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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
Flow6.6 GPM25.0 L/min
Maximum Discharge Pressure3625 PSI250 bar
Crankshaft Speed1450 RPM
Power16.6 HP12.4 KW
Max Temperature160 °F70 °C
Inlet Port Size(2) 3/4" BSP
Discharge Port Size(2) 1/2" BSP
Plunger Diameter0.71 in.18 mm
Stroke0.94 in.24 mm
Maximum Inlet Pressure90 PSI6.2 bar
Crankshaft Diameter28 mm
Crankshaft RotationTop of Pulley Towards Manifold
Key Width8 mm
Crankshaft MountingEither Side
Crankcase Oil Capacity US30 fl. oz. 0.89 L
Weight36.5 lbs.16.6 kg
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 #09141-0021
21 07266-0001 O-Ring 3
23 08087-0020 V-Sleeve, 18mm 6
24 07929 Pressure Ring 3
Valve Assembly Kit – Part #09646-0001
27A 05578 Valve Assembly, complete 6
33 06015-0001 O-Ring 6
Oil Seal Kit – Part #09641
19 05444 Oil Seal 3

Horsepower Specifications

RPM GPM 2000 PSI 2500 PSI 3000 PSI 3625 PSI
920 4.2 5.8 7.2 8.7 10.5
1050 4.8 6.6 8.3 9.9 12.0
1185 5.4 7.4 9.3 11.2 13.5
1315 6.0 8.3 10.3 12.4 15.0
1450 6.6 9.1 11.4 13.7 16.5

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • P435-5121 Exploded View
  • P435-5121 Parts List


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • P435-5121 Installation Instructions
  • P435-5121 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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