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CAT Pumps 5CP3120CSS Triplex Plunger Pump with Side Gauge - 4.5 GPM, 3500PSI, 1645 RPM

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21.50 lbs
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 5 frame plunger pump with 3 solid ceramic plungers, a brass manifold, and stainless steel valves. 3500 PSI max pressure and a 4.5 max flow rate. Has two 1/2" FNPT inlet ports and two 3/8" FNPT outlet ports.


Technical Specifications

Bore: 16 millimeter
Crankcase Capacity: 17 ounce
Max PSI: 3500
Max Temperature: 160 degrees F
Max GPM: 4.5
Stroke: 18 millimeter
Shaft Diameter: 20 millimeter
RPM: 1645
Inlet Port: 1/2 inch

Product Description

Positive Displacement Triple Plunger Pump

The CAT Pump 5CP3120CSS  Pump is a triplex style plunger pump with a forged brass manifold, 304 stainless steel valve assemblies, and Buna-N seals. This is a five frame model that can be used in applications up to 3500 PSI.

Dimensions: 10.4" x 8.6" x 5.8"


  • 4.5 GPM maximum flow rate
  • 3500 PSI maximum pressure
  • 1645 RPM
  • 1/2" FNPT inlet ports (x2)
  • 3/8" FNPT outlet ports (x2)
  • 16mm bore
  • 18mm stroke
  • 20mm shaft diameter
  • 17 oz. crankcase capacity
  • Weight: 21.50 lbs.


  • Industrial triplex design offers reliability and versatility.
  • Optional single shaft with side gauge
  • Ultra-compact direct-drive mount to motor using bell housing and flexible coupling or gas engine with
  • gearbox
  • Optional belt-drive for precision flow setting
  • Press-in seal cases and interchangeable valve assemblies for easy servicing
  • Includes side gauge

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