GP6128

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; stainless plungers with hardened metal coating; nitrile with fabric reinforcing; stainless steel valves; machined stainless steel manifold.

  • GP6128 Exploded View
  • GP6128 Torque Specifications
  • Giant Industries Limited Warranty
  • GP6128 Installation Instructions
  • GP6128 Repair Instructions
  • Troubleshooting

SPECIFICATIONS

U.S. Metric
800 RPM
Max Flow (Continuous) 18.0 GPM 68.1 L/min
Max Discharge Pressure (Continuous) 4000 PSI 300 bar
Inlet Pressure 90 PSI 6 bar
Plunger Diameter 1.10″ 28 mm
Stroke 1.89″ 48 mm
Max Temp @ 1000 RPM 140 °F 60 °C
Crankshaft Diameter 42 mm
Crankcase Capacity 1.9 gal 4.2 L
Weight 309 lbs. 140 kg
Inlet Ports (2) 1-1/2″ NPT
Discharge Ports (2) 1″ NPT
Shaft Rotation Top of Pulley Towards Manifold
Shaft Mounting Either Side

 

Click the image to enlarge


HORSEPOWER SPECIFICATIONS

RPM GPM 1000 PSI 2000 PSI 3000 PSI 4000 PSI
400 18.0 6.2 12.4 18.6 24.8
500 15.8 7.8 15.6 24.2 31.1
600 13.5 9.3 18.6 27.9 37.2
700 11.3 10.9 21.8 32.7 43.5
800 9.0 12.4 24.9 37.2 49.6

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 #09302
41A 07721 O-Ring 3
41B 13223 Support Ring 3
41C 12055 O-Ring 3
41D 07693  Support Ring 3
44 13369 V-Sleeve 6
45 13228 Leakage Seal 3
Valve Assembly Kit – Part #09303
51A 07064 Valve Seat 6
51B 07063 Valve Plate 6
51C 07062 Valve Spring 6
56A 07150 O-Ring 12
56B 06266 Support Ring 3
Oil Seal Kit – Part #09304
32 06118 Radial Shaft Seal 3
32A 13215 Grooved Ring 3
33A 07721 O-Ring 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.