P425

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 forged brass manifold.

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

  • P425 Exploded View
  • P425 Parts List
  • P425 Torque Specifications
  • Giant Industries Limited Warranty
  • P425 Installation Instructions
  • P425 Repair Instructions
  • Troubleshooting Guide

SPECIFICATIONS

U.S. Metric
Flow 10.7 GPM 40.4 L/min
Maximum Discharge Pressure 2465 PSI 170 bar
Crankshaft Speed 1450 RPM
Maximum Inlet Pressure 145 PSI 10 bar
Maximum Temperature 160 °F 70 °C
Plunger Diameter 0.98″ 25 mm
Stroke 0.79″ 20 mm
Crankshaft Diameter 28 mm
Crankshaft Rotation Top of Pulley Towards Manifold
Key Width 0.315″ 8 mm
Crankshaft Mounting Either Side
Inlet Ports (2) 1″ NPT
Discharge Ports (2) 3/4″ NPT
Crankcase Oil Capacity 30.4 fl. oz. 0.9 L
Weight 38.3 lbs. 17.4 kg
NPSHR 26.2 Ft.-Head 8.0 mWs
Volumetric Efficiency @ 1450 RPM 0.95
Menhanical Efficiency @ 1450 RPM 0.83
Key Component Material
Manifold Forged 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 1000 PSI 1500 PSI 2000 PSI 2465 PSI
750 5.6 3.8 5.7 7.6 9.4
900 6.7 4.6 6.9 9.1 11.3
1010 7.5 5.2 7.7 10.2 12.7
1120 8.3 5.7 8.6 11.4 14.1
1240 9.2 6.3 9.5 12.6 15.6
1450 10.7 7.4 11.1 14.7 18.2

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
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 Kits – Part #09140
21 07266 O-Ring 3
23 12254 V-Sleeve 3
23B 12255 Weep Seal 3
24 08376 Pressure Ring 6
Valve Assembly Kit – Part #09143
27A 08408 Valve Assembly, Complete 6
33 07214 O-Ring 6
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.