Cat Pumps

Model 4SF - Sleeved Direct-Drive Plunger Pumps Series


Field-proven Direct-drive Plunger Pumps For Gas and Electric Pressure Washers.

  • Triplex design provides smoother liquid flow.
  • Unique spring loaded inlet valves and the flow through ceramic plungers allow excellent suction capabilities.
  • Compact, hollow shafted pump for direct mounting to either gas or electric motor, eliminates the need for pulleys, belts, gearboxes.
  • Regulating Unloader mounts directly on each pump to assure system pressure control and pump protection.
  • Convenient multiple porting provides installation flexibility.


Cat Pumps offers cost-effective solutions for your high pressure liquid pumping applications. Our product line has responded to market needs and environmental concerns. We have developed high pressure pumps with state-of-the art designs and features, such as our flushed manifolds for high temperature liquids, low lubricity liquids and high vapor liquids like CO2. Our triplex PD pump design provides high energy-efficiency, long life, low maintenance and low life-time operating costs.

Companies from all industries and markets have incorporated Cat Pumps' custom pumping systems into their operations to save money, reduce downtime, improve production, enhance product quality or ensure a safe environment. Whatever the application, we can help you find a dependable solution.

Cat Pumps are active in all commercial and industrial, civilian, military and government markets for transfer and high pressure liquid pumping applications whether pumping fresh water, DI water, wastewater, seawater, oils, chemicals, foam, liquid CO2, sanitizers, pesticides, chamicals or food products.

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