Fluid handling, regulation and control

Fluid handling, regulation and control

Fluid handling, regulation and control

Milton Roy – mRoy


The mROY is one of the most popular dosing pumps in the world. Created in 1959, and enhanced and improved over the years, it is known for its high performance, reliability and durability (service lives in excess of 30 years regularly observed on site), which have made it an industry standard.
With its flow rate/pressure characteristics and its very compact footprint, the mROY® dosing pump meets the requirements of numerous processes and applications.
Its many advantages explain why so many customers choose it for integrating the most complex dosing systems (chemical injection packages).


  • Flow rate up to 66 l/h for XA and 310 l/h for XB
  • Pressure up to 123 bar for XA and 105 bar for XB
  • Maximum temperature of pumped liquid:

+90 °C for metallic liquid end

+50 °C for plastic liquid end

  • Adjustment of flow rate while running or stopped: from 0 to 100%
  • Accuracy: ± 1% of rated flow from 10% to 100% stroke
  • Oil bath lubricated
  • Cast iron housing
  • Internal safety valve
  • For pressures between 10 bar and the maximum discharge pressure of the pump, capacities will decrease by approx. 2% for every 10 bar increase. Accuracy is not affected
  • Maximum suction pressure condition:

35 bar: for plungers Ø 11.1 (XA) and Ø 15 (XB)

17.5 bar: for plungers Ø 15.9 (XA) and Ø 22.2 (XB)

9 bar: for plunger Ø 22.2 (XA)

6 bar: for plungers Ø 27 (XA) and Ø 36.5 (XB)

  • Working life of the diaphragm can exceed 20,000 hours depending on the pumped fluid, working conditions and installation
  • Compact duplex version, with 2 heads of identical or different performance and construction
  • Can comply with API 675
  • Explosion-proof version is in accordance with ATEX CE II 2 G/D c T5


  • Refineries: Injection of additives into fuels from refineries
  • Pulp and paper: Injection of dyes into paper pulp, injection of hydrogen peroxide for bleaching paper pulp
  • Treatment of boiler water: High-pressure dosing of corrosion inhibitors
  • Desalination: Injection of biocides to eliminate algae, injection of scale inhibitors to prevent scaling of membranes
  • Water treatment in dangerous atmospheres: Clarifying agents, polyelectrolytes, surfactants, sulphuric acid and pH adjustment


  • Materials compliant with offshore use of the pump
  • Liquid end materials on request
  • Sandstorm protection
  • Motor for frequency variation, NEMA mounting, explosion-proof, for specific ambient temperatures
  • Screw or flange connections (ANSI, DIN or ISO)
  • Special check valves for all types of fluid (including concentrated sulphuric acid)
  • Electronic or pneumatic actuators
  • Stroke counter
  • Possibility of duplexing (without power derating) and a reduced footprint
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