Positive Displacement

Engineered rotary gear pumps for general purpose use, pressure lubrication, fuel supply, re-circulating, fixed and mobile transfer; handling fluids to 1,000,000 SSU. Pump sizes available from 3/8″ NPT ports up to 8″ flanged. Pumps available in iron and stainless steel construction with several drive options, including magnetic drives.”A” Series pumps are available for capacities to 56 GPM and pressures to 150 PSI (300 PSI on smaller units handling clean lubricating products). Eleven pump sizes available.

“F” Series pumps for handling 1-300 GPM with pressures up to 300 PSI. Ten sizes available with port sizes ranging from 1/2″ to 2 1/2″.

“3600 Series” the work horse of the Roper product line, originally designed for the transport industry and adapted to meet the needs of the industrial market. Six sizes available from 2″ to 4″ with capacities up to 340 GPM and pressures to 125 PSI.

“Z” Series the basic design of the 3600 Series is incorporated into the versatile “Z” Series. The “Z” Series Pump offers a two-piece backplate design for flexible seal options, flanged ports. Three sizes are available for capacities up to 160 GPM and pressures to 125 PSI.

“ROC” the ROC is Roper’s latest engineered product offering; a stainless steel rotary gear pump from .01 To .18 Gal./rev. at a competitive price. Viscosities up to 100,000 SSU and pressures to 300 PSI the stainless steel pump is available with packing, mechanical seal, or mag drive.

All-Flo non-metallic and metallic air operated diaphragm pumps in a wide variety of sizes and materials, sizes from 1/4″ to 3″ and materials from polypropolene, nylon, aluminum and 316ss.

Cat Pumps are triplex, positive displacement, reciprocating, high pressure pumps. They are the most cost-effective design for achieving high efficiency and low pulsation. Although we can operate down to 1/4 GPM and 100 PSI, the majority of our applications are at much higher flows and pressures.

The output (flow) of a positive displacement pump is directly proportional to the operating RPM. If the pump RPM increases by 20%, the flow out the pump will increase by 20%. The pressure is adjusted by the amount of restriction in the discharge line, typically by a regulator or unloader, nozzle(s) or trigger gun(s) or a combination of devices.

Each Cat Pump has three synchronized piston (plunger) rods, referred to as a triplex design, delivering a smooth, consistent flow. Cat Pumps are 30-50% more efficient than most pumps and the triplex design reduces 90% of the pulsation common in all three piston (plunger) pump designs.

The Cat Pumps have been designed for continuous-duty performance. They are capable of pumping non-abrasive, moderate pH liquids including city water, filtered reclaim water, oils, cleaning solutions, pesticides, agricultural chemicals, seawater, dionized (D.I.) water, pharmaceutical products and some food products at moderate to high pressures. They are also suitable for pumping liquids at high temperature and where extremely high inlet pressure is required to maintain liquidity.

New market needs were met with the addition of new, larger capacity pumps and centrifugal pumps.

Cat Pumps acquired Ram Pumps of the U.K. adding several new frame sizes of large capacity pumps up to 660 GPM, 18,000 PSI. These pumps offer 316SSL, carbon steel, duplex alloy or hasteloy construction and meet API 674 standards required by the oil and gas market.

Since 1963, Chem/Meter pumps have been providing metering pump users with highly accurate, responsive and leak-free solutions to industry’s most demanding process and OEM applications. Designed in response to users’ needs for a higher degree of reliability, Chem/Meter delivers these solutions in highly engineered or off-the-shelf packages that incorporate the latest in electronic automated control, leak detection and modular steady flow performance. Chem/Meter offers a complete line of diaphragm metering pumps covering a full hydraulic envelope, a wide range of liquid end styles and materials of construction enabling the injection of virtually any liquid and complete set of options to accommodate any external process condition or automation requirement.

Chem/Meter delivers performance under pressure. Today Chem/Meter is the only manufacturer to have achieved the quality necessary to meet the demanding ASME® N-Stamp certification for nuclear service. This level of quality is incorporated throughout the Chem/Meter range, and is thereby offered with an industry leading two-year warranty.

Maximum Value – Minimum Size
A compact sealless pump delivery quiet, dependable metering.