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PRIMEROY pumps are highly compact industrial pumps designed for high-flow, medium-pressure applications.

With their multiple built-in safety features and innovative oil-tank-free design, PRIMEROY hydraulic diaphragm metering pumps eliminate the risk of mixing mechanical and hydraulic oils for safe metering operations. Eco-designed, they are made up of few parts for quick and easy maintenance.

Why choose Primeroy Series?

Up to 871 GPH (3,300 L/h)

The PLG model delivers capacities up to 871 GPH (3,300 L/h), making it ideal for high-flow chemical injection and dosing applications. 

Up to 652 PSI (45 bar)

Designed for medium-pressure applications requiring accurate and consistent dosing performance.

±1% Accuracy

Provides repeatable dosing accuracy from 10% to 100% of nominal flow through the PRIMEROY variable eccentric drive design.

Patented GSD Technology

The Global Security Device (GSD) design incorporates triple hydraulic protection and an Installation Monitoring Indicator (IMI) for enhanced operational safety and visibility.

Leak-Proof PTFE Diaphragm Design

Hydraulically actuated PTFE diaphragms are designed for service life exceeding 20,000 hours while providing leak-free operation.

API 675 Compliant

Built to meet API 675 requirements and available with a wide range of materials, controls, certifications, and hazardous-area options.

What Makes the GSD Technology Different?

Triple Hydraulic Security

The patented GSD (Global Security Device) design provides three levels of hydraulic protection. In addition to the internal pressure relief valve, the diaphragm controls hydraulic refill and is protected against overrun and extrusion. This design helps improve reliability while protecting critical dosing applications. 

Installation Monitoring Indicator (IMI)

The integrated IMI system provides visual indication of abnormal operating conditions such as overpressure, cavitation or inadequate pulsation dampening. This helps operators identify potential issues before they impact dosing performance. 

One Oil System

Unlike designs that separate lubrication and hydraulic systems, the GSD platform uses a single oil design for both functions, eliminating the risk of oil cross-contamination while simplifying operation and maintenance.

Not Sure Which Model Fits Your Application?

Compare flow capacity, pressure capability and liquid-end technologies across the PRIMEROY portfolio to identify the best fit for your application.

 

Model

Max Flow Rate

Max Pressure

Best For

PRIMEROY PKG

659 GPH (2,500 L/h)

536 PSI (37 bar)

Compact, medium-pressure chemical dosing applications

PRIMEROY PLG

871 GPH (3,300 L/h)

652 PSI (45 bar)

Higher-capacity water treatment and industrial process applications

 

Need Help Selecting Right Pump?

Flow rate, pressure, fluid properties and application requirements all play a role in pump selection. Our team can help identify the best-fit model and configuration for your process.

FAQ

GSD (Global Security Device) is Milton Roy's patented hydraulic diaphragm design featuring triple hydraulic security, integrated diaphragm protection, and Installation Monitoring Indicator (IMI) technology for improved process reliability. 

How Can We Help You?

Work with Milton Roy experts to identify the right solution for your application, operating conditions and performance requirements