Milton Roy mROY B, mROY A User Manual

mRO

Y® A & B

Metering Pump IOM Manual

Manual No : 54649 Rev. : 03 Rev. Date : 5/2019

Original Version

PRECAUTIONS

The following precautions should be taken when working with metering pumps. Please read this section carefully prior to installation.

Protective Clothing

ALWAYS wear OSHA approved protective clothing, face shield, safety glasses and gloves when working on or near your metering pump. Additional precautions should be taken depending on the solution being pumped. Refer to Safety Data Sheets (SDS) for the solution being pumped.

Hearing Protection

It is recommended that hearing protection be used if the pump is in an environment where the time weighted average sound level (TWA) of 85 dbA is exceeded.

Electrical Safety (Lock-out / Tag-out)

• Remove power and ensure that it remains off while maintaining pump.

• DO NOT FORGET TO CONNECT THE PUMP TO EARTH

• Electric protection of the motor (Thermal protection or by means of fuses) is to correspond to the rated current indicated on the motor data plate.

Liquid Compatibility

Verify if the materials of construction of the wetted components of your pump are recommended for the solution (chemical) to be pumped.

Pumps Water “Primed”

All pumps are tested with water at the factory. If your process solution is not approved with

water, ush the Pump Head Assembly with an appropriate solution before introducing the

process solution.

Plumbing and Electrical Connections

Always adhere to your local plumbing and electrical codes.

Line Depressurization

To reduce the risk of chemical contact during disassembly or maintenance, the suction and discharge lines should be depressurized before servicing.

Over Pressure Protection

To ensure safe operation of the system it is recommended that some type of safety/pressure relief valve be installed to protect the piping and other system components from damage due to over-pressure.

3Installation, Operations & Maintenance Manual

Lifting

This manual should be used as a guide only - Follow your company’s recommended lifting procedures. It is not intended to replace or take precedence over recommendations, policies and procedures judged as safe due to the local environment than what is contained herein. Use lifting equipment that is rated for the weight of the equipment to be lifted.

The personnel responsible for installing, operating and maintaining this equipment must become acquainted with, assimilate and comply with the contents of this manual in order to:

• Avoid any possible risk to themselves or to third parties,

• Ensure the reliability of the equipment,

• Avoid any error or pollution due to incorrect operation.

Any servicing on this equipment must be carried out when it is stopped. Any accidental startup must be prevented (either by locking the switch or removing the fuse on the power supply line).

A notice must be attached to the location of the switch to warn that servicing is being carried out on the equipment.

During oil changing operations, the waste oil must be collected in a suitable receptacle. Any

overow of oil which may result must be removed using a degreasing agent suitable for the

operating conditions.

Soiled cleaning cloths must be stored in suitable receptacles. The oil, degreasing agent and cleaning cloths must be stored in accordance with the rules on pollution.

Switch off the power supply as soon as any fault is detected during operation, such as over heating or unusual noise.

Special care has to be taken for chemicals used in the process (acids, bases, oxiding/reducing solutions, etc).

4 Installation, Operations & Maintenance Manual

TABLE OF CONTENTS

SECTION 1 - GENERAL DESCRIPTION.................................................................................. 8

1.1 INTRODUCTION ......................................................................................... 8

1.2 GENERAL INFORMATION ................................................................................ 8

1.3 PUMP CHARACTERISTICS .............................................................................. . . 8

1.4 PUMP PERFORMANCE ................................................................................... 8

1.5 PRINCIPLE OF OPERATION ............................................................................... 8

1.6 GENERAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.7 MODEL CODE (Figure 4) ................................................................................11

1.8 RPM KITS (Figure 5) .....................................................................................13

1.9 CAPACITY PRESSURE TABLE (Figure 6) ...................................................................14

SECTION 2 - INSTALLATION .........................................................................................17

2.1 UNPACKING/INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.2 STORAGE ..............................................................................................17

2.3 SAFETY PRECAUTIONS..................................................................................18

2.4 PUMP MOUNTING & LIFTING/LOCATION.................................................................18

2.5 OUTDOOR INSTALLATIONS .............................................................................18

2.6 FLANGE MOUNTED MOTORS............................................................................20

2.7 ELECTRICAL CONNECTIONS.............................................................................20

2.8 MOTORS ..............................................................................................20

2.9 PUMP LUBRICATION ....................................................................................20

2.10 PIPING ..............................................................................................21

2.11 OPERATION WITH SUCTION LIFT .......................................................................23

SECTION 3 - OPERATION ............................................................................................24

3.1 INITIAL START-UP .......................................................................................24

3.2 RESETTING THE RELIEF VALVE ...........................................................................25

3.3 OPERATION ............................................................................................26

SECTION 4 - MAINTENANCE .........................................................................................27

4.1 SPARE PARTS ...........................................................................................27

4.2 RPM KIT COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.3 RETURNING UNITS TO THE FACTORY.....................................................................27

4.4 ROUTINE MAINTENANCE ...............................................................................28

4.5 SEMI ANNUAL OIL CHANGE .............................................................................28

4.6 CHECK VALVE CARTRIDGES .............................................................................28

4.7 DIAPHRAGM(S).........................................................................................28

4.8 RELIEF VALVE POPPET...................................................................................29

4.9 CORRECTIVE MAINTENANCE ............................................................................29

4.9.1 Check Valve Cartridge Replacement ..................................................................29

4.9.1.1 Metallic Liquid Ends (Figures 19, 20, 21 & 24).........................................................29

4.9.1.2 mRoy A Plastic Liquid End, Current Design (Figure 19) ................................................30

4.9.1.3 mRoy B Plastic Liquid End (Figure 24) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.9.2 Relief Valve Poppet Replacement (Figure 18)...........................................................31

4.9.3 Diaphragm Replacement (Figures 19-26) ..............................................................31

4.9.4 Motor and Worm Replacement (Figures 17 & 18) .......................................................32

5Installation, Operations & Maintenance Manual

4.9.5 Control Spool O-Rings Replacement (Figure 17, 19 & 20) ...............................................32

4.9.6 Worm Gear Replacement (Figure 17) ..................................................................33

4.9.7 Connecting Rod and Plunger Replacement (Figure 17).................................................33

4.9.8 HEAD BOT TORQUE PATTERN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

SECTION 5 - TROUBLESHOOTING GUIDE.............................................................................35

SECTION 6 - PARTS .................................................................................................37

6.1 GENERAL ..............................................................................................37

6.2 ILLUSTRATED PARTS LIST................................................................................37

6.3 BASIC PARTS LIST FOR DRIVE MODELS mRoy A (FIGURES 17 &18) .........................................46

6.4 PARTS COMMON TO LIQUID END MODELS mRoy A (FIGURES 19 & 20)....................................48

6.5 DIAPHRAGM HEAD DESIGN E & F LIQUID ENDS - 8 BOLT (5” WITH HOLES) LIQUID END MODEL mRoy A

(FIGURE 20) .............................................................................................49

6.6 DIAPHRAGM HEAD DESIGN C & D LIQUID ENDS - 8 BOLT (2-7/8”) LIQUID END MODEL mRoy H & T

(FIGURE 20) ............................................................................................49

6.8 MODEL HIGH VISCOSITY SUCTION CHECK VALVE PARTS (FIGURE 19) ......................................50

6.9 MODEL MRA PLASTIC LIQUID END PARTS(C, D, E, & F) (FIGURE 19 ) .......................................51

6.10 mRoy A MOTOR MOUNT PARTS (FIGURES 17 & 18)......................................................53

6.11 ELECTRONIC CAPACITY CONTROL MOUNTING (FIGURE 23) .............................................57

6.12 PNEUMATIC CAPACITY CONTROL (3-15 PSI DIRECT) (FIGURE 23) ........................................58

6.13 SIMPLEX LEAK DETECTION PARTS (FIGURE 22)..........................................................58

6.14 DOUBLE DIAPHRAGM PARTS (FIGURE 22) ..............................................................60

6.15 BASIC PARTS LIST FOR DRIVE MODELS mRoy B (FIGURES 17 & 18) .......................................64

6.16 LIQUID END mRoy B - LARGE HEAD LIQUID ENDS (FIGURE 24) ..........................................65

6.17 LIQUID END mRoy B - SMALL HEAD LIQUID END (FIGURE 24)............................................66

6.18 MODEL mRoy B12 & M12 PLASTIC LIQUID END PARTS (FIGURE 24) ......................................67

6.19 mRoy B MOTOR MOUNTS (FIGURES 17 & 18) ...........................................................68

6.20 ELECTRONIC CAPACITY CONTROL MOUNTING (FIGURE 23) .............................................70

6.21 SIMPLEX LEAK DETECTOR PARTS- GAUGE & NEMA SWITCH (FIGURE 25) .................................71

6.22 DOUBLE DIAPHRAGM PARTS FOR METALLIC LIQUID END (FIGURE 26) ...................................72

6.23 DOUBLE DIAPHRAGM PARTS- WITH CONDUCTIVITY PROBE

FOR PLASTIC LIQUID END (mRoy B) (FIGURE 26).........................................................73

6 Installation, Operations & Maintenance Manual

LIST OF ILLUSTRATIONS

FIGURE 1. Pump Operation With By-Pass Port Open ...................................................................9

FIGURE 2. Pump Operation With By-Pass Port Closed ................................................................10

FIGURE 3. mRoy C, D, E & F Model Code..............................................................................11

FIGURE 4. mRoy C, D, E & F Model Code..............................................................................12

FIGURE 5. mRoy A/B Routine Maintenance Kit List, By Model Code ...................................................13

FIGURE 6. mRoy A - Metalllic Liquid Ends Capacity / Pressure Table ...................................................14

FIGURE 7. mRoy B - Metallic Liquid Ends Capacity/Pressure Table .....................................................14

FIGURE 8. mRoy A - Plastic Liquid Ends Capacity / Pressure Table .....................................................15

FIGURE 9. mRoy B - Plastic Liquid Ends Capacity / Pressure Table .....................................................16

FIGURE 11. mRoy Pump (All Models) Capacity Derating Table ........................................................16

FIGURE 14. Mounting Bolt Holes ....................................................................................19

FIGURE 15. Typical Piping and Instrumentation Diagram .............................................................22

FIGURE 16. Diaphragm Head Bolt Torque Pattern ....................................................................34

FIGURE 17. Common Parts - mRoy A & B Side View and API Motor Mount ............................................38

FIGURE 18. Common Parts - mRoy A & B End View and mRoy A Close Coupled Motor Mount ..........................39

FIGURE 19. mRoy A Metallic and Plastic Liquid End...................................................................40

FIGURE 20. mRoy A Metallic Low Pressure and High Pressure Liquid End ..............................................41

FIGURE 21. mRoy A Bar Stock Liquid End ............................................................................42

FIGURE 22. mRoy A Double Diaphragm and Leak Detection..........................................................43

FIGURE 23. mRoy A and B Actuator ..................................................................................45

FIGURE 24. mRoy B Metallic and Plastic Liquid End ..................................................................62

FIGURE 25. mRoy B Leak Detection With Switch and Gauge ..........................................................63

FIGURE 26. mRoy B Double Diaphragm..............................................................................63

7Installation, Operations & Maintenance Manual

SECTION 1 - GENERAL DESCRIPTION

1.1 INTRODUCTION

The mRoy pump is a highly reliable controlled volume pump of hydraulically actuated diaphragm design. The family of MRA & MRB frame pumps are further broken down into Model Codes. For ease of discussion, this manual will refer to either frame

size as MRA and MRB rather than the specic

Model Code.The product codes for the MRA & MRB are given in Figures 3 and 4. Historical Model Codes prior to 1995 found in Appendix A.

1.2 GENERAL INFORMATION

Pump capacity is adjustable while the pump is running or stopped. Capacity adjustment can be made manually or automatically by a signal from remote control instruments.

Repetitive accuracy of the metered discharge volume is maintained within a ±1% range at constant conditions of pressure, temperature and pump capacity adjustment setting.

The mRoy pump is a reliable, compact, controlled volume diaphragm pump for normal corrosive or toxic chemicals and light slurries with viscosities up to 200 S.S.U. (40 CPS). For higher viscosities, the mRoy ”V” option available to 12,200 CPS.

A plunger, reciprocating at a xed stroke, displaces a xed volume of hydraulic liquid, which actuates a exible, chemically inert PTFE diaphragm to create

pumping action. Double ball check valves are used on the suction and discharge to insure consistent metering accuracy. Capacity control is established by adjusting the volume of hydraulic liquid, which bypasses the diaphragm cavity.

Metering with repetitive accuracy is possible only if the volume of the hydraulic oil in the displacement chamber is maintained constant for each stroke. This is accomplished by mechanically opening the displacement chamber to the oil reservoir for a short period at the end of every suction stroke and the beginning of each pressure stroke. During

this period air or vapor is bled from the system, lost oil is replenished, and allowances are made for the expansion or contraction of the oil due to temperature change. For more information, refer to Principle of Operation.

1.3 PUMP CHARACTERISTICS

For a general description of the mRoy pump you have purchased, compare the model number and product code printed on the pump’s data plate shown in Figure 3 to the appropriate model number and product code shown in Figures 4 through 6 and Figure 13.

1.4 PUMP PERFORMANCE

The charts in Figures 8 through 10 show the performance ranges for all mRoy A & B pumps. If appropriate, refer also to the derating table shown in Figure 11.

1.5 PRINCIPLE OF OPERATION

Pumping action is developed and controlled by four basic components as follows (Figures 1 & 2)

1. The pump plunger “A” reciprocates with a constant stroke length and displaces oil into and out of the diaphragm chamber “C”.

2. The exible diaphragm “X” is a movable partition

between the plunger oil and liquid being pumped.

3. An oil bypass circuit from the diaphragm chamber “C” to the reservoir “D” through passage “E” bypass port “H” and control spool valve “F.”

4. A bypass control plunger “G” which moves with and is directly coupled to the pump plunger to correlate bypass shut off at port “H” to pump plunger position.

In operation, as the pump plunger and bypass control plunger move forward as shown in Figure 1, the displaced oil is bypassed to the oil reservoir until the control plunger “G” closes the

8 Installation, Operations & Maintenance Manual

SECTION 1 - GENERAL DESCRIPTION

bypass port “H” as shown in Figure 2. Then the balance of the plunger displacement is imposed on

the exible diaphragm that moves and displaces

the liquid being pumped through the discharge ball checks.

On the suction stroke, the pump plunger pulls oil out of the diaphragm cavity, which moves the

exible diaphragm and pulls liquid through the

suction ball checks. When the control plunger “G” opens the bypass port “H” the balance of the plunger oil displacement can be supplied from the reservoir through the bypass passages. The discharge capacity is adjusted from 0–100% by rotating the adjustment knob that moves the control spool valve “F” so that the bypass port “H” is closed at the desired percentage of the total plunger stroke. When the control spool valve is adjusted to 100% capacity, the bypass port will be positioned so that it is opened at the very end of the suction stroke. Then on the pressure stroke, the bypass port is immediately closed so the entire

plunger displacement is imposed upon the exible

diaphragm.

With the control spool valve adjusted for 50% capacity, the bypass port will be positioned so that it is opened when the plungers have completed one-half of the suction stroke. On the next pressure stroke, the oil displaced by the pump plunger will be bypassed through the open port to the reservoir

for the rst 50% of the stroke, before the by-pass

port is closed by the control plunger. The remaining 50% of the plunger displacement will then be

imposed on the exible diaphragm so that liquid

is discharged for only 50% of the plunger travel. A similar analysis would apply for 0% capacity setting on the control spool valve where all the plunger oil displacement is bypassed to the reservoir.

1.6 GENERAL SPECIFICATIONS

Figure 1. Pump Operation With By-Pass Port Open

9Installation, Operations & Maintenance Manual

SECTION 1 - GENERAL DESCRIPTION

Figure 2. Pump Operation With By-Pass Port Closed

Accuracy

±1% steady state accuracy over 10:1 turndown

Drive

Hydraulic bypass design allows adjustment from 0 to 100% of rated capacity while stopped or running

Liquid End

High performance check valves

Diaphragm

Hydraulically actuated Diaphragm provides 96000 hours of long life in comparison with Mechanically actuated Diaphragm (15000 to 20000 hours).

Relief Valve

Adjustable internal relief valve

Capacity Control

Micrometer ...............................................standard

Electronic ....................4–20 mA

Pneumatic ....................3–15 psi

Stroke Length

Models mRoy C, D, E, F............. 0.7” (1.78 cm)

Models mRoy K, L, R ...................... 1.5” (3.81 cm)

10 Installation, Operations & Maintenance Manual

What key features drive product sizing Features that drive every build

Standard mRoy A & B Pump Model Code

MRA 1 1 C 48 A1 A N N V N N N

End Item # Heads Mat ’l Plg Dia

MRA 1 Dup L/R Dup L/R

MRB 2 A-B A-B

10 20 30 40 50 60 70 80 90 100 110 120

Gear

Rao

77 C - CC N

48 A - API Y

Mat’l

1 316L SS 24

2 PVC 19 Diaphragm Rupture Detecon

5 Alloy 20 15 N None

6 Hast C 12.5

7 PVDF 9.5 4 Pressure type w/gauge & NEMA 4 Switch

8 Fluoride 8 5 Pressure type w/gauge & Ex Prf Switch

Plg Dia

C 3/8” (9.5 mm) 9 Pressure type w/pressure transmier

D 7/16” (11.1 mm)

E 5/8” (15.9 mm) Capacity Control

F 1 1/16” (27 mm) N Aluminum (std)

K 19/32” (15.1 mm) S Stainless Steel

L 7/8 “ (22.2 mm) L SS Locking (API)

R 1 7/16” (36.5 mm)

Motor Mount Only - Special motor F ECC Ex Prf 115V

S5 NEMA 56C G ECC Ex Prf 220V

S1 NEMA 143TC/145TC M ECC Mount Only

S7 IEC 71 P Pneumac

S8 IEC 80 3 Rotork NEMA 4 w/ com

S9 IEC 90 4 Rotork XP w/ com

38 M* - META V (VSD)

Motor

Motor mount

Sucon

Conn

Dischrge

Conn

O Ring

Material

Control

Dia

Cap

Rupture

Detect

6 Double Dia with intermed uid no probe

7 Double Dia w/ intermed uid & conduct probe

ECC NEMA 4 115V

B ECC NEMA 4 220V

C ECC NEMA 4 115V - Asia

Connecons D ECC NEMA 4 220V - Asia

Threaded - metal

P NPT

H BSPP - Horizontal O Ring Opons

V BSPP - Vercal (discharge only) N Standard

Threaded - plasc E EPDM

P NPT T Te ex

4 BSPP

Flanged - Metal

A ANSI 1/2 Class 150 RF Thd

B ANSI 1/2 Class 300 RF Thd

C ANSI 1/2 Class 600 RF Thd

D ANSI 1/2 Class 150 RF Skt wld

E ANSI 1/2 Class 300 RF Skt wld

F ANSI 1/2 Class 600 RF Skt wld

G ANSI 1/2 Class 150 RF/ SF Weld Neck

J ANSI 1/2 Class 300 RF / SF Weld Neck

K ANSI 1/2 Class 600 RF / SF Weld Neck

L ANSI 1/2 Class 1500 RF / SF Weld Neck

M EN 1759-1 DN15 Class150 TYPE B1 / 11

N EN 1092-1 DN15 PN40 TYPE B1 / 11

Q EN 1759-1 DN15 Class300 TYPE B1 / 11

R EN 1759-1 DN15 Class600 TYPE B1 / 11

S EN 1759-1 DN15 Class1500 TYPE B1 / 11

Flanged - Plasc

1 ANSI 1/2 Class 150 RF Thd

2 ANSI 1/2 class 150 Plasc Slvnt wld

Base

Pressure type w/gauge only

Figure 3. Global MRA/MRB Model Code

11Installation, Operations & Maintenance Manual

Extended mRoy A & B Opons

Appears along with Common opt code if any value is not “N”

N N N N N N N N

10 20 30 40 50 60 70 80

LE Opon

LE Opons

N None

V High viscosity

S Slurry

D Degas

E Europe source parts

G G7 weed parts

C NACE MR175

Temperature Opons

N Standard, 20F to 190F (-7 to 88C)

1 Low ambient, -40 to 20F (-40 to -7C)

2 High, 190 to 300F (88 to 149C)

3 Temp control jacket

Drive Opons

N Standard

H High sucon pressure

S Sand protect design

M Marine design Component Tests

R Retrot base EMEA N None

Motor Opons 2 PMI and Hydro Combinaon

N No 3 Hydrostac test 1.5 x max rang - head only

Y Yes 4 Hydrostac Test & Cercate

V Variable freq drive 5 Witnessed Hydrostac Test & Cercate

C Motor w/ VFD 6 Dye penetrant for welds only

Lubricaon Opons

N Standard

4 Food Grade Oil N Standard RAL 1018

5 High performance synthec A Paint 160 µ RAL 1018

9 Ship without oil B Food Grade Paint - RAL 9010

Low temp non synthec (15 to

Temp

50F) Coang Systems

Less Common Opon Extension

Drive op-

ons

Motor

Opons

Lube

C 250 µ Oshore Paint RAL 1018

D 350 µ Oshore Paint RAL 1018

E C5-M

F ACQPA

G FROSIO

H NORSORK M501

Coang

System

Component

Test

Run Test

Run Test Opons

Code Test Descripon

Standard Production

Tests

Witnessed Standard

Production Tests

API Linearity Test (5

Point Curve)

Witnessed API

Linearity Test

API Repeatabil-

ity Test (10 Point

Curve)

Witnessed API

Repeatability Test

API Test Package 10 point curve, hydro,

Witnessed API Test

Package

Customer Final

Inspection

1 PMI - Weed metallic parts

7 Radiography for welds only

Includes Std. Production

Tests

Includes Std. Production

Tests

Includes Std. Production

& API Linearity Tests

Includes Std. Production

& API Linearity Tests

production test

10 point curve, hydro,

production test wit-

Per visit

Figure 4. Global MRA/MRB Model Code Extra

12 Installation, Operations & Maintenance Manual

ROUTINE MAINTENANCE KITS mRoy A & B

mRoy RPM kits for pumps noted above

Part Number Descripon 1 Descripon 2

RPM1001 KIT MRA 316L VITON ORING NPT PLGR CODE C,D,E,F

RPM1002 KIT MRA PVC VITON ORING NPT PLGR CODE C,D

RPM1036 KIT MRA PVC TEFLEX ORING NPT PLGR CODE C,D

RPM1037 KIT MRA PVC VITON ORING NPT PLGR CODE E,F

RPM1038 KIT MRA PVC TEFLEX ORING NPT PLGR CODE E,F

RPM1003 KIT MRA A20 VITON ORING NPT PLGR CODE C,D,E,F

RPM1004 KIT MRA C22 VITON ORING NPT PLGR CODE C,D,E,F

RPM1005 KIT MRA PVDF VITON ORING NPT PLGR CODE C,D

RPM1039 KIT MRA PVDF TEFLEX ORING NPT PLGR CODE E,F

RPM1040 KIT MRA PVDF VITON ORING NPT PLGR CODE C,D

RPM1041 KIT MRA PVDF TEFLEX ORING NPT PLGR CODE E,F

RPM1006 KIT MRA FLOR VITON ORING NPT PLGR CODE C,D

RPM1042 KIT MRA FLOR TEFLEX ORING NPT PLGR CODE C,D

RPM1043 KIT MRA FLOR VITON ORING NPT PLGR CODE E,F

RPM1044 KIT MRA FLOR TEFLEX ORING NPT PLGR CODE E,F

RPM1007 KIT MRA SLURRY VITON ORING NPT PLGR CODE E,F

RPM1008 KIT MRA 316 HV VITON ORING NPT PLGR CODE C,D,E,F

RPM1009 KIT MRA A20 HVVITON ORING NPT PLGR CODE C,D,E,F

RPM1010 KIT MRA 316L EPDM ORING NPT PLGR CODE C,D,E,F

RPM1011 KIT MRA 316L TEFLEX ORING NPT PLGR CODE C,D,E,F

RPM1012 KIT MRA A20 EPDM ORING NPT PLGR CODE C,D,E,F

RPM1013 KIT MRA A20 TEFLEX ORING NPT PLGR CODE C,D,E,F

RPM1014 KIT MRB-K 316L VITON ORING PLGR CODE K

RPM1015 KIT MRB-K A20 VITON ORING PLGR CODE K

RPM1016 KIT MRB-K 316L EPDM ORING PLGR CODE K

RPM1017 KIT MRB-K 316L TEFLEX ORING PLGR CODE K

RPM1018 KIT MRB-K A20 EPDM ORING PLGR CODE K

RPM1019 KIT MRB-K A20 TEFLEX ORING PLGR CODE K

RPM1020 KIT MRB-L/R 316L VITON ORING PLGR CODE L,R

RPM1021 KIT MRB-L/R 316L EPDM ORING PLGR CODE L,R

RPM1022 KIT MRB-L/R 316L TEFLEX ORING PLGR CODE L,R

RPM1023 KIT MRB-L/R A20 VITON ORING PLGR CODE L,R

RPM1024 KIT MRB-L/R A20 EPDM ORING PLGR CODE L,R

RPM1025 KIT MRB-L/R A20 TEFLEX ORING PLGR CODE L,R

RPM1026 KIT MRB-L/R PVC VITON ORING PLGR CODE L,R

RPM1027 KIT MRB-L/R PVC EPDM ORING PLGR CODE L,R

RPM1028 KIT MRB-L/R PVC TEFLEX ORING PLGR CODE L,R

Figure 5. RPM KITS

13Installation, Operations & Maintenance Manual

RPM1029 KIT MRB-L/R PVDF VITON ORING PLGR CODE L,R

RPM1030 KIT MRB-L/R PVDF EPDM ORING PLGR CODE L,R

RPM1031 KIT MRB-L/R PVDF TEFLEX ORING PLGR CODE L,R

Figure 5. RPM KITS

mRoy Series Capacity/Pressure Selection - Metallic Liquid Ends

●Capacies shown are for simplex. Double capacity for duplex

●Actuators, rupture detecon, and high viscosity opons require capacity derang per the table on the next page

●Plasc liquid ends are limied to 150 psi - 10 bar

mRoy Series

Plunger

Diameter Code

3/8”

9.5 mm

7/16”

11.1 mm

5/8”

15.9 mm

1 1/16”

27 mm

Strokes/Minute

Gear

Rao

60 hz 1725 RPM

50 hz 1425

RPM

Code

77 23 19 0.36

48 37 30 0.73

24 73 60 1.44

15 117 96 2.32

10 185 152 3.64

8 - 178

77 23 19 0.57

48 37 30 0.8

24 73 60 1.7

15 117 96 2.8

10 185 152 4.4

8 - 178

48 37 30 1.8

24 73 60 3.8

15 117 96 6.2

10 185 152

8 - 178

48 37 30 6.1

24 73 60 12.3

15 117 96 19.4

10 185 152 30.0

8 - 178

Capacity / Pressure @ 60 hz 1725 RPM Capacity / Pressure @ 50 hz 1425 RPM

Rangs at

100 psi/7 bar

Capacity at Max pressure

Capacity Max Pressure Capacity Max Pressure

Rangs at

100 psi/7 bar

Capacity at Max pressure

GPH L/hr GPH L/hr PSI Bar GPH L/hr GPH L/hr PSI Bar

0.20

1.4

0.34

2.8

0.68

5.5

1.09

8.8

1.72

13.8

- - - -

0.4

2.2

0.6

1.2

6.4

10.6

16.7

3.1

- - - -

1.6

6.8

3.5

14.4

5.7

23.5

9.4 35.6 8.4 31.8

- - - -

5.5

23.1

11.2

46.6

18.1

73.4

29.0

113.6

- - - -

0.8

1.3

2.6

4.1

6.5

1.5

2.3

4.5

7.6

11.7

6.1

13.2

21.6

20.8

42.4

68.5

109.8

2000 137.9

- -

1800 124.1

- -

700 48.3

925 63.8

- -

350 24.1

200 13.8

- -

0.30 1.1 0.17 0.6 2000 137.9

0.61 2.3 0.28 1.1 2000 137.9

1.20 4.5 0.57 2.2 2000 137.9

1.93 7.3 0.91 3.4 2000 137.9

3.03 11.5 1.43 5.4 2000 137.9

3.55 13.4 1.67 6.3 2000 137.9

0.48 1.8 0.33 1.2 1800 124.1

0.67 2.5 0.50 1.9 1800 124.1

1.42 5.4 1.00 3.80 1800 124.1

2.33 8.8 1.67 6.30 1800 124.1

3.67 13.9 2.58 9.80 1800 124.1

4.30 16.3 3.02 11.40 1800 124.1

1.50 5.7 1.3 5.0 700 48.3

3.17 12 2.9 11.1 925 63.8

5.17 19.6 4.8 18.0 925 63.8

7.83 29.6 7.0 26.5 925 63.8

9.17 34.7 8.2 31.0 925 63.8

5.08 19.2 4.6 17.3

10.25 38.8 9.3 35.3

16.17 61.2 15.1 57.1

25.00 94.6 24.2 91.5

29.28 110.8 28.3 107.1

350 24.1

200 13.8

Figure 6. mRoy A Metallic Liquid End Capacity Tables

14Installation, Operations & Maintenance Manual

38 48

19/32”

15.1 mm

7/8”

22.2 mm

1 7/16”

36.5 mm

25 72

19 96

12 144

10 -

38 48

25 72

19 96

12 144

10 -

38 48

25 72

19 96

12 144

120

148 1500

120

148 1000

120

4.7

17.8

7.0

26.5

9.5

13.3

50.3

10.0

37.9

16.0

60.6

21.0

79.5

30.4

115.1

27.0

102.2 21.0 79.5 400

42.0

57.0

215.7 51.0 193 400

85.0

321.7 79.0 299 400

3.3

5.6

7.1

11.4

4.7

11.0

16.0

25.6

159 36.0 136.3 400

12.5 1500

21.2 1500

26.9 1500

43.1 1500

17.8 1000

41.6 1000

60.6 1000

96.9 1000

103.4

3.92 14.8 2.8 10.4 1500

103.4

5.83 22.1 4.7 17.7 1500

103.4

7.92 30 5.9 22.4 1500

103.4

11.08 41.9 9.5 36.0 1500

103.4

13.67 51.7 11.72 44.3 1500

8.33 31.5 3.9 14.8 1000

13.33 50.5 9.2 34.7 1000

17.50 66.2 13.3 50.5 1000

25.33 95.9 21.3 80.7 1000

31.24 118.2 26.31 99.6 1000

27.6

22.50 85.2 17.5 66.2 400

27.6

35.00 132.5 30.0 113.6 400

27.6

47.50 179.8 42.5 160.9 400

27.6

70.83 268.1 65.8 249.2 400

103.4

27.6

10 -

148

- - - -

400

27.6

Figure 7. mRoy B Metallic Liquid End Capacity Tables

mRoy Series Capacity/Pressure Selection - Plastic Liquid Ends

●Includes PVC, PVDF liquid ends, and liquid ends for Fluoride applicaons

●Capacies shown are for simplex. Double capacity for duplex

●Actuators, rupture detecon, and high viscosity opons require capacity derang per the table on the next page

●Please note that plasc liquid ends are not available for plunger code “K” - mRoy B frame with 19/32” (15.1 mm) plunger.

mRoy Series

Plunger

Diameter Code

3/8”

9.5 mm

7/16”

11.1 mm

5/8”

15.9 mm

Strokes/Minute

Gear

Rao

60 hz 1725

RPM

50 hz

1425 RPM

Code

77 23 19 0.32 1.2 0.28 1.1 150 10.3 0.27 1 0.23 0.9 150 10.3

48 37 30 0.68 2.6 0.62 2.3 150 10.3 0.57 2.2 0.52 2 150 10.3

24 73 60 1.35 5.1 1.30 4.9 150 10.3 1.13 4.3 1.08 4.1 150 10.3

15 117 96 2.20 8.3 2.10 7.9 150 10.3 1.83 6.9 1.75 6.6 150 10.3

77 23 19 0.5 1.9 0.45 1.7 150 10.3 0.42 1.6 0.38 1.4 150 10.3

48 37 30 0.7 2.6 0.65 2.5 150 10.3 0.58 2.2 0.54 2 150 10.3

24 73 60 1.5 5.7 1.4 5.3 150 10.3 1.25 4.7 1.17 4.40 150 10.3

15 117 96 2.5 9.5 2.4 9.1 150 10.3 2.08 7.9 2.00 7.60 150 10.3

48 37 30 1.6 6.1 1.5 5.7 150 10.3 1.33 5 1.3 4.7 150 10.3

24 73 60 3.5 13.2 3.4 12.9 150 10.3 2.92 11.1 2.8 10.7 150 10.3

15 117 96 5.6 21.2 5.5 20.8 150 10.3 4.67 17.7 4.6 17.3 150 10.3

Capacity / Pressure @ 60 hz 1725 RPM Capacity / Pressure @ 50 hz 1425 RPM

Rangs at

100 psi/7 bar

Capacity at Max pressure

Capacity Max Pressure Capacity Max Pressure

GPH L/hr GPH L/hr PSI Bar GPH L/hr GPH L/hr PSI Bar

87.36 330.6 81.19 307.3 400

Rangs at

Capacity at Max pressure

100 psi/7 bar

27.6

1- 1/16”

27 mm

48 37 30 5.7 21.6 5.6 21.2 150 10.3 4.75 18 4.7 17.7 150 10.3

24 73 60 11.3 42.8 11.2 42.4 150 10.3 9.42 35.7 9.3 35.3 150 10.3

15 117 96 18.1 68.5 18.0 68.1 150 10.3 15.08 57.1 15.0 56.8 150 10.3

Figure 8. mRoy A Plastic Liquid End Capacity Tables

15 Installation, Operations & Maintenance Manual

38 48 40 10.0 37.9 4.7 17.8 150 10.3 8.33 31.5 3.9 14.8 150 10.3

7/8”

22.2 mm

1 - 7/16”

36.5 mm

25 72 60 16.0 60.6 11.0 41.6 150 10.3 13.33 50.5 9.2 34.7 150 10.3

19 96 80 21.0 79.5 16.0 60.6 150 10.3 17.50 66.2 13.3 50.5 150 10.3

12 144 120 30.4 115.1 25.6 96.9 150 10.3 25.33 95.9 21.3 80.7 150 10.3

10 - 148 150 10.3 31.24 118.2 26.31 99.6 150 10.3

38 48 40 27.0 102.2 21.0 79.5 150 10.3 22.50 85.2 17.5 66.2 150 10.3

25 72 60 42.0 159 36.0 136.3 150 10.3 35.00 132.5 30.0 113.6 150 10.3

19 96 80 57.0 215.7 51.0 193 150 10.3 47.50 179.8 42.5 160.9 150 10.3

12 144 120 85.0 321.7 79.0 299 150 10.3 70.83 268.1 65.8 249.2 150 10.3

10 - 148 - - - - 150 10.3 87.36 330.6 81.19 307.3 150 10.3

Figure 9. mRoy B Plastic Liquid End Capacity Tables

mRoy PUMP FLOW DERATING TABLE

NOTES:

Certain options require that the maximum capacity be derated. Multiply capacities in the capacity / pressure tables in Figures 7 through 10 by the appropriate factors in the table above.

Figure 11. mRoy Pump (All Models) Capacity Derating Table

16 Installation, Operations & Maintenance Manual

SECTION 2 - INSTALLATION

2.1 UNPACKING/INSPECTION

Units are shipped Ex Works and the title passes to the customer when the carrier signs for receipt of the unit. In the event that damages occur during shipment, it is the responsibility of the customer to

notify the carrier immediately and to le a damage

claim. Carefully examine the shipping crate upon receipt from the carrier to be sure there is no obvious damage to the contents. Open the crate carefully so accessory items fastened to the inside of the crate will not be damaged or lost. Examine all material inside the crate and check against the packing list to be sure that all items are accounted for and intact.

2.2 STORAGE

Short Term Storage (Less than 6 Months)

It is preferable to store the material under a shelter in its original package to protect it from adverse weather conditions. In condensing atmospheres, follow the long term storage procedure.

Long Term Storage (Longer than 6 Months)

The primary consideration in storage of pump equipment is to prevent corrosion of external and internal components. This corrosion is caused by natural circulation of air as temperature of the surroundings change from day to night, day to day, and from season to season. It is not practical to prevent this circulation which carries water vapor and other corrosive gasses, so it is necessary to protect internal and external surfaces from their effects to the greatest extent possible.

When the instructions given in this section are completed, the equipment is to be stored in a shelter; protected from direct exposure to weather. The prepared equipment should be covered with a plastic sheet or a tarpaulin, but in a manner which will allow air circulation and prevent capture of moisture. Equipment should be stored 12 inches (.304 meters) or more above the ground.

If equipment is to be shipped directly from Milton Roy into long term storage, contact Milton Roy to arrange for long term storage preparation.

Pump Drive

1. Remove motor and flood the gearbox compartment with a high grade lubricating oil/rust preventative Mobile Oil Corporation product Mobilarma 524 or approved equivalent. Fill the compartment completely to minimize air

space. After storage, drain this oil and rell the

equipment with the recommended lubricant for equipment commissioning.

2. Brush all unpainted metal surfaces with multipurpose grease NLGI grade 2 or 3 or approved equivalent. Store these unattached.

Electrical Equipment

1. Motors should be prepared in the manner prescribed by their manufacturer. If information is not available, dismount and store motors as indicated in step 3 below.

2. Dismount electrical equipment (including motors) from the pump.

3. For all electrical equipment, place packets of Vapor Phase Corrosion Inhibitor (VPCI) inside of the enclosure, then place the entire enclosure, with additional packets, inside a plastic bag. Seal the bag tightly closed. Contact Milton Roy Service Department for recommended VPCI materials.

17 Installation, Operations & Maintenance Manual

SECTION 2 - INSTALLATION

2.3 SAFETY PRECAUTIONS

When installing, operating, and maintaining the mRoy pump, keep safety considerations foremost. Use proper tools, protective clothing, and eye protection when working on the equipment and install the equipment in compliance of NEC, NEPA and local codes. Follow the instructions in this manual and take additional safety measures appropriate to the liquid being pumped. Be extremely careful in the presence of hazardous substances (e.g., corrosives, toxics, solvents,

acids, caustics, ammables, etc.).

2.4 PUMP MOUNTING&LIFTING/ LOCATION

The mRoy pump can be mounted on any surface

that is at and level for the support feet. Three

mounting bolt holes are provided in the support feet

for use when the pump is to be rmly anchored to

a base surface (see Figure 14.)

Increased reliability can be expected if pump locations are avoided which are subjected to high ambient temperatures above 100°F (38°C) with

poor free-air circulation over the pump assembly.

2.5 OUTDOOR INSTALLATIONS

The mRoy pump is designed as a totally enclosed unit suitable for installation either indoors or outdoors. However, for outdoor installations the pump mounting area should be selected to provide protection against environmental extremes:

1. Operation with continuous exposure to sunshine with ambient temperatures above 90°F (32°C), which would cause higher oil temperatures and reduce lubricity should be avoided. Good installation practice would dictate providing a sun shade over the pump with open sides to obtain the best air circulation around the pump.

2. Frequent start-up where the pump has been idle in an ambient temperature below 30°F (-1°C) is not recommended. Provide a removable, insulated enclosure over the pump and mounting base with provisions for an electrical heater (100 watt light, heat lamp, heater tape etc.) to

Lifting

Put the sling under the motor terminal box and

under the motor ange. Cross the two ends

of the sling and close the loop (see diagrams). Before attempting to move it, check that the entire unit is well balanced.

Note: As soon as the pump is in position, fasten it down.

18Installation, Operations & Maintenance Manual

• B Series Hole Size = Dia 0.41” (10.4 mm) • A Series Hole Size = Dia 0.38” (9.6 mm)

Figure 14. Mounting Bolt Holes

19Installation, Operations & Maintenance Manual

SECTION 2 - INSTALLATION

maintain the pump oil temperature above 30°F (-1°C).

2.6 FLANGE MOUNTED MOTORS

If a ange mounted motor option was selected for

the mRoy pump, the customer supplied motor will need to be mounted to the pump. This is generally a straight forward procedure. Refer to Figure 17 or 18, as appropriate.

When mounting the motor to a Close Coupled Flange, the motor mount plate (710) must be removed from the pump body and bolted to the motor. The motor/motor mount plate assembly can then be bolted to the pump.

2.7 ELECTRICAL CONNECTIONS

Check to be sure that the electrical supply matches the pump motor nameplate electrical characteristics. Motor rotation must be counter clockwise when viewed from the top end of the motor.

ON SINGLE-PHASE

PUMP MOTORS THE ROTATION WILL BE DETERMINED AT THE FACTORY AND MUST NOT BE CHANGED. ON THREE-PHASE PUMP MOTORS THE ROTATION MUST BE DETERMINED AT THE TIME OF INSTALLATION AND PRIOR TO START-UP. OPERATION WITH THE WRONG ROTATION WILL DAMAGE THE PUMP AND MOTOR AND VOID THE WARRANTY. SHAFT ROTATION CAN BE OBSERVED BY REMOVING THE COVER PLATE OVER THE ELECTRICAL CONNECTIONS.

2.8 MOTORS

Adequate power is provided to the simplex mRoy A pump by the standard ¼ HP (0.25 Kw) motor. The motor is normally a totally enclosed non-ventilated,

type, that is mounted on a 56C-face ange or IEC Frame 71 ange. The gear reducer (worm shaft) ts

onto the standard motor without using a coupling.

On the larger mRoy B (Figures 10-13), the normal temperature rise for these motors is 50°C above ambient temperature, and it can be expected that these motors will appear to operate at higher temperatures than are normally experienced. However, there is no cause for worry if the following precautions are observed:

1. The motor is placed where there is adequate ventilation and is protected against excessive radiation from steam pipes and other heat sources.

2. The overload heater in the starting device should be correctly sized for motor full load current rating as shown on the motor data plate.

Note: For a motor that is supplied by the customer, Milton Roy is not responsible for any damage resulting from an improper installation or for a motor that is not suitable for the selected environment.

2.9 PUMP LUBRICATION

CAREFULLY UNSCREW

TO REMOVE OIL RESERVOIR CAP. DO NOT APPLY PRESSURE TO JOG CAP FROM SIDE TO SIDE OR DIP STICK MAY BREAK.

Oil is supplied for the average installation (ambient temperature above 50°F (10°C). See recommendation below for lower temperature. Fill pump and gear box by slowly pouring the recommended oil through the air bleed reservoir opening until the oil level in the reservoir is level with oil level mark on outside surface of reservoir. Level can also be checked with dipstick on oil reservoir cap. Recheck while pump is operating.

DO NOT OVER FILL AS

MOTOR DAMAGE CAN RESULT.

20 Installation, Operations & Maintenance Manual

SECTION 2 - INSTALLATION

NOTE:

Synthetic oils are available that span the entire temperature range. Contact Milton Roy for further information.

Recommended Oil

Any equivalent oil is acceptable.

Ambient

Oil Type

AGMA Spec No. 2 EP No. 5 EP

Zurn Oil Co No. EP 35 No. EP 95

ISO Grade 68 220

Nominal Oil Capacity

Oil Type

AGMA Spec No. 2 EP No. 5 EP

Zurn Oil Co

Temp. 15-50 °F (-9-10

Temp. 15-50 °F

(-9-10 °C)

Ambient

°C)

No. EP 35 No. EP 95

Ambient

Temp. Above

50°F(10°C)

Ambient

Temp. Above

50°F(10°C)

2.10 PIPING

General

Refer to Figure 15 for a diagram of a typical Piping and Instrumentation Diagram.

Support all piping connections to the pump so that no stress is placed on pump fittings. In no case should the piping be sprung to make the connections to the pump. The suction and discharge cartridge pipe connections can be positioned within an arc of approximately 150° to facilitate piping to pump.

pressured start-up of the nal installation.

Install shut-off valves, with unions on the pump side of the valves, in the suction and discharge lines to facilitate servicing.

Use extreme care in piping to plastic liquid end pumps with rigid pipe such as PVC. If excessive stresses or vibration is unavoidable, flexible connections are recommended.

NOTE:

Many pipe joint compounds are not suitable for use with plastic pipe and, if used, will cause stress cracking at the connection. Use only compounds commended for use with plastic materials.

Suction Piping

The suction piping must be absolutely tight and leak free. For mRoy pumps on water-like solutions we recommend that the suction pipe be ¾” minimum diameter and a maximum of 6 feet (2 meters) long. The intent is that the piping must be designed to provide an adequate net positive suction head (NPSH). Obtain our NPSH Calculation software at the Milton Roy website (www.miltonroy.com). If assistance in determining NPSH is needed, contact the Milton Roy Aftermarket Service department through the website (www.miltonroy.com)

A ooded suction is recommended for optimum

service life and maintenance-free operation. However, the mRoy pump can operate with less

than ooded suction if necessary, in accordance

with the following schedule shown in the chart below.

Flush and blow out all pipelines before connecting the pump. This eliminates any foreign matter that might seriously damage the internal working parts of the liquid end. Install a 20 mesh Y-type strainer that is sized to remove foreign particles with minimum pressure drop in the suction line of the pump. It is also recommended to perform a leak test of the system with a neutral liquid before

Min. NPSH Max. Li

Model

Number

mRoy A RA 10 10 (3)

mRoy H/T RH or RT 10 10 (3)

mRoy P RP 10 10 (3)

(PSI)

(Ft. (meter) H2O)

(Bar)

21Installation, Operations & Maintenance Manual

SECTION 2 - INSTALLATION

further relief valve discussion. (Milton Roy offers a complete line of back pressure and safety valves).

Refer to “Installation with Suction Lift,” which outlines limiting conditions if suction lift requirements are anticipated.

The supply tank should incorporate a low-level switch to cut off the pump motor before the suction intake is exposed to air. Otherwise, the pump may occasionally run dry.

Discharge Piping

The installation of an external Safety Valve is recommended, since the pump’s internal relief valve is not intended to protect the piping system. Refer to “Setting the Relief Valve” in Section 3, for

For satisfactory metering and capacity control, the discharge pressure at the pump must be 50 PSI (3.5 Bar) minimum for the mRoy A and 70 PSI (4.8 Bar) minimum for the mRoy B. Therefore, when the pump is to discharge into an open system, a back pressure device must be installed in the pump discharge line.

REMOTE HEAD SYSTEMS: DO

NOT INSTALL A BACK

PRESSURE SPRING IN DISCHARGE BALL CHECK CARTRIDGE

OF DIAPHRAGM HEADS WHICH ARE “REMOTE MOUNTED”

(NOT ATTACHED TO THE MAIN HOUSING). A SEPARATE

BACK PRESSURE VALVE MUST BE INSTALLED IN THE

Figure 15. Typical Piping and Instrumentation Diagram

22 Installation, Operations & Maintenance Manual

SECTION 2 - INSTALLATION

2.11 OPERATION WITH SUCTION LIFT

It is desirable that the mRoy pump operate

with a ooded suction; however, operation with

net positive suction head (NPSH) less than atmospheric pressure is possible.

NPSH is the head available, above the vapor pressure of the liquid being pumped, to feed the liquid into the pump suction port. NPSH minimum is the head below which the pump cavitates.

Both values are calculated at the suction port of the pump. In controlled volume pump applications, two conditions must be considered in the selection of a pump to meet the NPSH minimum requirements:

1. At the start of the suction stroke, the liquid in the suction line has no velocity and NPSH minimum depends on the force necessary to accelerate the liquid in the suction pipeline.

2. At the peak of the suction stroke there is no acceleration factor and NPSH minimum depends on friction losses as calculated from

standard ow equations. With all viscous liquids

and in pilot plants and other places where unusual numbers of fittings and valves are used, the second condition that includes friction losses should be considered. For water-like

liquids, the rst condition will dene the limiting conguration.

For Static NPSH (Condition 1)

Available NPSH = Pa + Ph – Pv (must be equal to or greater than minimum NPSH as listed under Installation Instructions).

Required NPSH min = Sp. Gr. (0.0925) LpD

For Dynamic NPSH (Condition 2)

Available NPSH = Pa ± Ph – Pf Le (must be equal to or greater than minimum NPSH as listed under Installation Instructions).

D = Plunger Diameter (inches)

Dp = Pipe Diameter (inches)

Lp = Actual Length of suction pipe (feet)

Le = Equivalent length of suction pipe including

allowance for ttings (feet)

Pa = Ambient pressure above liquid (PSI)

Ph = Head of liquid column above (+) or below (–)

center line of plunger (PSI) equals Head in feet x (0.435) (Sp.Gr.)

Pv = Vapor pressure of liquid (PSI)

Pf = Friction loss per foot of pipe calculated from

Reynold Number evaluation (PSI) (Use 3.2 times average velocity for calculating friction losses when referring to a standard pipe losses table)

Minimum NPSH = Minimum hydraulic pressure at plunger (listed under Installation Instructions).

When operating the pump with a NPSH of less than atmospheric pressure (negative suction head or suction lift), special attention should be given to keep the suction line strainer clean and prevent other system conditions that might inadvertently decrease the NPSH available.

NOTE:

Obtain our NPSH calculation software at the Milton Roy website (miltonroy.com). If assistance in determining NPSH is needed, contact the Milton Roy Aftermarket Service Department.

Dp2

23Installation, Operations & Maintenance Manual

SECTION 3 - OPERATION

3.1 INITIAL START-UP

Before initial start up of the pump, check the following:

FAILURE TO CHECK

TORQUE ON NON METALLIC HEAD BOLTS PRIOR TO STARTUP AND AFTER ONE WEEK OF OPERATION MAY EXPOSE OPERATING PERSONNEL TO HAZARDOUS LIQUIDS.

1. Check the torque on all non-metallic head bolts

prior to startup. After one week of operation, reduce torque on all nonmetallic head bolts. Torque the head assembly screws in a crosswise pattern (Figure 16) as follows:

a) mRoy Model A Plastic Heads: 60–70 in. lbs.

(7-8 N-m) bolting torque.

b) mRoy Model B Plastic Heads:75–85 in. lbs.

(8.5-9.6 N-m) bolting torque, tie down nuts 25 in. lbs. (3 N-m).

2. Check the oil level in air bleed ller reservoir up

to or slightly above the indicated oil level.

3. Set the capacity control knob to approximately

30- 40% of maximum capacity.

is recommended to collect this uid to safe

drain point during this operation.

- First turn the pump ON

- Place the micrometer on the 50% position, for 10 minutes.

- Untighten the bleeder valve (360) by

around 1/4 turn located on the liquid end. Thus, the air trapped in the suction piping and the pump head can escape via the drain. Wait until the liquid comes up to the

evacuation level of this drain. Let it ow for a

few seconds in order to degas it completely, then retighten the drain plug.

On initial start up with 0% capacity, run the pump for 10–20 seconds, then stop for 20–30 seconds. Repeat a few times in or-

der to ll the diaphragm oil cavity. Check for

proper motor rotation as described in general installation instructions. During these short runs listen for any abnormal motor or crank noises, and if present, refer to Section 5, Troubleshooting.

4. Make certain that the suction line, liquid end

and discharge cartridge are lled with water or

system liquid.

5. Relieve all back pressure in the discharge line and pump hydraulic system to allow air to purge. Reduce pressure on the oil relief valve until air is purged. Refer to “Start-Up after the Suction System has Run Dry” section.

6. If practical, install a temporary discharge line piped back to the suction tank incorporating a 100 PSI (7 Bar) relief valve to facilitate

establishing performance during rst hours of

operation.

Priming

In order to prime the pump, it is necessary to purge the liquid end (to release air) by the bleeder valve (360). For toxic liquids, it

24 Installation, Operations & Maintenance Manual

Run pump for 1/2 to 1-1/2 hours to warm up oil.

Check discharge line for indication of ow.

Increase capacity adjustment setting to 100% of capacity and operate for 10–20 minutes.

KNOB IN EXCESS OF 100% BECAUSE ERRATIC OR REDUCED METERING WILL DEVELOP.

Reduce capacity adjustment setting to 30–40% of maximum capacity and operate for several minutes, then increase capacity adjustment back to 100% for approximately 10 minutes. Repeat several times to insure that the air is bled from the pump displacement chamber and the liquid end. (As a general rule, to bleed air or vapor from the pump oil displacement chamber reduce the capacity adjustment to the 20 to 40% range, and to bleed air or vapor from the liquid end increase

DO NOT SET THE CAPACITY ADJUSTMENT

+ 55 hidden pages

Milton Roy mROY B, mROY A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual