Cat Pumps
4DNX25GSI Cat Pressure Washer Triplex Positive Displacement Plunger Pump 3000 PSI 2.5 GPM , 4DNX Series , 3/4 inch Hollow Shaft Diameter , SAE J609 Gas Engine Flange , Block-Style Brass
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4DNX25GSI Cat Pressure Washer Triplex Positive Displacement Plunger Pump 3000 PSI 2.5 GPM , 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.
| SPECIFICATION | DETAILS |
| Model Number | 4DNX25GSI |
| Manufacturer | CAT Pumps |
| Pump Type | Triplex Plunger Pump |
| Manifold Material | Brass |
| Valve Material | 304 Stainless Steel |
| Max Flow Rate | 2.5 GPM (9.5 LPM) |
| Pressure Range | 100 - 3000 PSI |
| Test Pressure | 3000 PSI |
| Max Pump Speed | 3450 RPM |
| Inlet Port Size | 3/4" GH(F) |
| Discharge Port Size | 3/8" NPT(M) |
| Shaft Diameter | 3/4" (19.0 mm) Hollow - Gas |
| Max Liquid Temp (NBR) | 140°F (60°C) |
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