GP7122

A German-made reciprocating triplex plunger pump.

Features:
Spheroidal cast iron crankcase with vented dipstick; forged, through-hardened, ground and polished crankshaft; bronze connecting rods; hardened stainless steel plunger bases; stainless plungers with hardened metal coating; aramid packing; stainless steel valves and machined stainless steel manifold.

  • GP7122 Exploded View
  • GP7122 Parts List
  • GP7122 Torque Specifications
  • Giant Industries Limited Warranty
  • GP7122 Installation Instructions
  • GP7122 Repair Instructions
  • Troubleshooting Guide

SPECIFICATIONS

U.S. Metric
Flow 9.9 GPM 37.5 L/min
Maximum Discharge Pressure 10,150 PSI 700 bar
Crankshaft Speed 750 RPM
Maximum Inlet Pressure 145 PSI 10 bar
Maximum Temperature 140 °F 60 °C
Plunger Diameter 0.87″ 22 mm
Stroke 2.05″ 52 mm
Crankshaft Diameter 48 mm
Crankshaft Rotation Top of Pulley Towards Manifold
Key Width 14 mm
Crankshaft Mounting Either Side
Inlet Ports (2) 1-1/4″ BSP
Discharge Ports (2) 3/4″ BSP
Crankcase Oil Capacity 1.6 gal 6.0 L
Weight 375 lbs. 170 kg
Volumetric Efficiency @ 750 RPM 89%
Mechanical Efficiency @ 750 RPM 83%
Key Component Material
 Manifold Stainless Steel
 Plungers Stainless Steel with Hardened Metal  Coating
 Valves Stainless Steel
 Seals Aramid Packing
 Gear End Spheroidal Cast Iron

Click the image to enlarge


HORSEPOWER SPECIFICATIONS

RPM GPM 3000 PSI 5000 PSI 7000 PSI 9000 PSI 10,500 PSI
300 4.0 8.6 14.3 20.0 25.7 29.0
400 5.3 11.4 18.9 26.5 34.1 38.4
550 7.3 15.6 26.1 36.5 46.9 52.9
600 7.9 16.9 28.2 39.5 50.8 57.3
650 8.6 18.4 30.7 43.0 55.3 62.4
700  9.2 19.7 32.9 46.0 59.1 66.7
750 9.9 21.2 35.4 49.5 63.6 71.8

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 #09701
38B 06750 Leakage Seal 3
38C 06667 O-Ring 3
39A 05523 O-Ring 6
42 06754 Spiral Ring (packing) 6
43 06755 Support Ring 6
44 06756 Guide Ring 3
46 13390 Seal Ring 3
Inlet Valve Assembly Kit – Part #09702
51B 05193 O-Ring 2
51C 05194 Inlet Valve Seat 1
51D 06761 Valve Plate 1
51E 05762 Valve Spring 1
58A 07770 O-Ring 1
58B 07693 Support Ring 1
Discharge Valve Assembly Kit – Part #09703
51B 05193 O-Ring 1
51D 06761 Valve Plate 1
51E 06762 Valve Spring 1
52C 05195 Discharge Valve Seat 1
58A 07770 O-Ring 1
58B 07693 Support Ring 1
Oil Seal Kit – Part #09221
32 07624 Radial Shaft Seal 3
33A 07627 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.