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A German-made triplex plunger positive displacement pump with reciprocating plungers for direct or belt drive applications.

Aluminum 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 316 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
Flow3.9 GPM14.7 L/min
Maximum Discharge Pressure2320 PSI160 bar
Crankshaft Speed1420 RPM
Power3.8 HP2.9 KW
Max Temperature160 °F70 °C
Inlet Port Size(2) 1/2" BSP
Discharge Port Size(2) 3/8" BSP
Plunger Diameter0.71 in.18 mm
Maximum Inlet Pressure29 PSI2.0 bar
Crankshaft Diameter0.97 in.24.5 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US12.5 fl. oz. 0.37 L
NPSHR18.0 Ft.-head5.5 mWs
Manifold Material 316 Stainless Steel
Crankcase Material Aluminum
Plunger Material Solid Ceramic Oxide
Valve Material 316TI 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 #09572
31 07011 V-Sleeve 3
38 06015 O-Ring, Valve Seat 3
40 07212 O-Ring, Adapter 3
42 07214 O-Ring, Manifold Plug 3
Valve Assembly Kit – Part #09041-0100
34 07325-0100 Spring Retainer 6
35 06017-0100 Valve Spring 6
36 06016-0100 Valve Plate 6
37 06014-0100 Valve Seat 6
38 06015 O-Ring, Valve Seat 6
40 07212 O-Ring, Adapter 3
42 07214 O-Ring, Manifold Plug 6
Oil Seal Kit – Part #09202
26 07206 Oil Seal 3

Horsepower Specifications

RPM GPM 500 PSI 1000 PSI 2000 PSI 2320 PSI
851 2.3 0.79 1.6 2.4 3.7
967 2.7 0.93 1.9 2.8 4.3
1084 3.0 1.0 2.1 3.1 4.8
1201 3.3 1.1 2.3 3.4 5.3
1317 3.6 1.2 2.5 3.7 5.8
1420 3.9 1.4 2.7 4.0 6.2

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • P55-5100 Exploded View
  • P55-5100 Parts List
  • P55-5100 Torque Specifications


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • P55-5100 Installation Instructions
  • P55-5100 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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