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A German-made triplex plunger positive displacement pump with reciprocating plungers for belt drive applications.

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 nickel-aluminum-bronze manifold.

WARNING: This product might contain a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to

Specification US Metric
Flow35.6 GPM134.7 L/min
Maximum Discharge Pressure1300 PSI90 bar
Crankshaft Speed800 RPM
Power32.1 HP23.9 KW
Max Temperature160 °F71 °C
Inlet Port Size(2) 1-1/2" BSP
Discharge Port Size(2) 1" BSP
Plunger Diameter1.65 in.42 mm
Stroke1.65 in.42 mm
Maximum Inlet Pressure90 PSI6.2 bar
Crankshaft Diameter1.38 in.35 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US116 fl. oz. 3.43 L
Weight116 lbs.52.6 kg
Manifold Material Aluminum Bronze
Crankcase Material Spheroidal Cast Iron
Plunger Material Solid Ceramic Oxide
Valve Material High Grade Stainless Steel
Seal Material Nitrile with Fabric Reinforcing
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.
Plunger Packing Kit – Part #09575
35A 06619 O-Ring 3
36 13415 Grooved Ring 3
36B 06174 Drip Shield 3
39 07744-0100 Pressure Ring 3
40 07745 Sleeve 6
Valve Assembly Kit – Part #09136-0100
46A 07751-0100 Valve Assembly 6
48A 06577 O-Ring 6
Oil Seal Kit – Part #09577
31 07133 Radial Shaft Seal 3

Horsepower Specifications

RPM GPM 600 PSI 800 PSI 1000 PSI 1300 PSI
500 22.3 9.3 12.4 15.5 20.1
555 24.7 10.3 13.7 17.2 22.3
640 28.5 11.9 15.8 19.8 25.7
695 30.9 12.9 17.2 21.5 27.9
750 33.4 13.9 18.6 23.2 30.2
800 35.6 14.8 19.8 24.7 32.1

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • LP122A-3100 Exploded View
  • LP122A-3100 Parts List


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • LP122A-3100 Installation Instructions
  • LP122A-3100 Repair Instructions
  • Troubleshooting Guide

Sample Pump

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For 50 years, Giant Pumps has offered the most dependable positive displacement high-pressure triplex pumps available. Designed and built to the highest quality standards, customers count on Giant Pumps products to keep their equipment running. Every design detail of Giant Pumps products is optimized for long-life and reliable performance, making Giant Pumps the most trusted name in high-pressure pumps and systems.

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