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mRoy MRA Series | Critical Process Control

The mRoy Series A metering pump delivers precise, controlled-volume chemical dosing with a hydraulically-actuated PTFE diaphragm. Compact yet powerful, it ensures reliable, year-round performance with minimal maintenance. It's built to global standards and offers decades of durability for a wide range of fluid applications.

  • Material (liquid end): 316SS / Alloy 20 / Alloy C22 / Titanium / PVC / PVDF
  • Pressure max: 3,000 psi / 137.9 bar (metallic liquid end); 150.3 psi / 10 bar (plastic liquid end)
  • Flow max: 30 gph / 113.6 lph (metallic liquid end); 18.1 gph / 68.5 lph (plastic liquid end)
  • Multiplex: Duplex only
  • Flow variation control: Manual / Remote
  • >Certifications: API 675, ATEX

Long-Life PTFE Diaphragm

Hydraulically balanced PTFE diaphragm delivers up to 96,000 hours of reliable, seal-free operation.

Seal-Free Maintenance

Eliminates plunger packing, reducing maintenance requirements and lowering lifecycle costs.

Quick Start Commissioning

Liquid end bleed system ensures simple setup and faster commissioning.

Smooth Drive Performance

Worm and pinion drive in an oil bath provides quiet, efficient operation and extended service life.

Rugged Construction

Dust-tight cast iron housing ensures durability even in harsh industrial environments.

Accurate Flow Adjustment

Micrometer capacity control allows precise and repeatable dosing rates.

Built-In Safety Protection

Internal hydraulic pressure relief valve protects against overpressure conditions.

Advanced Valve Technology

High-performance cartridge-type check valves ensure tight sealing and dependable performance.

Versatile Industrial Applications

Suitable for chemical injection across water treatment, oil & gas, power, pharmaceuticals, and agriculture.

mROY® Model A - Metallic Liquid Ends

 

Plunger

Gear Ratio Code 

Stroke/Minute

Capacity/Pressure @ 60 hz 1725 RPM

Capacity/Pressure @ 50 hz 1425 RPM

Ratings at 100 psi/7 bar

Capacity at Max pressure

Ratings at 100 psi/7 bar

Capacity at Max pressure

Diameter

Code

60 hz
1725 rpm 

50 hz
1425 rpm 

Capacity

Max Pressure

Capacity

Max Pressure

gph

l/hr

gph

l/hr

psi

bar

gph

l/hr

gph

l/hr

psi

bar

3/8 in

9.5 mm

H

77

23

19

0.35

1.3

0.19 

0.7

3,000

206.9

0.29

1.1

0.16

0.6

3,000

206.9

48

37

30

0.69

2.6

0.39

1.5

3,000

206.9

0.58

2.2

0.33

1.2

3,000

206.9

24

73

60

1.39

5.3 

0.65

2.5

3,000

206.9

1.16

4.4

0.54

2

3,000

206.9

15

117

96

2.25

8.5

1.04

3.9

3,000

206.9

1.88

7.1

0.87

3.3

3,000

206.9

10

185

152

3.53

13.4

1.63

6.2

3,000

206.9

2.94

11.1

1.36

5.1

3,000

206.9

3/8 in

9.5 mm

C

77

23

19

0.36

1.4

0.20

0.8

2,000

137.9

0.30

1.1

0.17

0.6

2,000

137.9

48

37

30

0.73

2.8

0.34

1.3

2,000

137.9

0.61

2.3

0.28

1.1

2,000

137.9

24

73

60

1.44

5.5

0.68

2.6

2,000

137.9

1.20

4.5

0.57

2.2

2,000

137.9

15

117

96

2.32

8.8

1.09

4.1

2,000

137.9

1.93

7.3

0.91

3.4

2,000

137.9

10

185

152

3.64

13.8 

1.72

6.5

2,000

137.9

3.03

11.5

1.43

5.4

2,000

137.9

8

-

178

-

-

-

-

-

-

3.55

13.4

1.67

6.3

2,000

137.9

7/16 in

11.1 mm

D

77

23

19

0.57

2.2

0.4

1.5

1,800 

124.1

0.48

1.8

0.33

1.2

1,800

124.1

48

37

30

0.8

3.0

0.6

2.3

1,800 

124.1

0.67

2.5

0.50

1.9

1,800

124.1

24

73

60

1.7

6.4

1.2

4.5

1,800 

124.1

1.42

5.4

1.00

3.80

1,800

124.1

15

117

96

2.8

10.6

2

7.6

1,800 

124.1

2.33

8.8

1.67

6.30

1,800

124.1

10

185

152

4.4

16.7

3.1

11.7

1,800 

124.1

3.67

13.9

2.58

9.80

1,800

124.1

8

-

178

-

-

-

-

-

-

4.30

16.3

3.02

11.40

1,800

124.1

5/8 in

15.9 mm

E

48

37

30

1.8

6.8

1.4

5.31

925

63.8

1.50

5.7

1.2

4.4

925

63.8

24

73

60

3.8

14.4

3.1

1.7

925

63.8

3.17

12

2.6

9.8

925

63.8

15

117

96

6.2

23.5

5.1

19.3

925

63.8

5.17

19.6

4.3

16.6

925

63.8

10

185

152

9.4

35.6

7.7

29.1

925

63.8

7.83

29.6

6.4

24.3

925

63.8

8

-

178

-

-

-

-

-

-

9.17

34.7

7.5

28.5

925

63.8

1-1/16 in

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

Capacities shown are for simplex. Double capacity for duplex

Certain options may slightly alter the capacity or pressure ratings shown above.

mROY® Model A - Plastic Liquid Ends

 

Plunger

Gear Ratio Code 

Stroke/Minute

Capacity/Pressure @ 60 hz 1725 RPM

Capacity/Pressure @ 50 hz 1425 RPM

Ratings at 100 psi/7 bar

Capacity at Max pressure

Ratings at 100 psi/7 bar

Capacity at Max pressure

Diameter

Code

60 hz
1725 rpm 

50 hz
1425 rpm 

Capacity

Max Pressure

Capacity

Max Pressure

gph

l/hr

gph

l/hr

psi

bar

gph

l/hr

gph

l/hr

psi

bar

3/8 in

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 in

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

177

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 in

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 in

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

Includes PVC, PVDF liquid ends, and liquid ends for fluoride applications

Capacities shown are for simplex. Double capacity for duplex

Certain options may slightly alter the capacity or pressure ratings shown above.

Power Requirements

 

mRoy® Frame

A

Plunger Code

H

C, D, E, F

1 Ph

Simplex

1/3 HP (0.25 kW)

1/4 HP (0.18 kW)

Duplex 

-

1/3 HP (0.25 kW)

3 Ph

Simplex

1/3 HP (0.25 kW)

1/4 HP (0.18) kW

Duplex 

-

1/3 HP (0.25 kW)

 

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Model A

Dimensions are provided for pump envelope estimates with basic options.  

Drawings are available for the exact configuration required.

mroy-mra-image-dimension

mRoy Data Sheet.pdf

4.2 MB, PDF
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54814_EN (1).pdf

542 KB, PDF
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MR_ENG_54649.pdf

14 MB, PDF
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54649 Global mRoy A&B Manual.pdf

17 MB, PDF
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IOM_ACC-_1602101001_EN.pdf

1.1 MB, PDF
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53867 - mROY Diaphragm Rupture Detection.pdf

623 KB, PDF
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53870_Electronic-Capacity-Control.pdf

3.5 MB, PDF
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339-0077-000-Metallic-Diaphragm-Liquid-End IOM (1).pdf

584 KB, PDF
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53871_mROY-Pneumatic-Capacity-Control IOM.pdf

2.1 MB, PDF
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MR-En-Brochure-chemical-metering-pump-mroy-series.pdf

5.1 MB, PDF
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MR-En-Brochure-global-water-brochure.pdf

3.8 MB, PDF
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Milton Roy, mROY Chemical Metering Pump

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