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A German-made reciprocating triplex plunger pump for high temperature 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; high temperature nitrile seals (with fabric reinforcing); stainless steel valves and cast bronze manifold with coolant tube connections.

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
Flow17.7 GPM66.6 L/min
Maximum Discharge Pressure1160 PSI80 bar
Crankshaft Speed570 RPM
Power14.6 HP10.9 KW
Max Temperature220 °F105 °C
Inlet Port Size1-1/4" BSP
Discharge Port Size1" BSP
Plunger Diameter1.42 in.36 mm
Stroke1.57 in.40 mm
Maximum Inlet Pressure145 PSI10 bar
Crankshaft Diameter1.26 in.35 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US101 fl. oz. 3.0 L
Weight110 lbs.50 kg
Manifold Material 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 #09310
36 13291 Leakage Seal 3
38 07140 O-Ring 6
40 13199 V-Sleeve 6
Valve Assembly Kit – Part #09196A
44A 07150 O-Ring 9
44B 06266 Support Ring 3
46A 07064 Valve Seat 6
46B 07063 Valve Plate 6
46C 07062 Valve Spring 6
Oil Seal Kit – Part #09571
31A 06118 Oil Seal 3
32A 05596 O-Ring 3
33 06117 Compact Ring 3

Horsepower Specifications

RPM GPM 300 PSI 600 PSI 900 PSI 1160 PSI
200 6.2 1.3 2.6 3.8 5.0
300 9.3 1.9 3.8 5.8 7.4
400 12.4 2.6 5.1 7.7 9.9
500 15.5 3.2 6.4 9.6 12.4
600 17.6 3.7 7.3 11.0 14.6

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • LP121HT Exploded View
  • LP121HT Parts List
  • LP121HT Torque Specifications


Documents open in new window/tab.

  • Pump Assembly Instructions
  • Giant Industries Limited Warranty
  • LP121HT Installation Instructions
  • LP121HT 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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