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; solid ceramic plungers; nitrile with fabric reinforcing; stainless steel valves; machined stainless steel manifold.

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

SPECIFICATIONS

U.S. Metric
Maximum Flow 18.0 GPM 68.1 L/min
Maximum Discharge Pressure 4350 PSI 300 bar
Crankshaft Speed 800 RPM
Maximum Inlet Pressure 90 PSI 6 bar
Maximum Temperature 140 °F 60 °C
Plunger Diameter 1.10″ 28 mm
Stroke 1.89″ 48 mm
Crankshaft Diameter 42 mm
Crankshaft Rotation Top of Pulley Towards Manifold
Crankshaft Mounting Either Side
Inlet Ports (2) 1-1/2″ NPT
Discharge Ports (2) 1″ NPT
Crankcase Oil Capacity 1.9 gal 4.2 L
Weight 309 lbs. 140 kg
Key Component Material
Manifold Stainless Steel
Plungers Solid Ceramic Oxide
Valves Duplex Steel
Seals Nitrile with Fabric Reinforcing
Gear End Spheroidal Cast Iron

 

Click the image to enlarge


HORSEPOWER SPECIFICATIONS

RPM GPM 1000 PSI 2000 PSI 3000 PSI 4000 PSI
400 9.0 6.4 12.9 19.3 25.7
500 11.3 8.1 16.1 24.2 32.3
600 13.5 9.6 19.3 28.9 38.6
700 15.8 11.3 22.6 33.9 45.1
800 18.0 12.9 25.7 38..6 51.4

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.