GP8148

A German-made reciprocating triplex plunger pump.

Features:
Attached gearbox; spheroidal cast iron crankcase with 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 nickel-plated Spheroidal cast iron manifold.  Comes equipped with an integrated oil cooling system.

  • GP8148 Exploded View
  • GP8148 Parts List
  • GP8148 Torque Specifications
  • Giant Industries Limited Warranty
  • GP8148 Installation Instructions
  • GP8148 Repair Instruction
  • Troubleshooting Guide

SPECIFICATIONS

U.S. Metric
Max Flow (Continuous) 56 GPM 213 L/min
Max Discharge Pressure (Continuous) 3770 PSI 260 bar
Max Speed (Continuous) 580 RPM
Inlet Pressure (with internal cooling) 29 PSI 2 bar
Inlet Pressure (with external cooling) 145 PSI 10 bar
Plunger Diameter 1.89″ 48 mm
Stroke 2.83″ 72 mm
Max Temp @ 1000 RPM 86 °F 30 °C
Crankshaft Diameter 45 mm
Crankcase Capacity 4.2 gal 16.0 L
Weight 767 lbs. 348 kg
Inlet Ports (2) 3″ BSP
Discharge Ports (2) 1-1/4″ BSP
Shaft Rotation Top of Pulley Towards Manifold
Shaft Mounting Either Side
Key Component Material
Manifold Cast Iron Manifold
Plungers Solid Ceramic Plungers
Valves Stainless Steel Valves
Seals Nitrile Seals with Fabric Reinforcing
Gear End Cast Iron Crankcase

Click the image to enlarge


HORSEPOWER SPECIFICATIONS

RPM GPM 1000 PSI 2000 PSI 3000 PSI 3770 PSI
300 29 20.0 40.0 59.9 75.3
400 38.6 26.6 53.3 79.9 100.4
500 48.3 33.3 66.6 99.9 125.5
56 38.6 77.2 115.9 145.6 115.9

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 #09627
38A 05387 O-Ring 6
39A 05066 O-Ring 3
40 05390 Seal Ring 3
42 05393 Sleeve 9
Inlet Valve Assembly Kit – Part #09725
51B 05978 Suction Valve Seat 3
51C 05314 Valve Plate 3
51D 05408 O-Ring 3
51E 05450 Valve Spring 3
51F 05596 O-Ring 3
52D 05408 O-Ring 3
Large Discharge Kit – Part#09726*
52B 05979 Discharge Valve Seat 3
52C 05314 Vavle Plate 3
52D 05408 O-Ring 6
52E 05450 Valve Spring 3
52F 05596 O-Ring 3
* Since the discharge valve seat has two sides, you might be able to order kit # 09726A instead of the 09726
Discharge Valve Kit – Part#09726A
52C 06314 Valve Plate 3
52D 05408 O-ring 6
52E 05450 Valve Spring 3
52F 05596 Valve Spring 3
Oil Seal Kit – Part #09584
32 05058 Radial Shaft Seal 3
33A 05056 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.