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Cat 45G1 Triplex Plunger Pump with Gearbox - 4.5 GPM, 3500 PSI, 1645 RPM

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30.80 lbs
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This steel triplex plunger pump is specially formulated with V-packings that offer unmatched performance and seal life! This CAT 45 model includes a gearbox.

Technical Specifications

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

Product Description

3500 PSI Triplex Style Pump with Gearbox

The CAT Pumps 45G1 model is a triplex design plunger pump with a 304 stainless steel housing, solid ceramic plungers, and a forged brass manifold that is strong and corrosion-resistant. CAT triplex pumps are precisely engineered and designed for smoother liquid flow, extended life, and unmatched durability - even at high pressure levels.

This triplex model includes 1/2" female NPT inlet ports, 3/8" female NPT outlet ports, and includes a gearbox. Use this strong, high-efficiency triplex pump for car wash systems, desalination, chemical injection, and more!

  • 4.5 GPM maximum flow rate
  • 3500 PSI maximum pressure rating
  • 1645 RPM maximum pump speed
  • 160° Fahrenheit maximum liquid temperature
  • Bore: .630" (16 millimeter)
  • Stroke: .708" (18 millimeter)
  • Crankcase Capacity: 18 oz.
  • 1/2" NPTF inlet ports (2)
  • 3/8" NPTF discharge ports (2)


  • 11.99" X 8.54" X 5.5"


Superior Design:

  • Triplex plunger design gives smoother liquid flow.
  • V-Packings are completely lubricated and cooled by the liquid being pumped.
  • Lubricated Lo-Pressure seals provide double protection against external leakage.
  • Oil bath crankcase assures optimum lubrication.
  • Close tolerance concentricity of the ceramic plunger maximizes seal life.
  • Gearbox pump version for direct mounting to gas engine.

Quality Materials:

  • Precision design 304 stainless steel valves and seats are hardened and polished for ultimate seating and extended valve life.
  • Forged brass manifold for strength and corrosion resistance.
  • Special concentric, high-density, polished, solid ceramic plungers provide a true wear surface and extended seal life.
  • Specially formulated, CAT PUMP exclusive, V-Packings offer unmatched performance and seal life.
  • Die cast aluminum crankcase provides high strength, minimum weight and precision tolerance control.
  • Chrome-moly crankshaft gives unmatched strength and surface hardness.
  • Oversized crankshaft bearings with greater loading capacity means longer bearing life.

Easy Maintenance:

  • Wet-end easily serviced without entering crankcase.
  • Valve assemblies are accessible without disturbing piping.
  • Interchangeable inlet and discharge valve assemblies.
  • Preset seals require no packing adjustment.

Triplex Plunger Pump Applications:

  • Car Washes
  • Hydrostatic Pressure Testing
  • Desalination
  • Chemical Injection
  • Industrial Machine Part Cooling
  • Fire Suppression

Other Versions of this Triplex Pump Model:

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