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A German-made reciprocating triplex plunger pump.

Attached gearbox; spheroidal cast iron crankcase with 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.

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
Flow47.5 GPM180 L/min
Maximum Discharge Pressure2000 PSI140 bar
Crankshaft Speed750 RPM
Power65.5 HP48.8 KW
Crankshaft Speed (High)60 RPM
Intermittent Flow60 GPM227 L/min
Intermittent Discharge Pressure3000 PSI200 bar
Intermittent Crankshaft Speed947 RPM
Intermittent Power Consumption124.1 HP92.5 HP
Max Temperature140 °F60 °C
Inlet Port Size(2) 2-1/2" NPT
Discharge Port Size(2) 1-1/4" NPT
Plunger Diameter1.77 in.45 mm
Stroke1.77 in.52 mm
Maximum Inlet Pressure145 PSI10 bar
Crankshaft Diameter48 mm
Crankshaft RotationTop of Pulley Towards Manifold
Key Width0.55 in.14 mm
Crankshaft MountingEither Side
Crankcase Oil Capacity1.7 gal 6.3 L
Weight418 lbs.190 kg

Horsepower Specifications

RPM GPM 800 PSI 1000 PSI 1500 PSI 2000 PSI 3000 PSI*
300 19.0 10.5 13.1 19.7 26.2 39.3*
400 25.3 14.0 17.4 26.2 34.9 52.3*
500 31.7 17.5 21.9 32.8 43.7 65.6*
600 38.0 21.0 26.2 39.3 52.4 78.6*
750 47.5 26.2 32.8 49.1 65.5 98.3*
789 50.0 27.6 34.5 51.7 69.0 103.4*
947* 60.0* 33.1* 41.4* 62.1* 82.8* 124.1*

*Intermittent Duty Only

Specification Images

Additional Drawings

  • GP7145GB Exlpoded View
  • GP7145GB Parts List


  • Giant Industries Limited Warranty
  • GP7145GB Installation Instructions
  • GP7145GB 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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