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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 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
Flow15.1 GPM57.2 L/min
Maximum Discharge Pressure3600 PSI250 bar
Crankshaft Speed1000 RPM
Power37.5 HP28 KW
Max Temperature140 °F60 °C
Inlet Port Size1-1/4" BSP
Discharge Port Size1" BSP
Plunger Diameter0.94 in.24 mm
Stroke1.65 in.42 mm
Maximum Inlet Pressure145 PSI10 bar
Crankshaft Diameter35 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US95 fl. oz. 3.0 L
Weight110 lbs.50 kg
Manifold Material Aluminum Bronze
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 #09548
38 07140 O-Ring 3
38A 12055 O-Ring 3
40 06083 V-Sleeve 6
Valve Assembly Kit – Part #09196
44A 07150 O-Ring 6
44B 06266 Support Ring 3
46A 07064 Valve Seat 3
46B 07063 Valve Plate 3
46C 07750-0100 Valve Spring 3
Oil Seal Kit – Part #09577
31 07133 Oil Seal 3

Horsepower Specifications

RPM GPM 2000 PSI 2500 PSI 3000 PSI 3600 PSI
500 7.6 10.5 13.1 15.7 18.9
640 9.7 13.4 16.7 20.1 24.1
750 11.3 15.6 19.5 23.4 28.1
805 12.2 16.8 21.0 25.2 30.3
865 13.1 18.1 22.6 27.1 32.5
940 14.2 19.6 24.5 29.4 35.3
1000 15.1 20.8 26.0 31.2 37.5

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • LP400 Exploded View
  • LP400 Parts List
  • LP450 Torque Specifications


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • LP400 Installation Instructions
  • LP400 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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