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CAT Pumps 4DNX27GSI Direct Drive Triplex Plunger Pump - 2.7GPM, 3000 PSI, 3450 RPM

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11.40 lbs
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Hollow shaft for mounting to gas engines. Smooth liquid flow provided by the triplex design. Stacked valve design allows for easy servicing.

Technical Specifications

Max PSI: 3000
RPM: 3450
Bore: 14 millimeter
Crankcase Capacity: 8.5 oz.
Inlet Port: 3/4 inch
Max GPM: 2.7
Max Temperature: 140 degrees F
Shaft Diameter: 3/4 inch
Stroke: 7.2 millimeter

Product Description

Direct Drive Pump

Designed with an integral pressure unloader with a by-pass system to for system pressure control and protection of the pump. Features a fixed injector for cleaning flexibility. Utilizes a compact hollow shaft design to directly mount with a gas engine. Includes a garden hose fitting for easy inlet connections.

Technical Specifications:

  • Flow 2.7 GPM 
  • Max. Discharge Pressure: 3000 PSI 
  • Max. RPM: 3450 
  • Stroke: 0.280" 
  • Inlet Pressure Range: Flooded to 60 PSI 
  • Bore: 0.551" - 14 mm 
  • Crankcase Capacity - 8.5 oz. 
  • Max. Liquid Temperature: 140° F
  • Inlet Port (1): 3/4" GHF
  • Accessory Port (1): (Inlet) 1/4" NPT(F)
  • Discharge Port w/ Chemical Injector: 3/8" NPT(M)
  • Chemical Injection Hose Barb: 1/4"
  • Shaft Diameter (Hollow): 3/4"
  • Weight: 10.7 lbs.
  • Dimensions: 8.03 x 7.73 x 6.51"


  • Triplex plunger design provides a smooth liquid flow 
  • Fixed chemical injector standard on all units offers cleaning flexibility 
  • Integral Pressure Unloader with built-in by-pass standard on all units to assure system pressure control and pump protection 
  • Specially formulated high-pressure seals and concentric solid ceramic plungers assure true wear surface and long seal life 
  • Stacked valve design for ease in servicing 
  • Ultra-compact, hollow-shafted pump for direct mounting to gas engine 
  • Swivel garden hose fitting for easy inlet connection

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