mRoy series Models A & B metering pumps are controlled-volume, hydraulically-
actuated diaphragm pumps that are designed for consistent chemical delivery. Its
compact design contains a plunger that reciprocates at a fixed stroke, displacing
a fixed volume of hydraulic fluid and thereby actuating a flexible, chemically inert
PTFE diaphragm to create the pumping action. This field-proven design enables
metering with repetitive steady-state accuracy at a ±1% range. Designed to
meet global industry standards, Models A & B provide accurate dosing of a broad
spectrum of fluids. Like all mRoy metering pumps, Models A & B are built to run
constantly all year long with preventative maintenance, leading to decades of
consistent performance.
ApplicationsInjection of chemicals such as coagulants, biocides, disinfectants, polymers, softening agents, acids and bases for pH control, scale and corrosion inhibitors, oxygen scavengers, process additives, and many more for the following areas of application:
• Chemical and petrochemical processing• Cooling towers and boilers • Drinking water treatment• Oil and gas production • Food and beverages industry• Industrial water and wastewater treatment• Pharmaceuticals production• Power generation
Features and Benefits• Hydraulically-balanced PTFE diaphragm, designed for 96,000 hours operating life, does not use seals and eliminates plunger packing maintenance.
• Liquid end bleed system makes it easier to commission a new or a newly maintained pump.
• Worm and pinion drive operating in an oil bath lubrication produces a smooth mechanical motion that eliminates wear and tear of mechanical lost motion designs and assures long gear and bearing life.
• Dust-tight cast iron housing provides a rugged enclosure for operation in the harshest plant and field environments.
• Micrometer capacity adjustment enables accurate output flow control.
• Internal hydraulic pressure relief valve automatically protects the pump’s hydraulic system from over pressure conditions.
• High-performance, adjustable, cartridge-type check valves provide positive, repeatable sealing on every pump stroke.
• Metallic and non-metallic liquid end materials, available for corrosion resistance in any chemical application.
• The pump is capable of withstanding a wide range of fluid and ambient temperatures with options for extreme low and high temperature requirements.
• Simplex and duplex versions available.
• The pump meets standards for CE, ATEX, and API 675.
• Extensive motor mount and pipe connection options are available for process compatibility and simple integration into chemical injection systems.
• Process compatibility options are easily selected such as heating/cooling liquid end jackets, configurations for slurries or viscous fluids, unique material combinations, etc.
Models A & B
an Accudyne Industries brand
mRoy ®Metering Pumps
Literature #59193.02
©2016 Milton Roy, LLC. All rights reserved.
Maximum Capacity Ratings
Motor
50 hz - 1425 RPM
60 hz - 1725 RPM
gph
0.30 to 87.36
0.36 to 85
l/hr
1.1 to 330.6
1.4 to 321.7
General Specifications
mROY Model A - Metallic Liquid Ends
mROY Model B - Metallic Liquid Ends
an Accudyne Industries brand
mRoyModel
mRoyModel
A
B
Plunger GearRatioCodeDiameter Code
Plunger
3/8 in
9.5 mmC
D
E
F
K
L
R
19/32 in
15.1 mm
7/16 in
11.1 mm
7/8 in
22.2 mm
5/8 in
15.9 mm
1-7/16 in
36.5 mm
1-1/16 in
27 mm
Stroke/Minute
Stroke/Minute
60 hz1725 rpm
60 hz1725 rpm
50 hz1425 rpm
50 hz1425 rpm
Ratings at100 psi/7 bar
Ratings at100 psi/7 bar
Ratings at100 psi/7 bar
Ratings at100 psi/7 bar
gph
gph
gph
gph
gph
gph
gph
gph
l/hr
l/hr
l/hr
l/hr
l/hr
l/hr
l/hr
l/hr
psi
psi
psi
psi
bar
bar
bar
bar
Max Pressure
Max Pressure
Max Pressure
Max Pressure
Capacity
Capacity
Capacity
Capacity
Capacity/Pressure @ 60 hz 1725 RPM
Capacity/Pressure @ 60 hz 1725 RPM
Capacity/Pressure @ 50 hz 1425 RPM
Capacity/Pressure @ 50 hz 1425 RPM
Capacity at Max pressure
Capacity at Max pressure
Capacity at Max pressure
Capacity at Max pressure
233773117185
-233773117185
-3773117185
-3773117185
-
7748241510877482415108482415108482415108
487296144
-487296144
-487296144
-
382519121038251912103825191210
406080120148406080120148406080120148
4.77
9.513.3
-101621
30.4-
27425785-
17.826.536
50.3-
37.960.679.5
115.1-
102.2159
215.7321.7
-
3.35.67.1
11.4-
4.71116
25.6-
21365179-
12.521.226.943.1
-17.841.660.696.9
-79.5136.3193299
-
1,5001,5001,5001,5001,5001,0001,0001,0001,0001,000400400400400400
103.4103.4103.4103.4103.4
6969696969
27.627.627.627.627.6
3.925.837.9211.0813.678.3313.3317.525.3331.2422.535
47.570.83
87.357
14.822.130
41.951.731.550.566.295.9118.285.2132.5179.8268.1330.6
2.754.675.929.5011.723.929.1713.3321.3326.3117.5030.0042.5065.8381.19
10.417.722.436
44.314.834.750.580.799.666.2
113.6160.9249.2307.3
1,5001,5001,5001,5001,5001,0001,0001,0001,0001,000400400400400400
103.4103.4103.4103.4103.4
6969696969
27.627.627.627.627.6
1930609615217819306096152178306096152178306096152178
0.360.731.442.323.64
-0.570.81.72.84.4-
1.83.86.29.4-
6.112.319.430.0
-
1.42.85.58.813.8
-2.23.06.410.616.7
-6.814.423.535.6
-23.146.673.4113.6
-
0.200.340.681.091.72
-0.40.61.22
3.1-
1.63.55.78.4-
5.511.218.129.0
-
0.81.32.64.16.5-
1.52.34.57.611.7
-6.113.221.631.8
-20.842.468.5
109.8-
2,0002,0002,0002,0002,000
-1,8001,8001,8001,8001,800
-925925925925
-350350350200
-
2,0002,0002,0002,0002,0002,0001,8001,8001,8001,8001,8001,800925925925925925350350350200200
137.9137.9137.9137.9137.9
-124.1124.1124.1124.1124.1
-63.863.863.863.8
-24.124.124.113.8
-
137.9137.9137.9137.9137.9137.9124.1124.1124.1124.1124.1124.163.863.863.863.863.824.124.124.113.813.8
0.300.611.201.933.033.550.480.671.422.333.674.301.503.175.177.839.175.08
10.2516.1725.0029.28
1.12.34.57.3
11.513.41.82.55.48.8
13.916.35.712
19.629.634.719.238.861.294.6
110.8
0.170.280.570.911.431.670.330.501.001.672.583.021.32.94.87.08.24.69.3
15.124.228.3
0.61.12.23.45.46.31.21.9
3.806.309.8011.405.0
11.118.026.531.017.335.357.191.5107.1
Capacities shown are for simplex. Double capacity for duplexCertain options may slightly alter the capacity or pressure ratings shown above.
Capacities shown are for simplex models. Double capacity for duplex models.Certain options may slightly alter the capacity or pressure ratings shown above.
Literature #59193.02
©2016 Milton Roy, LLC. All rights reserved.
Diameter Code
GearRatioCode
an Accudyne Industries brand
General Specifications
mROY Model A - Plastic Liquid Ends
mROY Model B - Plastic Liquid Ends
mRoyModel
mRoyModel
A
B
Plunger GearRatioCodeDiameter Code
Plunger
3/8 in9.5 mm C
D
E
F
L
R
7/8 in
22.2 mm
7/16 in11.1 mm
1-7/16 in
36.5 mm
5/8 in15.9 mm
1-1/16 in27 mm
Stroke/Minute
Stroke/Minute
60 hz1725 rpm
60 hz1725 rpm
50 hz1425 rpm
50 hz1425 rpm
Ratings at100 psi/7 bar
Ratings at100 psi/7 bar
Ratings at100 psi/7 bar
Ratings at100 psi/7 bar
gph
gph
gph
gph
gph
gph
gph
gph
l/hr
l/hr
l/hr
l/hr
l/hr
l/hr
l/hr
l/hr
psi
psi
psi
psi
bar
bar
bar
bar
Max Pressure
Max Pressure
Max Pressure
Max Pressure
Capacity
Capacity
Capacity
Capacity
Capacity/Pressure @ 60 hz 1725 RPM
Capacity/Pressure @ 60 hz 1725 RPM
Capacity/Pressure @ 50 hz 1425 RPM
Capacity/Pressure @ 50 hz 1425 RPM
Capacity at Max pressure
Capacity at Max pressure
Capacity at Max pressure
Capacity at Max pressure
23377311723377311737731173773117
7748241577482415482415482415
487296144
-487296144
-
38251912103825191210
406080120148406080120148
10.016.021.030.4
-27.042.057.085.0
-
37.960.679.5
115.1-
102.2159
215.7321.7
-
9.715.720.730.1
-26.041.056.084.0
-
36.759.478.3
113.9-
98.4155.2212
317.9-
150150150150150150150150150150
10.310.310.310.310.310.310.310.310.310.3
8.3313.3317.5025.3331.24 22.5035.0047.5070.8387.36
31.550.566.295.9
118.285.2
132.5179.8268.1330.6
8.113.117.325.1
30.9321.734.246.770.0
86.33
30.649.565.394.9117.182.0129.3176.6265.0326.8
150150150150150150150150150150
10.310.310.310.310.310.310.310.310.310.3
1930609619306096306096306096
0.320.681.352.200.50.71.52.51.63.55.65.711.318.1
1.22.65.18.31.92.65.79.56.113.221.221.642.868.5
0.280.621.302.100.450.651.42.41.53.45.55.611.218.0
1.12.34.97.91.72.55.39.15.7
12.920.821.242.468.1
150150150150150150150150150150150150150150
150150150150150150150150150150150150150150
10.310.310.310.310.310.310.310.310.310.310.310.310.310.3
10.310.310.310.310.310.310.310.310.310.310.310.310.310.3
0.270.571.131.830.420.581.252.081.332.924.674.759.4215.08
12.24.36.91.62.24.77.95
11.117.718
35.757.1
0.230.521.081.750.380.541.172.001.32.84.64.79.315.0
0.92
4.16.61.42
4.407.604.710.717.317.735.356.8
Diameter Code
GearRatioCode
Literature #59193.02
©2016 Milton Roy, LLC. All rights reserved.
SimplexDuplexSimplexDuplex
1 Ph
3 Ph
Plunger Code C,D,E,F
mRoy® Frame A B
K
1/4 HP (0.18 kW)1/3 HP (0.25 kW)1/4 HP (0.18 kW)1/3 HP (0.25 kW)
<1,000 psi/67 bar3/4 HP (0.55 kW)1 HP (0.75 kW)
1/2 HP (0.37 kW)3/4 HP (0.55 kW)
>1,000 psi/67 bar1 HP (0.75 kW)1 HP (0.75 kW)
3/4 HP (0.55 kW)1 HP (0.75 kW)
<400 psi/28 bar3/4 HP (0.55 kW)1 HP (0.75 kW)
1/2 HP (0.37 kW)3/4 HP (0.55 kW)
>400 psi/28 bar1 HP (0.75 kW)1 HP (0.75 kW)
3/4 HP (0.55 kW)1 HP (0.75 kW)
<100 psi/7 bar1 HP (0.75 kW)1 HP (0.75 kW)
3/4 HP (0.55 kW)1 HP (0.75 kW)
>100 psi/7 bar1 HP (0.75 kW)1 HP (0.75 kW)
3/4 HP (0.55 kW)1 HP (0.75 kW)
L R
Power Requirements
Includes PVC, PVDF liquid ends, and liquid ends for fluoride applicationsCapacities shown are for simplex. Double capacity for duplexCertain options may slightly alter the capacity or pressure ratings shown above.
Includes PVC, PVDF liquid ends, and liquid ends for fluoride applicationsCapacities shown are for simplex. Double capacity for duplexCertain options may slightly alter the capacity or pressure ratings shown above.
an Accudyne Industries brand
High Viscosity Option Ratings in Centipoise
DimensionsModel BModel A
With High Viscosity Option - Max FluidViscosity at Typical Conditions
(Centipoise)
Plunger Size
7/16 in.11 mm
3/8 in.9.5 mm C
D
E
F
K
L
R
5/8 in.16 mm
1-1/16 in.27 mm
19/32 in.15.1 mm
7/8 in.22.2 mm
1-7/16 in.36.5 mm
Plunger Code
Gear RatioCode
Strokes per Minute
60 hz
12,2007,5004,0002,000500500
12,2007,5004,0002,000350350
5,0002,5001,250350350
1,000500300120120
---------------
2,4001,460460250100100
2,4001,4604602501001005502201208080
13060302525
13084593939
3251861439494
10765462828
50 hz
Standard pump without high viscosityoption - Viscosity at Typical Conditions
(Centipoise)
Literature #59193.02
©2016 Milton Roy, LLC. All rights reserved.
7748241510877482415108482415108482415108382519121038251912103825191210
233773117185
-233773117185
-3773117185
-3773117185
-487296144
-487296144
-487296144
-
1930609615217819306096152178 306096152178 306096152178406080120148406080120148406080120148
Dimensions are provided for pump envelope estimates with basic options. Drawings are available for the exact configuration required.
The high viscosity option limits the pump to 350 psi (24 bar)
Simplex Front View
Duplex Front View
Simplex Front View
Duplex Front View
Simplex & Duplex Side View
A Footprint
Simplex
Duplex
Simplex & Duplex Side View
Simplex & Duplex Footprints14 1/2” (368 mm)
9” (228.6 mm)
5 3/4” (146 mm)
5 7/8” (149 mm)
2 5/8” (67 mm)
5 1/4” (133 mm)
3 1/2” (89 mm)
5 1/4” (133 mm)
5” (127 mm)
6 27/32”(173.8 mm)
3 5/16”(84.1 mm)
6 5/8”(168.3 mm)
9” (228.6 mm)
12” (305 mm)
12” (305 mm)7 1/8” (181 mm)
MAX 24”(610 mm)
MAX 24”(610 mm)
8 1/4” (209 mm) 18 3/4” (476 mm)
13 1/2” (343 mm)
Suction
Discharge
Literature #59193.02
©2016 Milton Roy, LLC. All rights reserved.
an Accudyne Industries brand
N None
1 NEMA 4 pressure switch
2 Explosion proof
3 Pressure type w/gauge only
4 Pressure type w/gauge & NEMA 4 Switch
5 Pressure type w/gauge & Ex Prf Switch
6 Double Dia with intermediate fluid no probe
7 Double Dia w/ intermediate fluid & conduct probe9 Pressure transmitter connection
N Aluminum (std)
S Stainless Steel
L Stainless Steel Locking (API)
A ECC NEMA 4 115V
B ECC NEMA 4 220V
F ECC Explosion Proof 115V
G ECC Explosion Proof 220V
M ECC Mount Only
P Pneumatic 3-15 psia
N Standard - Typically Viton
E EPDM
T Teflex
P NPT
H BSP - Horizontal
V BSP - Vertical discharge, horizontal suction
P NPT4 BSP - Vertical
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 Class 150 TYPE B1/11
N EN 1092-1 DN15 PN40 TYPE B1/11
Q EN 1759-1 DN15 Class 300 TYPE B1/11
R EN 1759-1 DN15 Class 600 TYPE B1/11
S EN 1759-1 DN15 Class 1500 TYPE B1/11
1 ANSI 1/2 Class 150 RF Thd
2 ANSI 1/2 Class 150 Plastic Slvnt wld
3 DN15 PN16 Solvent weld, Rotate Flg DIN8063
MRA 1 1 E 10 S1 A P P N S 4 N
Base
Extended code for less common options
Diaphragm Rupture Detection
Capacity Control
Gear Ratio Code
Plunger Diameter
Liquid End Material
Number of Heads
MRA
MRB
1 Simplex
2 Duplex
1 316L SS
2 PVC
5 Alloy 20
6 Hast C
7 PVDF
8 Fluoride
C 3/8” (9.5 mm)
D 7/16” (11.1 mm)
E 5/8” (15.9 mm)
F 1 1/16” (27 mm)
K 19/32” (15.1 mm)
L 7/8” (22.2 mm)
R 1 7/16” (36.5 mm)
77
48
24
15
10
08
38
25
19
12
10
There are many options based on
power and installation conditions.
Your local representative can help
select the proper option.
Frame/Range
Example Code:
O Ring Options
Discharge Connections
Suction ConnectionsSame code used for suction and discharge
Threaded - Metallic liquid ends
Threaded - Plastic Liquid Ends
Flange - Metallic liquid ends
Flange - Plastic liquid ends
Type Motor Mount
Motor or IEC/NEMA Mount
MRB Range
MRB Range
MRA Range
MRA Range
Model Selection Guide
C Close coupled
A API Flange with flexible coupling
M API Mount with special coupling
N None
Y Yes
V Special base to mount and connect VFD
(Selected and priced separately)