Goulds Pumps 3409 User Manual

Installation, Operation and Maintenance Instructions

Model 3409

Pump Safety Tips

Safety Apparel:

Insulated work gloves when handling hot bearings or using bearing heater

Heavy work gloves when handling parts with sharp edges, especially impellers

Safety glasses (with side shields) for eye protection, especially in machine shop areas

Steel-toed shoes for foot protection when handling parts, heavy tools, etc.

Other personal protective equipment to protect against hazardous/toxic fluids

Coupling Guards:

Never operate a pump without a coupling guard properly installed

Flanged Connections:

Never force piping to make a connection with a pump

Use only fasteners of the proper size and material

Ensure there are no missing fasteners

Beware of corroded or loose fasteners

Operation:

Do not operate below minimum rated flow, or with suction/discharge valves closed

Do not open vent or drain valves, or remove plugs while system is pressurized

Maintenance Safety:

Always lock out power

Ensure pump is isolated from system and pressure is relieved before disassembling pump, removing plugs, or disconnecting piping

Use proper lifting and supporting equipment to prevent serious injury

Observe proper decontamination procedures

Know and follow company safety regulations

Observe all cautions and warnings highlighted in pump

Installation, Operation and Maintenance Instructions.

IMPORTANT SAFETY REMINDER

To: Our Valued Customers

Goulds' pumps will provide safe, trouble-free service when properly installed, maintained, and operated. We have an extensive network of experienced sales and service professionals to assist in maximizing your satisfaction with our products.

Safe installation, operation, and maintenance of Goulds' equipment are an essential end user responsibility. This Instruction, Operation, and Maintenance (IOM) manual identifies specific safety risks that must be considered at all times during product life. Understanding and adhering to these safety warnings is mandatory to ensure personnel, property, and/or the environment will not be harmed. Adherence to these warnings alone, however, is not sufficient — it is anticipated that the end user will also comply with industry and corporate safety standards. Identifying and eliminating unsafe installation, operating and maintenance practices is the responsibility of all individuals involved in the installation, operation, and maintenance of industrial equipment.

Specific to pumping equipment, two significant risks bear reinforcement above and beyond normal safety precautions.

! WARNING

▲

Operation of any pumping system with a blocked suction and discharge must be avoided in all cases. Operation, even

for a brief period under these conditions, can cause superheating of enclosed pumpage and result in a violent explosion.

All necessary measures must be taken by the end user to ensure this condition is avoided.

! WARNING

▲

Pumping equipment Instruction, Operation, and Maintenance manuals clearly identify accepted methods for disassembling pumping units. These methods must be adhered to. Specifically, applying heat to impellers and/or

impeller retaining devices to aid in their removal is strictly forbidden. Trapped liquid can rapidly expand and result in a violent explosion and injury.

Please take the time to review and understand the safe installation, operation, and maintenance guidelines outlined in this manual.

3409 IOM 11/04 3

4 3409 IOM 11/04

FOREWORD

This manual provides instructions for the Installation, Operation, and Maintenance of the Goulds Pumps Model 3409 Double Suction, Horizontally Split Case Pump. This manual covers the standard product plus common options that are available. For special options, supplemental instructions are supplied.

This manual must be read and understood before installation and maintenance.

The design, materials, and workmanship incorporated in the construction of Goulds pumps make them capable of giving long, trouble-free service. The life and satisfactory service of any mechanical unit, however, is enhanced and extended by correct application, proper installation, periodic inspection, condition monitoring and careful maintenance. This instruction manual was prepared to assist operators in understanding the construction and the correct methods of installing, operating, and maintaining these pumps.

ITT Industries - Goulds Pumps shall not be liable for physical injury, damage or delays caused by a failure to observe the instructions for Installation, Operation, and Maintenance contained in this manual.

NOTE: When pumping unit is installed in a potentially explosive atmosphere, the instructions after the Ex symbol

must be followed. Personal injury and/or equipment damage may occur if these instructions are not followed. If there is any question regarding these requirements or if the equipment is to be modified, please contact a Goulds representative before proceeding.

Warranty is valid only when genuine ITT Industries - Goulds Pumps parts are used.

Use of the equipment on a service other than stated in the order will nullify the warranty, unless written approval is obtained in advance from ITT Industries - Goulds Pumps.

Supervision by an authorized ITT Industries - Goulds Pumps representative is recommended to assure proper installation.

Additional manuals can be obtained by contacting your local ITT Industries - Goulds Pumps representative or by calling 1-(800)-446-8537.

THIS MANUAL EXPLAINS

Proper Installation

Start-up Procedures

Operation Procedures

Routine Maintenance

Pump Overhaul

Troubleshooting

Ordering Spare or Repair Parts

3409 IOM 11/04 5

6 3409 IOM 11/04

PAGE

9 SAFETY

13 GENERAL INFORMATION

15 INSTALLATION

27 OPERATION

31 PREVENTIVE MAINTENANCE

SECTION

39 DISASSEMBLY & REASSEMBLY

55 APPENDICES

55 I - Instructions for Ordering Parts

57 II - Tools

59 III - Engineering Data

61 IV - Cross Sectional

63 V - Replacement Parts List

65 VI - Useful Formulas

67 VII - Field Test Report Form

3409 IOM 11/04 7

8 3409 IOM 11/04

SAFETY

DEFINITIONS......................................9

GENERAL PRECAUTIONS .............................10

EXPLOSION PREVENTION .............................10

SPECIAL ATEX CONSIDERATIONS........................10

ATEX IDENTIFICATION ..............................11

INTENDED USE ....................................11

CONDITION MONITORING ............................11

DEFINITIONS

This pump has been designed for safe and reliable operation when properly used and maintained in accordance with instructions contained in this manual. A pump is a pressure containing device with rotating parts that can be hazardous. Operators and maintenance personnel must realize this and follow safety measures. ITT Industries - Goulds Pumps shall not be liable for physical injury, damage or delays caused by a failure to observe the instructions in this manual.

Throughout this manual the words WARNING, CAUTION, ELECTRICAL, ATEX and NOTE are used to indicate procedures or situations which require special operator attention:

! WARNING

WARNING is used to indicate the presence of a hazard which can cause severe personal injury, death, or substantial property damage if the warning is ignored.

CAUTION

CAUTION is used to indicate the presence of a hazard which will or can cause minor personal injury or property damage if the warning is ignored.

EXAMPLES

! WARNING

Pump shall never be operated without coupling guard installed correctly.

CAUTION

Throttling flow from the suction side may cause cavitation and pump damage.

Improper impeller adjustment could cause contact

between the rotating and stationary parts, resulting in a spark and heat generation.

Lock out driver power to prevent electric shock,

accidental start-up and physical injury.

NOTE: Proper alignment is essential for long pump life.

If equipment is to be installed in a potentially

explosive atmosphere and these procedures are not followed, personal injury or equipment damage from an explosion may result.

Particular care must be taken when the electrical

power source to the equipment is energized.

NOTE: Operating procedure, condition, etc. which is essential to observe.

3409 IOM 11/04 9

GENERAL PRECAUTIONS

! WARNING

Personal injuries will result if procedures outlined in this manual are not followed.

NEVER operate pump without coupling

AD AD AD

guard correctly installed.

NEVER operate pump beyond the rated conditions to which the pump was sold.

NEVER start pump without proper prime (sufficient liquid in pump casing).

NEVER run pump below recommended minimum flow or when dry.

ALWAYS lock out power to the driver

A AD

before performing pump maintenance. NEVER operate pump without safety

devices installed. NEVER operate pump with discharge

valve closed. NEVER operate pump with suction valve

closed. DO NOT change conditions of service

without approval of an authorized Goulds representative.

! WARNING

If pump is to be used on process fluids above 120° F, pump surface temperatures could be warm enough to cause burns. We recommend pump surfaces be insulated. Failure to follow these instructions could result in severe personal injury.

EXPLOSION PREVENTION

In order to reduce the possibility of accidental explosions in atmospheres containing explosive gases and/or dust, the

instructions under the ATEX symbol must be closely followed. ATEX certification is a specification enforced in Europe for non- electrical and electrical equipment installed in Europe. The usefulness of the ATEX requirements is not limited to Europe. They are useful guidelines for equipment installed in any potentially explosive environment.

SPECIAL ATEX CONSIDERATIONS

All installation and operation instructions in this manual must be strictly adhered to. In addition, care must be taken to ensure that the equipment is properly maintained. This includes but is not limited to:

1. Monitoring the pump frame and liquid end temperature.

2. Maintaining proper bearing lubrication.

3. Ensuring that the pump is operated in the intended hydraulic range.

10 3409 IOM 11/04

ATEX IDENTIFICATION

For a pumping unit (pump, seal, coupling, motor and pump accessories) to be certified for use in an ATEX classified environment, the proper ATEX identification must be present.

The ATEX tag would be secured to the pump or the baseplate on which it is mounted. A typical tag would look like this:

The CE and the Ex designate the ATEX compliance. The code directly below these symbols reads as follows:

II = 2= G/D = T4 =

Group 2

Category 2

Gas and Dust present

Temperature class, can be T1 to T6

(see Table 1)

Table 1

Max

Max permissible

surface

temperature

Code

T1 842 (450) 700 (372) T2 572 (300) 530 (277) T3 392 (200) 350 (177) T4 275 (135) 235 (113) T5 212 (100) Option not

T6 185 (85) Option not

The code classification marked on the equipment should be in accordance with the specified area where the equipment will be installed. If it is not, please contact your ITT/Goulds representative before proceeding.

F(oC)

permissible

liquid

temperature

F(oC)

available

INTENDED USE

The ATEX conformance is only applicable when the pump unit is operated within its intended use. All instructions within this manual must be followed at all times. Operating, installing or maintaining the pump unit in any way that is not covered in this manual can cause serious personal injury or damage to the

CONDITION MONITORING

For additional safety precautions, and where noted

in this manual, condition monitoring devices should be used. This includes, but is not limited to:

Pressure gauges

Flow meters

Level indicators

Motor load readings

Temperature detectors

Bearing monitors

Leak detectors

PumpSmart control system

equipment. This includes any modification to the equipment or use of parts not provided by ITT/Goulds. If there is any question regarding the intended use of the equipment, please contact an ITT/Goulds representative before proceeding.

For assistance in selecting the proper instrumentation and its use, please contact your ITT/Goulds representative.

3409 IOM 11/04 11

12 3409 IOM 11/04

GENERAL INFORMATION

PUMP DESCRIPTION ................................13

NAMEPLATE INFORMATION ...........................14

PUMP DESCRIPTION

This product line consists of 12 sizes of double suction, horizontally split case pumps from size 6x10-22 through size 14x18-28.

Casing - The casing shall be close-grained Cast Iron or Ductile Iron, and shall be of axially-split double-volute design with suction and discharge flanges and mounting feet cast integral with the lower half casing. Tapped and plugged holes shall be provided for priming, vent, drain and gauge connections. Upper half casing shall be removable without disturbing suction or discharge piping. Flanges shall be of (125/125#) (125/250#) (250/250#) ASA Standard. Suction and Discharge shall be on a common centerline in both the horizontal and vertical planes.

Impeller - The impeller shall be of the enclosed double-suction type made of (bronze) (ductile iron) (316 stainless steel) and statically and hydraulically balanced. The impeller shall be keyed to the shaft and positioned axially by the shaft sleeves. Hub shall have sufficient metal thickness to allow machining for installation of impeller rings.

Shaft - The shaft shall be made of (AISI 4140, 316 stainless steel, 17-4 ph) and be of ample size to operate under load with of minimum deflection.

Shaft Sleeves - The shaft sleeves shall be made of (bronze) (420 hardened stainless steel) [packing only] (316 stainless steel)(cast iron) and shall protect the shaft from wear and from contact with the pumped liquid. An O-ring shall be furnished under sleeve to prevent leakage.

Stuffing Box - The stuffing box shall consist of at least six (6) rings of die formed, graphite acrylic yarn packing and a split type gland to permit removal and access to packing. Ample space shall be provided for repacking the stuffing box. Arrangement shall provide for field or factory conversion to mechanical seals without machine work.

Casing Rings - The casing rings shall be made of (bronze) (cast iron) (Nitronic 60 stainless steel) and shall be installed with an anti-rotation device.

Bearings - The bearings shall be grease lubricated or oil lubricated. The inboard or coupling end bearing shall be a single row ball bearing. The outboard bearing shall be a double row cylindrical roller bearing which is retained by bearing locknut and lockwasher.

Bearing Housings - The bearing housings shall be bolted to the end of the lower half casing and shall assure positive alignment of the rotating element. The housings shall provide a fit for the inboard bearing that allows freedom for thermal expansion while the outboard bearing shall be clamped in place to take all thrust loads and keep the rotating element in its proper axial location.

Baseplate - The baseplate shall be sufficiently rigid to support the pump and driver and shall be steel with a drip pan beneath the pump end. The drip pan shall contain a tapped drain connection.

Coupling - Coupling shall be an all metal type.

The coupling used in an ATEX classified

environment must be properly certified.

Coupling Guard - The coupling guard shall be all metal.

The coupling guard used in an ATEX classified

environment must be constructed from a nonsparking material.

Rotation - Pump shall have clockwise or counterclockwise

rotation when viewed from its driven end.

3409 IOM 11/04 13

NAMEPLATE INFORMATION

Every pump has a Goulds Pumps nameplate that provides information about the pump. The nameplate is located on the pump casing.

Special tags which provide additional information (mechanical seal data, etc.) and special tagging required by customers are located on the pump casing or on the bearing frame.

The standard nameplate (Fig. 1) provides information about the pump size, type, serial number, rated head, capacity, speed, impeller diameter, model number, and maximum field hydrostatic test pressure.

The identification No. is a number which the end user of the pump requests to be put on the nameplate to identify the pump in his operation.

The year indicates the year in which the pump was built.

Rating and hydrostatic test pressure are expressed in English units. Note the format of pump size: Discharge x Suction - Nominal Impeller Diameter in inches, for example, 6x10-22.

The frame plate provides information concerning the bearings and their lubrication. The inboard and outboard bearing numbers refer to the bearing manufacturer’s numbers.

When ordering spare parts you will need to identify pump model, size, serial number, and the catalog number of required parts. Pump information can be taken from the Goulds Pumps nameplate. Catalog numbers can be found in this manual.

Fig. 1

If applicable, your pump unit may have the following ATEX tag affixed to the pump and/or baseplate. See the Safety section for a description of the symbols and codes.

14 3409 IOM 11/04

INSTALLATION

RECEIVING THE PUMP ...............................15

LIFTING THE PUMP .................................15

Horizontal ......................................15

Vertical .......................................16

STORAGE .......................................17

Temporary ......................................17

Long Term ......................................17

LOCATION.......................................18

FOUNDATION .....................................18

SETTING THE BASEPLATE ............................18

Grouting Procedure .................................19

ALIGNMENT PROCEDURE.............................19

Method One .....................................20

Method Two .....................................20

DOWELING ......................................21

SUCTION AND DISCHARGE PIPING .......................21

Suction Piping ....................................22

Discharge Piping...................................23

Pressure Gauges ...................................23

STUFFING BOX LUBRICATION ..........................24

Packing .......................................24

Mechanical Seals ..................................24

Cartridge Seals....................................25

Cyclone Separators .................................25

RECEIVING THE PUMP

Check pump for shortages and damage immediately upon arrival (an absolute must!). Prompt reporting to the carrier’s agent, with notations made on the freight bill, will expedite satisfactory adjustment by the carrier.

Pumps and drivers are normally shipped from the factory mounted on a baseplate. Couplings may either be completely assembled or have the coupling hubs mounted

LIFTING THE PUMP

The following instructions are for the safe lifting of your pump.

The unit should be unloaded and handled by lifting equally at four or more points on the baseplate. The lugs on the upper half casing are designed for lifting the upper half casing only.

on the shafts and the connecting members removed. When the connecting members are removed, they will be packaged in a separate container and shipped with the pump or attached to the baseplate.

HORIZONTAL

Bare Pump

1. Using a nylon sling, chain, or wire rope, hitch around

both bearing housings. (See Fig. 2)

3409 IOM 11/04 15

DO NOT LIFT ENTIRE PUMP WITH THESE LUGS.

Fig. 2

Pump, Base, and Driver

2. Care must be taken to size equipment for unbalanced loads which may exist if the driver is not mounted on the base at the time of lifting. Driver may or may not be mounted at the factory.

Using ANSI/OSHA Standard “S” hooks, place the “S” hooks in the holes provided in the four corners of the base. Be sure the points of the hooks do not touch the bottom of the pump base. Attach nylon slings, chains, or wire rope to the “S” hooks. Size the equipment for the load so the lift angle will be less than 45° from the vertical.

Bases supplied without lifting holes

Place one sling around the outboard bearing housing.

! WARNING

Do not use lugs on top half of casing.

Place the remaining sling around the back end of the driver as close to the mounting feet as possible. Make certain sling will not damage housing cover or conduit boxes.

Join the free ends of the slings together and place over the lifting hook. Use extreme care when positioning sling under the driver so it cannot slip off. (See Fig. 4)

3. Pump, base, and driver assemblies where the base length exceeds 100 inches may not be safe to lift as a complete assembly. Damage to the baseplate may occur. If the driver has been mounted on the baseplate at the factory, it is safe to lift the entire assembly. If driver has not been mounted at the factory and the overall baseplate length exceeds 100 inches, do not lift entire assembly consisting of pump, base, and driver. Instead, lift the pump and baseplate to its final location without the driver. Then mount the driver.

Bases supplied with lifting holes

Large bases are supplied with lifting holes in the sides or the ends of the base. (See Fig. 3)

Fig. 4

VERTICAL

Half Pedestal

1. Place nylon sling chain or wire rope around both flanges. Use a latch hook or standard shackle and end loops.

Be sure the lifting equipment is of sufficient length to keep the lift angle less than 30° from the vertical. (See Fig. 5)

Full Pedestal

2. Install eyebolts in the three holes provided at the top of the support, being sure to tighten securely. Attach chain or wire rope using latch hook or standard shackle and end loop.

Be sure to use shoulder eyebolts that are manufactured per ANSI B18.15 and sized to fit the holes provided.

Be sure lifting equipment is of sufficient length to keep the lift angle less than 30° from the vertical. (See Fig. 6)

Fig. 3

16 3409 IOM 11/04

Fig. 5

STORAGE

Fig. 6

The following storage procedures apply to the pump only. Other accessories such as motors, steam turbines, gears, etc., must be handled per the respective manufacturer’s recommendations.

TEMPORARY

Temporary storage is considered one month or less. If the pump is not to be installed and operated soon after arrival, store it in a clean, dry place having slow, moderate changes in ambient temperature. Rotate the shaft periodically to coat the bearings with lubricant and to retard oxidation, corrosion, and to reduce the possibility of false brinelling of the bearings. Shaft extensions and other exposed machine surfaces should be coated with an easily removable rust preventative such as Ashland Oil Tectyl No. 502C.

For oil lubricated bearings, fill the frame completely with oil. Before putting equipment into operation, drain the oil and refill to proper level.

LONG TERM

Storage longer than one month is considered long term storage. Follow the same procedure for temporary storage with the following addition. Add one half ounce of a corrosion inhibiting concentrated oil such as Cortec Corp. VCI-329 (for both grease and oil lubricated bearings). Seal all vents and apply a water proof tape around the oil seals in the bearing frame. Remember for oil lubricated bearings to drain the oil from the frame and refill to the proper level before running pump.

3409 IOM 11/04 17

LOCATION

The pump should be installed as near the suction supply as possible, with the shortest and most direct suction pipe practical. The total dynamic suction lift (static lift plus friction losses in suction line) should not exceed the limits for which the pump was sold.

The pump must be primed before starting. Whenever possible, the pump should be located below the fluid level to facilitate priming and assure a steady flow of liquid. This condition provides a positive suction head on the pump. It is also possible to prime the pump by pressurizing the suction vessel.

Pumps must be fully primed at all times during

operation.

When installing the pump, consider its location in relation to the system to assure that sufficient Net Positive Suction Head (NPSHA) is available at the pump inlet connection. Available NPSH must always equal or exceed the required NPSH (NPSHR) of the pump.

FOUNDATION

The foundation must be substantial enough to absorb vibration. (Hydraulic Institute Standards recommends the foundation weigh at least five [5] times the weight of the pump unit.) It must form a permanent and rigid support for the baseplate. This is important in maintaining the alignment of a flexibly coupled unit.

The pump should be installed with sufficient accessibility for inspection and maintenance. A clear space with ample head room should be allowed for the use of an overhead crane or hoist sufficiently strong to lift the unit.

NOTE: Allow sufficient space to be able to dismantle pump without disturbing the pump inlet and discharge piping.

Select a dry place above the floor level wherever possible. Take care to prevent pump from freezing during cold weather when not in operation. Should the possibility of freezing exist during a shut-down period, the pump should be completely drained, and all passages and pockets where liquid might collect should be blown out with compressed air.

Make sure there is a suitable power source available for the pump driver. If motor driven, the electrical characteristics of the power source should be identical to those shown on motor data plate.

The foundation should be poured to within .75" - 1.5" of the finished height. (See Fig. 7) Freshly poured foundations should be allowed to cure for several days before the unit is set in place and grouted.

Foundation bolts of the proper size should be embedded in the concrete to a depth of eight (8) to twelve (12) inches and locked with either a hook around a reinforcing bar or alternatively, a nut and washer at the bottom. The bolts should have a sleeve around them at least six (6) times the bolt diameter in length and at least two (2) bolt sizes larger in I.D. If a nut and washer are used for locking, the washer should have an O.D. two (2) sizes larger than the sleeve. Foundation bolts should be sized .125" less than the anchor bolt holes in the base.

SETTING THE BASEPLATE

Pump units are checked at the factory for align ability to required tolerances.

Due to flexibility of an ungrouted base and handling in shipment, it should not be assumed that the unit is in alignment when it is placed on the rough foundation.

If these directions are followed, the required alignment should be readily achieved.

Fig. 7

Initial or rough alignment must be done prior to grouting of baseplate. Rough alignment is designated as .020" TIR (Total Indicator Reading) parallel alignment and .009" TIR per inch of radius angular alignment (See ALIGNMENT PROCEDURE). Use blocks at anchor bolts and midway between to position bottom of base at finished height (See Fig. 8) with foundation bolts extending through holes in the baseplate. Metal wedges with a small taper may be used in lieu of blocks and shims.

18 3409 IOM 11/04

Fig. 8

If the unit has a non-flexible coupling (e.g. Falk Gear coupling), the coupling halves should be disconnected; this is generally not necessary on flexible type couplings (e.g. Wood’s Sure-Flex coupling).

NOTE: The baseplate does not have to be level.

After foundation bolts are lightly torqued, recheck alignment requirements once more. Follow requirements outlined at the beginning of this section. If alignment must be corrected, add or remove shims or wedges under the baseplate.

The unit can then be grouted. (See Fig. 8)

Grout compensates for the uneven foundation. Together with the baseplate, it makes a very rigid interface between the pump and the foundation distributing the weight over the length of the base and preventing shifting.

Use an approved, non-shrinking grout such as Embeco 636 or 885 by Master Builders, Cleveland, Ohio or equivalent.

GROUTING PROCEDURE

1. Build a strong form around the foundation to contain the grout.

Tighten up all pump and motor bolts to assure they have not loosened or a “soft foot” has occurred due to base distortion in shipment. A “soft foot” causes a change in the alignment when unloosening one bolt.

If the driver is being field installed, it should be centered in its bolt holes with shims added to bring the driver into rough alignment with the pump. (The pump may have to be moved also.)

Do not exceed six (6) shims, using as thick a shim as possible, otherwise “sponginess” or “soft foot” will result. Place thin shims in between thick shims.

Level and plumb the pump shaft, coupling faces and flanges by adding or removing shims between the blocks and the bottom of the base. Hand tighten the anchor bolt nuts at first. Being very careful not to distort the base, snug down the nuts with a wrench. The non-flexible coupling should not be reconnected until the alignment operation has been completed.

!CAUTION

ALIGNMENT PROCEDURE

2. Soak the top of the foundation thoroughly, then remove surface water.

3. The baseplate should be completely filled with grout and, if necessary, temporarily use air relief tubing or drill vent holes to remove trapped air.

4. After the grout has thoroughly hardened (approximately 24 hours), tighten the foundation bolts fully.

5. Check the alignment after the foundation bolts are tightened.

6. Approximately fourteen (14) days after the grout has been poured and the grout has thoroughly dried, apply an oil base paint to the exposed edges of the grout to prevent air and moisture from coming in contact with the grout.

Alignment procedures must be followed to prevent

unintended contact of rotating parts. Follow coupling manufacturer's installation and operation procedures.

Proper rough alignment must be made during unit setting and grouting. See previous section.

There are two forms of misalignment between the pump shaft and the driver shaft as follows:

1. Angular misalignment — shafts have axis concentric at intersection, but not parallel.

3409 IOM 11/04 19

2. Parallel offset misalignment — shafts have axis parallel, but offset.

The necessary tools for checking alignment are: (1) a straight edge and a taper gauge or set of feeler gauges or, (2) a dial indicator with mounting magnet and extension bars.

Check and correct for angular misalignment before correcting parallel alignment. Final alignment should be made by moving and shimming the motor on its base until the coupling hubs are within the recommended tolerances measured in total run out. All measurements should be taken with the pump and driver

bolts tightened. Final alignment check should be made after the unit has attained its final operating temperature.

Method 1 - Using straight edge and taper gauges or feelers (Fig. 9):

Proceed with this method only if satisfied that face and outside diameters of the coupling halves are square and concentric with the coupling bores. If this condition does not exist or elastomeric couplings do not make this method convenient, use Method 2.

Check for angular alignment by inserting the taper or feeler

gauges between the coupling faces at 90° intervals. The unit is in angular alignment when these four (4) measurements are the same, or within recommended tolerances.

Check for parallel alignment by placing a straight edge across both coupling rims on all four sides. The unit is in parallel alignment when the straight edge rests evenly across both coupling rims in all four (4) positions.

Method 2 - Dial Indicators (Fig. 10):

A dial indicator can be used to attain more accurate alignment.

Fasten the indicator stand or magnetic base to the pump half of the coupling and adjust the assembly until the indicator button is resting on the other half coupling periphery.

Set the dial to zero and chalk mark the coupling half where the button rests. Also place a separator between the coupling halves so bearing slack does not affect the readings. (Chalk and separators are not necessary on the elastomeric couplings that have not been disconnected.) Rotate both shafts by the same amount; i.e., all readings must be made with the button on the chalk mark.

The dial readings will indicate whether the driver has to be raised, lowered or moved to either side. Accurate alignment of shaft centers can be obtained with this method even where faces or outside diameters of the coupling are not square or concentric with the bores. After each adjustment, recheck both parallel and angular alignments.

Fig. 9

NOTE: Gross deviations in squareness or concentricity may cause rotation unbalance problems and if so must be corrected.

PERMISSIBLE COUPLING MISALIGNMENT

Parallel

Angular

Single Element

Coupling

.004” TIR

(4 mils)

.004” TIR per inch

of radius.

Double Element

(spacer) Coupling

.060” TIR

per foot of spacer

length

.002” TIR

per inch of radius

20 3409 IOM 11/04

DOWELING

Fig. 10

Pump units may, if desired, (or required in specification) be doweled on diagonally opposite feet. This should not be

SUCTION AND DISCHARGE PIPING

Flange loads from the piping system, including those

from thermal expansion of the piping, must not exceed the limits of the pump. Casing deformation can result in contact with rotating parts which can result in excess heat generation, sparks and premature failure.

The introduction of pumpage into a piping system which is not well designed or adjusted may cause strain on the pump, leading to misalignment or even impeller rubbing. Since slight strain may go unnoticed, final alignment should be done with the system full and up to final temperature.

Pipe flanges should not impose any strain on the pump. This can be checked by a dial indicator. Any strain must be corrected by adjustments in the piping system.

When installing the pump piping, be sure to observe the following precautions:

done until the unit has been run for a sufficient length of time and alignment is within the above alignment tolerance.

to prevent pipe strain. Do not install expansion joints next to the pump or in any way that would cause a strain on the pump resulting from system pressure changes. When using rubber expansion joints, follow the recommendations of the Technical

Handbook on Rubber Expansion Joints and Flexible Pipe Connectors. It is usually advisable to increase the size of both

suction and discharge pipes at the pump connections to decrease the loss of head from friction.

Install piping as straight as possible, avoiding unnecessary bends. Where necessary, use 45° or long radius 90° fittings to decrease friction losses.

Make sure that all piping joints are air-tight.

Where flanged joints are used, assure that inside diameters match properly.

Remove burrs and sharp edges when making up joints.

Piping should always be run to the pump.

Do not move the pump to pipe. This could make final alignment impossible.

Both the suction and discharge piping should be independently anchored near the pump and properly aligned so that no strain is transmitted to the pump when the flange bolts are tightened. Use pipe hangers or other supports at necessary intervals to provide support. When expansion joints are used in the piping system they must be installed beyond the piping supports closest to the pump. Tie bolts and spacer sleeves should be used with expansion joints

3409 IOM 11/04 21

Fig. 11

+ 47 hidden pages

Goulds Pumps 3409 User Manual

Pump Safety Tips

IMPORTANT SAFETY REMINDER

TABLE OF CONTENTS

SAFETY

GENERAL INFORMATION

INSTALLATION