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A German-made reciprocating triplex plunger pump. Features: 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 cast aluminum bronze 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
Flow36.7 GPM139 L/min
Maximum Discharge Pressure2175 PSI150 bar
Crankshaft Speed800 RPM
Power55.0 HP41 KW
Max Temperature140 °F60 °C
Inlet Port Size(2) 2-1/2" BSP
Discharge Port Size(2) 1-1/4" BSP
Plunger Diameter1.57 in.40 mm
Stroke1.89 in.48 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Weight309 lbs.140 kg
Manifold Material Bronze
Crankcase Material Spheroidal Cast Iron
Plunger Material Solid Ceramic Oxide
Valve Material Duplex Steel
Seal Material Nitrile with Fabric Reinforcing
The repair kits listed to the right are available for this pump. If you need further information about these repair kits, or have questions about other specific parts for your pump, please contact you local Giant distributor or contact Giant customer service.
Plunger Packing Kit – Part #09622
41A 07721 O-Ring 3
41C 13141 O-Ring 3
44 12559 Sleeve 6
44A 12560 Pressure Ring 3
45 12561 Grooved Ring 3
Valve Assembly Kit – Part #09624
51A 12564 Valve Seat 6
51B 12565 Valve Plate 6
51C 12566 Valve Spring 6
52 05166 O-Ring 6
57 05167 O-Ring 6
Oil Seal Kit – Part #09625
32 06118 Radial Shaft Seal 3
33A 07721 O-Ring 3

Horsepower Specifications

RPM GPM 500 PSI 1000 PSI 1500 PSI 2175 PSI
400 18.4 6.6 13.1 19.7 28.5
500 22.9 8.2 16.4 24.6 35.6
600 27.5 9.8 19.7 29.5 42.8
700 32.1 11.5 22.9 34.4 49.9
800 36.7 13.1 26.2 39.3 57.0

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • GP6140 Torque Specifications


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  • Giant Industries Limited Warranty
  • Troubleshooting Guide

Sample Pump

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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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