GP5122

A German-made reciprocating triplex plunger pump.

Features:
Spheroidal cast iron crankcase with sight glass and vented dipstick; forged, through-hardened, ground and polished crankshaft; bronze connecting rods; hardened stainless steel plunger bases; special ceramic plungers; Aramid/Teflon packing; stainless steel valves; machined stainless steel manifold.

  • GP5122 Exploded View
  • GP5122 Parts List
  • GP5122 Torque Specifications
  • Giant Industries Limited Warranty
  • GP5122 Installation Instructions
  • GP5122 Repair Instructions
  • Troubleshooting Guide

SPECIFICATIONS

U.S. Metric
Maximum Flow 11.9 GPM 45.0 L/min
Maximum Discharge Pressure 7250 PSI 500 bar
Crankshaft Speed 930 RPM
Maximum Inlet Pressure 145 PSI 10 bar
Maximum Temperature 140 ºF 60 ºC
Plunger Diameter 0.866″ 22 mm
Stroke 1.81″ 46 mm
Crankshaft Diameter 35 mm
Crankshaft Rotation Top of Pulley Towards Manifold
Crankshaft Mounting Either Side
Inlet Port (2) 3/4″ BSP
Discharge Port (2) 1/2″ BSP
Crankcase Oil Capacity 1.2 gal 4.6 L
Weight 176 lbs. 80 kg
NPSH Required 27.9 ft.-head 8.5 mWs
Key Component Material
Manifold Stainless Steel
Plungers Special Ceramic
Valves High Grade Stainless Steel
Seals Aramid/Teflon Packing
Gear End Spheroidal Cast Iron

Click the image to enlarge


HORSEPOWER SPECIFICATIONS

RPM GPM 3625 PSI 5000 PSI 6000 PSI 7250 PSI
500 6.4 16.0 22.1 26.5 32.0
600 7.7 19.3 26.6 31.9 38.5
700 9.0 22.5 31.0 37.2 45.0
800 10.2 25.5 35.2 42.2 51.0
850 10.9 27.3 37.6 45.1 54.5
930 11.9 29.8 41.0 49.2 59.5

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 #09785
36 07023 O-Ring 3
38 07303 O-Ring 3
39 04503 Guide Ring 3
41 04504 Spiral Ring 6
44 12055 O-Ring 3
45 07693 Support Ring 3
47 06266 Support Ring 3
48 07150 O-Ring 3
Valve Assembly Kit – Part #09787
47 06266 Support Ring 3
48 07150 O-Ring 3
51 04513 Valve Assembly 6
53 05972 O-Ring 3
Oil Seal Kit – Part #09230
31 13284 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.