Skip to main content
Featured Image for P55W

A German-made reciprocating triplex plunger pump.

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 forged brass manifold.

Gearbox and bell housings (to connect to gasoline, diesel, electric or hydraulic drive).

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
Flow4.9 GPM18.5 L/min
Maximum Discharge Pressure2320 PSI160 bar
Crankshaft Speed1420 RPM
Power7.8 HP5.8 KW
Intermittent Flow6.0 GPM22.7 L/min
Intermittent Discharge Pressure1000 PSI69 bar
Intermittent Crankshaft Speed1750 RPM
Intermittent Power Consumption4.1 HP3.1 kW
Max Temperature160 °F70 °C
Inlet Port Size(2) 1/2" NPT
Discharge Port Size(2) 3/8" NPT
Plunger Diameter0.71 in.18 mm
Stroke0.713 in.18.1 mm
Maximum Inlet Pressure145 PSI10 bar
Crankshaft Diameter24 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US12.5 fl. oz. 0.37 L
Weight17.2 lbs.7.8 kg
Volumetric Efficiency0.94
NPSHR18.0 Ft.-head5.5 mWs
Manifold Material Forged Brass
Crankcase Material Aluminum
Plunger Material Solid Ceramic Oxide
Valve Material High Grade 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 #09089
31 07011 V-Sleeve, Front 3
50 06241 Rear V-Sleeve 3
51 06242 Support Ring 3
Valve Assembly Kit – Part #09041
34 07325 Retainer, Valve Spring 6
35 06017-0100 Valve Spring 6
36 06016 Valve Plate 6
37 06014 Valve Seat 6
38 06015 O-Ring, Valve Seat 6
40 07212 O-Ring, Adapter 3
42 07214 O-Ring, Inlet Plug 3
44 07035 O-Ring, Discharge Plug 3
Oil Seal Kit – Part #09202
26 07206 Oil Seal 3

Horsepower Specifications

RPM GPM 500 PSI 1000 PSI 2000 PSI 2320 PSI
851 2.9 1.0 2.0 4.0 4.6
967 3.3 1.1 2.3 4.5 5.2
1084 3.7 1.3 2.5 5.1 5.9
1201 4.1 1.4 2.8 5.6 6.5
1317 4.5 1.5 3.1 6.2 7.2
1420 4.9 1.7 3.4 6.7 7.8
1750 6.0 2.1 4.1

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • P55W Exploded View
  • P55W Parts List
  • P55W Torque Specifications


Documents open in new window/tab.

  • Pump Assembly Instructions
  • Giant Industries Limited Warranty
  • P55W Installation Instructions
  • P55W 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.

Learn More

Join Our Newsletter

Get the latest updates from Giant Pumps delivered right to your inbox!

Subscribe to the Giant Newsletter

Back to Top