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A German-made reciprocating triplex plunger pump.

Aluminum 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.

Gearbox and bell housings (to connect to gasoline, diesel, electric or hydraulic drive) and pulsator valve.

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
Flow7.5 GPM28.3 L/min
Maximum Discharge Pressure1900 PSI130 bar
Crankshaft Speed1450 RPM
Power9.8 HP7.3 KW
Intermittent Flow9 GPM32.8 L/min
Intermittent Discharge Pressure1510 PSI104 bar
Intermittent Crankshaft Speed1750 RPM
Intermittent Power Consumption9.4 HP7.0 kW
Max Temperature140 °F60 °C
Inlet Port Size(2) 1/2" BSP, (1) 3/4" BSP
Discharge Port Size(2) 1/2" BSP
Plunger Diameter0.87 in.22 mm
Stroke0.71 in.18 mm
Maximum Inlet Pressure145 PSI10 bar
Crankshaft Diameter0.94 in.24 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US12.5 fl. oz. 0.37 L
Weight19.4 lbs.8.8 kg
Volumetric Efficiency0.95
Mechanical Efficiency0.80
NPSHR21.3 Ft.-head6.5 mWs
Manifold Material Forged Brass
Crankcase Material Aluminum
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 #09317
31 06250 Automatic Seal Ring 3
32 06253 Support Ring 3
40 07234 O-Ring 6
49 01009 O-Ring 1
50 13390 Grooved Seal 3
Valve Assembly Kit – Part #09318
34 07326-0100 Tension Cap 6
35 07312-0100 Valve Spring 6
36 07327 Valve Plate 6
37 06014 Valve Seat 6
38 06015 O-Ring 6
Oil Seal Kit – Part #09202
26 07206 Radial Shaft Seal 3

Horsepower Specifications

RPM GPM 500 PSI 1000 PSI 1510 PSI 1900 PSI
910 4.7 1.6 3.2 4.9 6.1
1025 5.3 1.8 3.6 5.5 6.9
1190 6.1 2.1 4.2 6.3 7.9
1305 7.0 2.4 4.8 7.2 9.1
1450 7.5 2.6 5.1 7.8 9.8
1750 9.0 3.1 6.2 9.4


Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • P59 Exploded View
  • P59 Parts List
  • P59 Torque Specifications


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • P59 Installation Instructions
  • P59 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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