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A German-made reciprocating triplex plunger pump for liquid CO2 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; Teflon seals with EPDM O-rings; stainless steel valves and nickel-plated cast iron 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
Flow51.5 GPM195 L/min
Maximum Discharge Pressure1500 PSI100 bar
Crankshaft Speed550 RPM
Power55.2 HP41.2 KW
Max Temperature140 °F60 °C
Inlet Port Size(2) 2-1/2" BSP
Discharge Port Size(2) 1-1/4" BSP
Plunger Diameter2.17 in.55 mm
Stroke2.05 in.52 mm
Maximum Inlet Pressure870 PSI60 bar
Crankshaft Diameter48 mm
Crankshaft RotationTop of Pulley Towards Manifold
Crankshaft MountingEither Side
Crankcase Oil Capacity US1.6 gal 6.0 L
Weight374 lbs.170 kg
Manifold Material Nickel-Plated Cast Iron
Crankcase Material Cast Iron
Plunger Material Solid Ceramic Oxide
Valve Material Stainless Steel
Seal Material Teflon with EPDM O-Rings
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 #CP09593
38A CP13156-0003 O-Ring, EPDM 3
38B CP07721-0003 O-Ring, EPDM 3
39A CP07723 Compact Ring 3
42 CP07711-0020 V-Sleeve, Teflon 6
Valve Assembly Kit – Part #CP09594
51A CP13163 Valve Seat 2
51B CP07653-0003 O-Ring, EPDM 2
51C CP13164 Valve Plate 2
51D CP07732-0100 Valve Spring, 316 S.S 2
51F CP13166 Support Ring 2
51G CP07266-0003 O-Ring, EPDM 2
56A CP07658-0003 O-ring, EPDM 2
56B CP07635 Support Ring 2
56C CP13168 Support Ring 1
56D CP07653-0003 O-Ring, EPDM 2
Oil Seal Kit – Part #CP09221
32 CP07624 Radial Shaft Seal 3
32A CP07625 Shaft Seal 3
33A CP07627 O-Ring, Oil Seal Housing 3

Horsepower Specifications

RPM GPM 800 PSI 1000 PSI 1300 PSI 1500 PSI
250 23.4 13.4 16.7 21.7 25.1
350 32.8 18.7 23.4 30.4 35.1
450 42.1 24.1 30.1 39.1 45.1
550 51.5 29.4 36.8 47.8 55.2

Images Open in new Window/Tab

  • Dimensional Drawing (Side) Open
  • Dimensional Drawing (Front) Open
  • CGP7255A Exploded View
  • CGP7255A Parts List
  • CGP7255A Torque Specifications


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • CGP7255A Installation Instructions
  • CGP7255A 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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