PRIMEROYAL® Series Metering Pumps

PRIMEROYAL® Series Metering Pumps

Reliable and versatile metering pumps for critical chemical dosing applications
Primeroyal series pumps combine robust, field-proven technology, flexible design, and chemical delivery accuracy, making these metering pumps suitable for a large number of industrial processes.

The pumps feature a variable eccentric drive that enables precise control of the pump delivery rate while meeting or exceeding industry standards for steady-state accuracy and repeatability. It has an efficient design that achieves reliable performance within a minimal footprint.

Our latest innovation to the series is the Primeroyal X metering pump. It has been designed to provide accuracy in the even most challenging environments up to 20,000 psi (1,372 bar).


Built to API 675 standards, these pumps provide maximum performance in a minimal footprint.
Compact, variable eccentric drive. They feature a variable eccentric drive with a no-lost-motion design. This drive enables precise control of the pump delivery rate while meeting or exceeding industry standards for steady-state accuracy and repeatability.

Modular design. Milton Roy Primeroyal pumps are an integrated pump system that can be precisely configured for your application. There are five frame sizes with a wide flow rate and pressure range, a selection of packed plunger, PTFE and metallic diaphragm liquid end types, and the capability for multiplexing in any combination of frame sizes.


The Primeroyal are available in five frame sizes with a wide range of flow rates and pressures to precisely configure the pump for your application.

– Flow rate: from 0.05 gph (0.2 l/h) to 4,136 gph (15.66 m3/h) in simplex configuration
– Pressure: up to 20,000 psi (1,379 bar)
– Multiplexable
– Accuracy: ±1%, even for low flow rates and high pressures
– Stroke adjustment: from 0 to 100% of nominal flow rate
Explosion-proof version: conforming to ATEX CE EX II 2 G/D c T3 or T4 upon request


Primeroyal series pumps are ideal for critical processing industries.
Oil and Gas. Primeroyal pumps can be used in upstream, midstream and downstream sectors as well as produced water treatment. These pumps can be used for the injection of methanol, corrosion inhibitors, sodium hypochlorite, scale inhibitors, oxygen reducing agents, and many more.

Chemical and Petrochemical Processing. Dosing catalysts for polymerization of polyethylene is a prime use for the Primeroyal and Primeroy pumps.

Power Generation. High-pressure boiler feed water treatment is essential to operations and these pumps can assure accurate, efficient dosing of the necessary chemical agents.

Water / Wastewater Treatment:
Municipal (drinking) water treatment – disinfection, fluoridation, coagulation /flocculation, pH control, water conditioning before and / or after RO treatment in desalination plant, and more.

Industrial water treatment – protection of installed equipment such as boiler and hydraulic systems to prevent scale and corrosion.










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