Milton Roy mRoy B User manual

mROY®A & B
Metering Pump IOM Manual
Manual No : 54649
Rev. : 03
Rev. Date : 5/2019
Original Version

3Installation, Operations & Maintenance Manual
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.

4Installation, 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).

5Installation, Operations & Maintenance Manual
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
TABLE OF CONTENTS

6Installation, 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

7Installation, 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

8Installation, Operations & Maintenance Manual
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
SECTION 1 - GENERAL DESCRIPTION

9Installation, Operations & Maintenance Manual
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
SECTION 1 - GENERAL DESCRIPTION

10 Installation, Operations & Maintenance Manual
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)
SECTION 1 - GENERAL DESCRIPTION

11Installation, 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
10 20 30 40 50 60 70 80 90 100 110 120
End Item # Heads Mat’l Plg Dia Gear
Rao Motor Motor mount
Sucon
Conn
Dischrge
Conn
O Ring
Material
Cap
Control
Dia
Rupture
Detect
Base
MRA 1 Dup L/R Dup L/R 77 C - CC N
MRB 2 A-B A-B 48 A - API Y
38 M* - META V (VSD)
Mat’l 25
1 316L SS 24
2PVC 19 Diaphragm Rupture Detecon
5 Alloy 20 15 N None
6 Hast C 12.5 3Pressure type w/gauge only
7 PVDF 9.5 4 Pressure type w/gauge & NEMA 4 Switch
8 Fluoride 8 5 Pressure type w/gauge & Ex Prf Switch
6Double Dia with intermed uid no probe
Plg Dia 7Double Dia w/ intermed uid & conduct probe
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) AECC NEMA 4 115V
B ECC NEMA 4 220V
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
CECC NEMA 4 115V - Asia
Connecons DECC NEMA 4 220V - Asia
Threaded - metal
P NPT
H BSPP - Horizontal O Ring Opons
VBSPP - 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
2ANSI 1/2 class 150 Plasc Slvnt wld
Figure 3. Global MRA/MRB Model Code

12 Installation, Operations & Maintenance Manual
Extended mRoy A & B Opons
Less Common Opon Extension
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 Temp Drive op-
ons
Motor
Opons Lube Coang System
Component
Test Run Test
Run Test Opons
Code Test Descripon
LE Opons NStandard Production
Tests
N None
VHigh viscosity AWitnessed Standard
Production Tests
S Slurry
D Degas BAPI Linearity Test (5
Point Curve)
Includes Std. Production
Tests
E Europe source parts
GG7 weed parts C Witnessed API
Linearity Test
Includes Std. Production
Tests
C NACE MR175
D
API Repeatabil-
ity Test (10 Point
Curve)
Includes Std. Production
& API Linearity Tests
Temperature Opons
N Standard, 20F to 190F (-7 to 88C) E
Witnessed API
Repeatability Test
Includes Std. Production
& API Linearity Tests
1 Low ambient, -40 to 20F (-40 to -7C)
2 High, 190 to 300F (88 to 149C) FAPI Test Package 10 point curve, hydro,
production test
3 Temp control jacket
GWitnessed API Test
Package
10 point curve, hydro,
production test wit-
Drive Opons
N Standard HCustomer Final
Inspection
Per visit
HHigh sucon pressure
S Sand protect design
M Marine design Component Tests
RRetrot base EMEA N None
1PMI - Weed metallic parts
Motor Opons 2PMI and Hydro Combinaon
N No 3 Hydrostac test 1.5 x max rang - head only
YYes 4Hydrostac Test & Cercate
VVariable freq drive 5Witnessed Hydrostac Test & Cercate
C Motor w/ VFD 6 Dye penetrant for welds only
7 Radiography for welds only
Lubricaon Opons
N Standard
3
Low temp non synthec (15 to
50F) Coang Systems
4 Food Grade Oil N Standard RAL 1018
5High performance synthec A Paint 160 µ RAL 1018
9 Ship without oil B Food Grade Paint - RAL 9010
C250 µ Oshore Paint RAL 1018
D350 µ Oshore Paint RAL 1018
E C5-M
FACQPA
G FROSIO
H NORSORK M501
Figure 4. Global MRA/MRB Model Code Extra

13Installation, 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

14Installation, Operations & Maintenance Manual
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 Gear
Rao
Code
Strokes/Minute Capacity / Pressure @ 60 hz 1725 RPM Capacity / Pressure @ 50 hz 1425 RPM
60 hz
1725
RPM
50 hz
1425
RPM
Rangs at
100 psi/7 bar
Capacity at Max pressure Rangs at
100 psi/7 bar
Capacity at Max pressure
Diameter Code Capacity Max Pressure Capacity Max Pressure
GPH L/hr GPH L/hr PSI Bar GPH L/hr GPH L/hr PSI Bar
A
3/8”
9.5 mm
C
77 23 19 0.36 1.4 0.20 0.8 2000 137.9 0.30 1.1 0.17 0.6 2000 137.9
48 37 30 0.73 2.8 0.34 1.3 2000 137.9 0.61 2.3 0.28 1.1 2000 137.9
24 73 60 1.44 5.5 0.68 2.6 2000 137.9 1.20 4.5 0.57 2.2 2000 137.9
15 117 96 2.32 8.8 1.09 4.1 2000 137.9 1.93 7.3 0.91 3.4 2000 137.9
10 185 152 3.64 13.8 1.72 6.5 2000 137.9 3.03 11.5 1.43 5.4 2000 137.9
8- 178 - - - - - - 3.55 13.4 1.67 6.3 2000 137.9
7/16”
11.1 mm
D
77 23 19 0.57 2.2 0.4 1.5 1800 124.1 0.48 1.8 0.33 1.2 1800 124.1
48 37 30 0.8 30.6 2.3 1800 124.1 0.67 2.5 0.50 1.9 1800 124.1
24 73 60 1.7 6.4 1.2 4.5 1800 124.1 1.42 5.4 1.00 3.80 1800 124.1
15 117 96 2.8 10.6 27.6 1800 124.1 2.33 8.8 1.67 6.30 1800 124.1
10 185 152 4.4 16.7 3.1 11.7 1800 124.1 3.67 13.9 2.58 9.80 1800 124.1
8- 178 - - - - - - 4.30 16.3 3.02 11.40 1800 124.1
5/8”
15.9 mm
E
48 37 30 1.8 6.8 1.6 6.1 700 48.3 1.50 5.7 1.3 5.0 700 48.3
24 73 60 3.8 14.4 3.5 13.2 925 63.8 3.17 12 2.9 11.1 925 63.8
15 117 96 6.2 23.5 5.7 21.6 925 63.8 5.17 19.6 4.8 18.0 925 63.8
10 185 152 9.4 35.6 8.4 31.8 925 63.8 7.83 29.6 7.0 26.5 925 63.8
8- 178 - - - - - - 9.17 34.7 8.2 31.0 925 63.8
1 1/16”
27 mm
F
48 37 30 6.1 23.1 5.5 20.8 350 24.1 5.08 19.2 4.6 17.3 350 24.1
24 73 60 12.3 46.6 11.2 42.4 350 24.1 10.25 38.8 9.3 35.3 350 24.1
15 117 96 19.4 73.4 18.1 68.5 350 24.1 16.17 61.2 15.1 57.1 350 24.1
10 185 152 30.0 113.6 29.0 109.8 200 13.8 25.00 94.6 24.2 91.5 200 13.8
8- 178 - - - - - - 29.28 110.8 28.3 107.1 200 13.8
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
Figure 6. mRoy A Metallic Liquid End Capacity Tables

15 Installation, Operations & Maintenance Manual
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 Gear
Rao
Code
Strokes/Minute Capacity / Pressure @ 60 hz 1725 RPM Capacity / Pressure @ 50 hz 1425 RPM
60 hz
1725
RPM
50 hz
1425
RPM
Rangs at
100 psi/7 bar
Capacity at Max pressure
Rangs at
100 psi/7 bar
Capacity at Max pressure
Diameter Code Capacity Max Pressure Capacity Max Pressure
GPH L/hr GPH L/hr PSI Bar GPH L/hr GPH L/hr PSI Bar
A
3/8”
9.5 mm
C
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
7/16”
11.1 mm
D
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
5/8”
15.9 mm
E
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
1- 1/16”
27 mm
F
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
B
19/32”
15.1 mm
K
38 48 40 4.7 17.8 3.3 12.5 1500 103.4 3.92 14.8 2.8 10.4 1500 103.4
25 72 60 7.0 26.5 5.6 21.2 1500 103.4 5.83 22.1 4.7 17.7 1500 103.4
19 96 80 9.5 36 7.1 26.9 1500 103.4 7.92 30 5.9 22.4 1500 103.4
12 144 120 13.3 50.3 11.4 43.1 1500 103.4 11.08 41.9 9.5 36.0 1500 103.4
10 -148 1500 103.4 13.67 51.7 11.72 44.3 1500 103.4
7/8”
22.2 mm
L
38 48 40 10.0 37.9 4.7 17.8 1000 69 8.33 31.5 3.9 14.8 1000 69
25 72 60 16.0 60.6 11.0 41.6 1000 69 13.33 50.5 9.2 34.7 1000 69
19 96 80 21.0 79.5 16.0 60.6 1000 69 17.50 66.2 13.3 50.5 1000 69
12 144 120 30.4 115.1 25.6 96.9 1000 69 25.33 95.9 21.3 80.7 1000 69
10 -148 1000 69 31.24 118.2 26.31 99.6 1000 69
1 7/16”
36.5 mm
R
38 48 40 27.0 102.2 21.0 79.5 400 27.6 22.50 85.2 17.5 66.2 400 27.6
25 72 60 42.0 159 36.0 136.3 400 27.6 35.00 132.5 30.0 113.6 400 27.6
19 96 80 57.0 215.7 51.0 193 400 27.6 47.50 179.8 42.5 160.9 400 27.6
12 144 120 85.0 321.7 79.0 299 400 27.6 70.83 268.1 65.8 249.2 400 27.6
10 -148 - - - - 400 27.6 87.36 330.6 81.19 307.3 400 27.6
Figure 7. mRoy B Metallic Liquid End Capacity Tables
Figure 8. mRoy A Plastic Liquid End Capacity Tables

16 Installation, Operations & Maintenance Manual
Figure 11. mRoy Pump (All Models) Capacity 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.
mRoy PUMP FLOW DERATING TABLE
B
7/8”
22.2 mm
L
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
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
1 - 7/16”
36.5 mm
R
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

17 Installation, Operations & Maintenance Manual
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.
SECTION 2 - INSTALLATION

18Installation, Operations & Maintenance Manual
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
SECTION 2 - INSTALLATION
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.

19Installation, Operations & Maintenance Manual
Figure 14. Mounting Bolt Holes
• B Series Hole Size = Dia 0.41” (10.4 mm) • A Series Hole Size = Dia 0.38” (9.6 mm)

20 Installation, Operations & Maintenance Manual
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.
SECTION 2 - INSTALLATION