P485

A German-made reciprocating triplex plunger pump.

Features:
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.

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

  • P485 Exploded View
  • P485 Parts List
  • P485 Torque Specifications
  • Giant Industries Limited Warranty
  • P485 Installation Instructions
  • P485 Repair Instructions
  • Troubleshooting Guide

SPECIFICATIONS

U.S. Metric
Max Flow 5.3 GPM 19.9 L/min
Max Discharge Pressure 7250 PSI 500 bar
Max Inlet Pressure 145 PSI 10 bar
Max Speed 1450 RPM
Plunger Diameter 0.71″ 18 mm
Stroke 0.79″ 20 mm
Max Temp 104 °F 40 ºC
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
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


HORSEPOWER SPECIFICATIONS

RPM GPM 4000 PSI 5000 PSI 6000 PSI 7250 PSI
1000 3.6 10.0 12.5 15.0 18.1
1100 4.0 11.0 13.7 16.5 19.9
1200 4.3 12.0 15.0 18.0 21.7
1300 4.7 13.0 16.2 19.4 23.5
1450 5.3 14.5 18.1 21.7 26.3

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
as HP = (GPM X PSI)/1100


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


REPAIR KITS

ITEM# PART# DESCRIPTION Qty.
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 #09648
27 05541 Valve Seat 3
28 05542 Valve Plate 3
29 07906 Valve Spring 3
30A 07492 Valve Spring Retainer 3
31 07770 O-Ring 3
Discharge Valve Assembly Kit – Part #09647
27 05541 Valve Seat 3
28 05542 Valve Plate 3
29 07906 Valve Spring 3
30 07907 Valve Spring Retainer 3
31 07770 O-Ring 3
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.

PUMP CATEGORIES:
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.