4DNX25GSI Cat Pressure Washer Pump 3000 PSI 2.5 GPM Triplex Positive Displacement Plunger , 4DNX Series , 3/4 inch Hollow Shaft Diameter , SAE J609 Gas Engine Flange , Block-Style Brass

CAT Pumps 4DNX25GSI 4DNX-Series Plunger Pump

The CAT Pumps 4DNX25GSI is a highly durable, industrial-duty direct-drive triplex plunger pump belonging to the reliable 4DNX Series. Engineered specifically for high-pressure fluid transfer, this positive displacement pump features a robust brass manifold paired with 304 stainless steel stacked valve assemblies. This high-strength construction provides exceptional structural integrity and wear resistance, making it an optimal choice for rigorous, intermittent-duty applications such as mobile commercial cleaning and gasoline-engine driven pressure washing systems.

Designed to maximize operational efficiency and minimize installation complexity, the 4DNX25GSI operates at a consistent flow rate of 2.5 GPM with a maximum pressure capacity of 3000 PSI at 3450 RPM. It utilizes advanced solid ceramic plungers that provide a true, low-friction wear surface, significantly extending the life of the standard NBR (Buna-N) seals and O-rings. The pump features an ultra-compact, 3/4-inch hollow shaft configuration designed to bolt directly to a standard gas engine flange, eliminating the need for external belts or pulleys. Equipped with an integral pressure regulating unloader, a built-in bypass, and a fixed chemical injector, this pump delivers the precise system control and continuous power required for high-demand surface cleaning.