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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 machined brass manifold.

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

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
Flow6.3 GPM23.9 L/min
Maximum Discharge Pressure5800 PSI400 bar
Crankshaft Speed1450 RPM
Power25.2 HP18.8 KW
Max Temperature104 °F40 °C
Inlet Port Size(2) 1/2" BSP
Discharge Port Size(2) 3/8" BSP
Plunger Diameter0.71 in.18 mm
Stroke0.94 in.24 mm
Maximum Inlet Pressure145 PSI10 bar
Crankshaft BoreSAE 2B or SAE 4B 13T 16/32 Spline
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US27 fl. oz. 0.8 L
Weight37.5 lbs.17 kg
Volumetric Efficiency0.9
Mechanical Efficiency0.8
NPSHR0.8 Ft.-head
Manifold Material Machined 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 #09640
18 08477 Grooved Seal 3
20A 07266 O-Ring 3
23 05517 Grooved Seal Packing 3
24 05537 Support Ring 3
25A 05538 Support Ring for O-Ring 6
25B 07489 O-Ring 6
25C 05539 Border Seal Ring 2
Valve Assembly Kit – Part #09781
27A 05543 Valve Assembly 6
33 05545 O-Ring 3
Oil Seal Kit – Part #09641
19 05444 Oil Seal 3

Horsepower Specifications

RPM GPM 4000 PSI 5000 PSI 5800 PSI
1000 4.3 12.0 15.0 17.4
1100 4.8 13.2 16.4 19.1
1200 5.2 14.4 18.0 20.8
1300 5.6 15.6 19.4 22.6
1450 6.3 17.4 21.7 25.2

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • P465H Exploded View
  • P465H Parts List


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • P465H Installation Instructions
  • P465H 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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