of the troubleshooting guide
Incorrect fluid separator element Use genuine Quincy replacement elements only
Extreme operating conditions such
as high vacuum pump discharge
Operate vacuum pump at recommended reservoir pressure
and air discharge temperature
temperatures, high ambient
temperature and high reservoir
pressure
Fluid contamination Change fluid. Service inlet filter element and fluid filter
promptly in accordance with the recommended maintenance
schedule.
Too high fluid level in reservoir Bring fluid level to recommended level by draining the
reservoir. Use the fluid level gauge as a guide.
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INLET VALVE NOT OPENING OR CLOSING IN RELATION TO SYSTEM DEMAND
PROBABLE CAUSE CORRECTION
Improper setting of vacuum pressure
switch or faulty switch
Improper functioning of inlet valve
piston
Adjust vacuum pressure switch to proper setting or replace
switch, if faulty.
Check piston and cylinder bore. Repair or replace as
needed.
Jammed air inlet valve assembly Check air inlet valve bushing and shaft. Check piston and
cylinder bore. Repair or replace as needed.
Faulty differential pilot valve Repair or replace as necessary.
Broken spring in air inlet valve Replace spring.
Faulty solenoid valve Repair or replace as necessary.
Faulty shuttle valve Repair or replace as necessary.
Loose wiring connections at solenoid
Check and tighten wiring terminals.
valve/pressure switch
Incorrect vacuum switch setting Adjust pressure switch to proper setting.
Faulty vacuum switch Replace switch.
Leaks in control lines Check all control line fittings and tubing.
VACUUM PUMP DOES NOT LOAD WHEN VACUUM LINE PRESSURE RISES
PROBABLE CAUSE CORRECTION
Faulty vacuum pressure switch Repair or replace as necessary.
Loose wiring connection Check and tighten wiring terminals.
Jammed air inlet valve assembly Check and repair air inlet valve.
Faulty solenoid Repair or replace as necessary.
Faulty timer Check and replace timer.
Faulty differential pilot valve Orifice plugged. Clean or replace as necessary
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VACUUM PUMP WILL NOT TIME-OUT OR SHUT DOWN WHEN UNLOADED
PROBABLE CAUSE CORRECTION
Faulty timer Check and replace as necessary.
Loose wire connections Check all wiring terminals for contact and tightness.
Leaks in control lines Check and repair leaks.
TOO RAPID CYCLING BETWEEN LOAD AND UNLOAD
PROBABLE CAUSE CORRECTION
Too small system volume Provide sufficient volume by adding additional piping or a
receiver to vacuum system. CAUTION: Volume adds time
to cyclic applications, be sure to consult with factory.
Leaks in control lines Check and repair leaks.
Faulty vacuum switch Repair or replace as necessary.
FREQUENT FLUID FILTER CLOGGING
PROBABLE CAUSE CORRECTION
Faulty indicator Replace indicator assembly.
Incorrect fluid filter Use genuine Quincy replacements only.
Faulty, incorrect or inadequate air
Replace filter element. Consult factory if necessary
filter
Fluid breakdown Correct the situation in accordance with the instructions in
"Fluid Breakdown" section of this troubleshooting guide.
System contamination Check and clean system of all dirt, corrosion and varnish.
Inadequate circulation of cooling
air at the cooler
Check the location of the cooler to make sure that there is
no restriction to free circulation of cooling air. Also check
fins at the cooler and if dust laden, clean them with air
while the machine is not running.
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UNIT OPERATING WITH HIGH DISCHARGE TEMPERATURES
PROBABLE CAUSE CORRECTION
Clogged fluid cooler Check fluid cooler for varnishing and rust deposits. If this
condition exists, clean cooler thoroughly in accordance with
recommended procedures of the heat exchanger
manufacturer.
Excessive ambient temperatures Maximum ambient for proper operation is 110°F.
Incorrect fan rotation Correct rotation with the fan pushing the air up through the
coolers.
Improper fluid Use recommended fluids only - see fluids section.
Clogged air filter Clean and replace as necessary.
Faulty thermal valve Repair or replace as necessary.
Faulty gauges Check and replace.
Airend failure Contact a Quincy authorized distributor.
EXCESSIVE FLUID CONSUMPTION
PROBABLE CAUSE CORRECTION
Too high fluid level in the receiver Bring fluid level down to the recommended level by
draining the receiver. Use the fluid level gauge as a guide.
Plugged scavenger line Clean scavenger line orifice and tube.
High fluid injection temperature Correct the situation in accordance with the instructions in
"High Discharge Air Temperature and/or High Fluid
Temperature" section of this guide.
Too high inlet pressure Operate continuously at 10" HgV and above.
Faulty or damaged separator Change air/fluid separator.
Leak in fluid lines Check for leaks and repair.
Seal failure, leaks Replace seat assembly.
Incorrect fluid Use recommended fluids only - see fluids section.
Rapid cycling Consult factory.
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FLUID SURGES INTO VACUUM LINE AFTER SHUT-DOWN
PROBABLE CAUSE CORRECTION
Inlet valve not closing properly Check and repair. Install auxiliary check valve.
Excessive exhaust pressure Check condition and resolve.
FLUID IS CLOUDY AND PUMP RUNS HOT
PROBABLE CAUSE CORRECTION
Condensable in the fluid Change fluid.
O-RING FITTINGS
Some QSVI models are equipped with some o-ring style fittings. These fittings are located at:
∗ Either end of the lubricant cooler supply and return hoses.
∗ Either end of the airend lubricant injection tube.
∗ Either end of the air/lubricant discharge tube from the airend.
! CAUTION !
Never screw o-ring style fittings into NPT pipe fittings or ports, or
screw NPT pipe nipples or fittings into ports with SAE straight threads
intended for o-ring style fittings. Severe damage to threads, leaks or
blow out will occur.
SAE Straight Thread O-ring Fitting (Adjustable)
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INSTALLATION INSTRUCTIONS
SAE Straight Thread O-Ring Fitting (Adjustable)
1. Inspect all mating surfaces for burrs, nicks, scratches or any foreign particles.
2. Lubricate O-Ring with light coat of QLTINSYN 'fluid.
3. Block lock nut until it makes contact with fitting. (See drawing below)
4. Hand tighten fitting until back-up washer contacts face of the port and is pushed all the way toward the flange. (See
drawing below)
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5. Back fitting off to desired position. Do not turn fitting more than one turn. (See drawing below)
SAE Straight Thread O-Ring Fitting (Nonadjustable)\
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Installation Instructions
1. Install SAE o-ring on port end of fitting.
2. Make sure both threads and scaling surfaces are free of burrs, nicks and scratches, or any foreign material,
3. Lubricate 0-ring with light coating of QUINSYN.
4. Tighten fitting securely to port.
NOTE:
1. For steel fittings in aluminum, cast iron, or steel housings.
2. Restrain fitting body on adjustables if necessary in installation.
SAE Straight Thread O-ring Fitting (Adjustable).
Assembly, Fitting to Port
1. Install o-ring on fitting. DO NOT nick the o-ring.
2. Inspect both mating surfaces for burrs, nicks, scratches or any foreign particles.
3. Lubricate o-ring with light coat of QUINSYN.
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4. Back off look nut as far as possible. Make sure back-up washer is not loose and is pushed up as far as possible.
5. Screw fitting. Hand tighten until back-up washer contacts faces of the port.
6. To position the fitting, unscrew by required amount, but not more than one full turn.
7. Use two wrenches, hold fitting in desired position, tighten lock nut securely.
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Section 9 - Maintenance Schedule
INTERVAL ACTION
Periodically/Daily - 8 hours maximum
Weekly Check pressure relief valve operation.
Monthly
6 months or every 1000 hours Change fluid filter and fluid strainer.
Periodically/yearly
Every two years Change cooler hoses.
Monitor all gauges and indicators for normal operation.
Check fluid level.
Observe for fluid leaks.
Observe for unusual noise or vibration.
Drain water from air/fluid reservoir.
Service inlet filter as needed (daily or weekly if extreme
conditions exist).
Clean fluid cooler fins.
Wipe entire unit down to maintain appearance.
Go over unit and check all bolts for tightness.
Change air/fluid separator element.
Change inlet filter element.
Lubricate motors.
Check safety shutdown system.
Contact a qualified serviceman.
Check pressure relief valve for pressure setting.
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Quincy Compressor Products: 217.222.7700
E-mail: info@quincycompressor.com
Website: www.quincycompressor.com
© 2008 Quincy Compressor, an EnPro Industries company
All Rights Reserved. Litho in U.S.A.
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