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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 stainless steel 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
Flow65.8 GPM249.1 L/min
Maximum Discharge Pressure1500 PSI100 bar
Crankshaft Speed700 RPM
Power65.7 HP49 KW
Max Temperature140 °F60 °C
Inlet Port Size(2) 2-1/2" BSP
Discharge Port Size(2) 1-1/4" BSP
Plunger Diameter2.17 in.55 mm
Stroke2.05 in.52 mm
Maximum Inlet Pressure145 PSI10 bar
Crankshaft Diameter1.89 in.48 mm
Crankshaft RotationTop of Pulley Towards Manifold
Key Width0.55 in.14 mm
Crankshaft MountingEither Side
Crankcase Oil Capacity US1.6 gal 6.0 L
Weight430 lbs.195 kg
NPSHR27.9 Ft.-head8.5 mWs
Manifold Material Stainless Steel
Crankcase Material Spheroidal Cast Iron
Plunger Material Solid Ceramic Oxide
Valve Material Stainless 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 #09609-0400
38A 13156 O-Ring 3
38B 07721 O-Ring 3
39A 07723 Compact Ring 3
41 13158 O-Ring 3
42 07711 V-Sleeve 6
43 07712-0400 Pressure Ring 3
Valve Assembly Kit – Part #09852
51B 05450 Valve Spring 6
51C 05247 Valve Plate 6
51D 05596 O-Ring 6
51E 05597 Valve Seat 6
51F 05166 O-Ring 6
56A 07658 O-Ring 3
56B 07635 Support Ring 3
56C 13166 Support Ring 3
56D 07653 O-Ring 3
Oil Seal Kit – Part #09221
32 07624 Radial Shaft Seal 3
33A 07627 O-Ring 3

Horsepower Specifications

RPM GPM 800 PSI 1000 PSI 1300 PSI 1500 PSI
479 45.0 24.8 31.0 40.4 46.6
531 49.9 27.5 34.4 44.7 51.6
585 55.0 30.4 37.9 49.3 56.9
638 60.0 33.1 41.4 53.8 62.1
700 65.8 36.3 45.4 59.0 68.1

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • GP7155-4000 Exploded View
  • GP7155-4000 Parts List
  • GP7155-4000 Torque Specifications


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • GP7155-4000 Installation Instructions
  • GP7155-4000 Repair Instructions
  • 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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