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 www.P65Warnings.ca.gov

  • P465 Exploded View
  • P465 Parts List
  • P465 Torque Specifications
  • P465 Technical Drawing
  • Giant Industries Limited Warranty
  • P465 Installation Instructions
  • P465 Repair Instructions
  • Troubleshooting Guide


U.S. Metric
Max Flow 6.3 GPM 23.9 L/min
Max Discharge Pressure 5800 PSI 400 bar
Max Inlet Pressure 145 PSI 10 bar
Max Speed 1450 RPM
Plunger Diameter 0.71″ 18 mm
Stroke 0.94″ 24 mm
Max Temp 104 °F 40 °C
Crankshaft Diameter 1.10″ 28 mm
Key Width 0.32″ 8 mm
Weight 37.5 lbs. 17 kg
Crankcase Capacity 27 fl. oz. 0.8 L
Inlet Ports (2) 1/2″ BSP
Discharge Ports (2) 3/8″ BSP
Shaft Rotation Top of Pulley Towards Manifold
Shaft Mounting Either Side
Power Required 16 BHP 16 BHP
Volumetric Efficiencty @ 1450 RPM 0.90 0.90
Mechanical Efficiency @ 1450 RPM 0.80 0.80
Key Component Material
Manifold Machined Brass
Plungers Solid Ceramic Oxide
Valves High Grade Stainless Steel
Seals Nitrile With Fabric Reinforcing
Gear End Aluminum

Click the image to enlarge


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

Horsepower Requirements

The ratings shown are the power requirements for the pump. Gas engine power outputs must be approximately twice the pump power requirements shown above.

We recommend a 1.15 service factor be specified when selecting an electric motor as the power source. To compute specific pump horsepower requirements use the following formulas:
Electric HP = (GPM X PSI)/1450
Gas HP = (GPM X PSI)/1100

*Engine power varies based on horizontal or vertical orientation, as well as by makes and models from each manufacturer.


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
Inlet 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

Repair Kits Available

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.

Service & Repair

Giant provides service on each pump and accessory that we sell. Many basic repair procedures are covered in the Giant repair manual. For all other questions on service or repair needs please contact your local Giant distributor.