LP255

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 seals with fabric reinforcing; stainless steel valves and forged brass manifold.

  • LP255 Exploded View
  • LP255 Parts List
  • Giant Industries Limited Warranty
  • LP255 Installation Instructions
  • LP255 Parts List
  • Troubleshooting Guide

SPECIFICATIONS

U.S. Metric
Max Flow (Continuous) 26.0 GPM 98 L/min
Max Discharge Pressure (Continuous) 2175 PSI 150 bar
Max Speed (Continuous) 1000 RPM
Inlet Pressure 90 PSI 6.2 bar
Plunger Diameter 1.26″ 32mm
Stroke 1.65″ 42 mm
Max Temp 140 °F 60 °C
Crankshaft Diameter 1.38″ 35 mm
Crankcase Capacity 116 fl. oz. 3.43 L
Weight 125 lbs. 57 kg
Inlet Ports (2) 1-1/2″ NPT
Discharge Ports (2) 1″ NPT
Shaft Rotation Top of Pulley Towards Manifold
Shaft Mounting Either Side
Volumetric Efficiency @ 800 RPM 0.96 0.96
Mechanical Efficiency @ 800 RPM 0.85 0.85
Key Component Material
Manifold Aluminum Bronze
Plungers Solid Ceramic Oxide
Valves Stainless Steel
Seals Nitrile With Fabric Reinforcing
Gear End Spheroidal Cast Iron

Click the image to enlarge


HORSEPOWER SPECIFICATIONS

RPM GPM 1000 PSI 1500 PSI 2000 PSI 2175 PSI
500 13 9.0 13.5 18.1 19.6
640 16.6 11.5 17.3 23.1 25.1
750 19.5 13.5 20.3 27.1 29.5
805 20.9 14.5 21.8 29.0 31.6
865 22.5 15.6 23.4 31.3 34.0
920 23.9 16.6 24.9 33.2 36.1
1000 26 18.1 27.1 36.1 39.3

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 #09535
35A 07740 O-Ring 3
35B 13141 O-Ring 3
36 13025 V-Sleeve weep 3
40 13027 V-Sleeve 6
Valve Assembly Kit – Part #09136
46A 07751 Valve Assembly Complete 3
48A 12055 O-Ring 3
Oil Seal Kit – Part #09577
31 07133 Radial Shaft 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.