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A German-made reciprocating triplex plunger pump.

Spheroidal cast iron crankcase with sight glass and vented dipstick; forged, through-hardened, ground and polished crankshaft; bronze connecting rods; hardened stainless steel plunger bases; solid ceramic plungers; nitrile seals with fabric reinforcing; stainless steel valves and nickel-plated Spheroidal cast iron manifold.  Comes equipped with an integrated oil cooling system.

WARNING: This product might contain a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to

Specification US Metric
Flow84.5 GPM320 L/min
Maximum Discharge Pressure2000 PSI140 bar
Crankshaft Speed800 RPM
Power116.6 HP87 KW
Max Temperature86 °F30 °C
Inlet Port Size(2) 2-1/4" NPT
Discharge Port Size(2) 1-1/4" NPT
Plunger Diameter2.17 in.55 mm
Stroke2.17 in.58 mm
Maximum Inlet Pressure90 PSI6 bar
Crankshaft Diameter1.38 in.35 mm
Crankshaft RotationPinion Shaft Towards Back of Pump
Crankshaft MountingEither Side
Crankcase Oil Capacity2.1 gal 8.0 L
Weight469 lbs.213 kg

Horsepower Specifications

RPM GPM 500 PSI 1000 PSI 1500 PSI 2000 PSI
400 42.3 14.6 29.2 43.8 58.3
500 52.8 18.2 36.4 54.6 72.8
600 63.4 21.9 43.7 65.6 87.5
700 73.9 25.5 51.0 76.5 101.9
800 84.5 29.1 58.3 87.4 116.6

Specification Images

Additional Drawings

  • GP7655GB Exploded View
  • GP7655GB Parts List


  • Giant Industries Limited Warranty
  • GP7655GB Installation Instructions
  • GP7655GB Repair Instructions
  • Troubleshooting Guide


Sample Pump

Our Company

For 50 years, Giant Pumps has offered the most dependable positive displacement high-pressure triplex pumps available. Designed and built to the highest quality standards, customers count on Giant Pumps products to keep their equipment running. Every design detail of Giant Pumps products is optimized for long-life and reliable performance, making Giant Pumps the most trusted name in high-pressure pumps and systems.

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