A German-made reciprocating triplex plunger pump for bentonite 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; rope packing; stainless steel valves and spheroidal 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 www.P65Warnings.ca.gov

  • BP8085 Exploded View
  • BP8085 Parts List
  • BP8085 Torque Specifications

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  • Giant Industries Limited Warranty
  • BP8085 Installation Instructions
  • BP8085 Repair Instructions
  • Troubleshooting Guide


U.S. Metric
Flow 171.7 GPM 650 L/min
Maximum Pressure 1160 PSI 80 bar
Crankshaft Speed 530 RPM
Power Consumption 134 HP 100 kW
Maximum Inlet Pressure 145 PSI 10 bar
Maximum Temperature 104 ºF 40 ºC
Plunger Diameter 3.30″ 85 mm
Stroke 2.83″ 72 mm
Crankshaft Diameter 70 mm
Crankshaft Rotation Top of Pulley Towards Manifold
Key Width B20 x 12 x 110 mm
Crankshaft Mounting Either Side
Inlet Ports (2) 3″ BSP
Discharge Ports (2) 1-1/2″ BSP
Crankcase Oil Capacity 4.6 gal. 17.5 L
Weight 785 lbs. 356 kg
Key Component Material
Manifold Cast Iron
Plungers Solid Ceramic Oxide
Valves Stainless Steel
Seals Rope Packing
Gear End Spheroidal Cast Iron

Click the image to enlarge


RPM GPM 500 PSI 700 PSI 900 PSI 1160 PSI
300 97.2 33.5 46.9 60.3 77.8
400 129.6 44.7 62.6 80.4 103.7
500 162.0 55.9 78.2 100.6 129.6
530 171.7 59.2 82.9 106.6 137.4

Horsepower Requirements

The ratings shown are the power requirements for the pump. Gas engine power outputs must be approximately twice the pump power requirements shown above.

We recommend a 1.15 service factor be specified when selecting an electric motor as the power source. To compute specific pump horsepower requirements use the following formulas:
Electric HP = (GPM X PSI)/1450
Gas HP = (GPM X PSI)/1100

*Engine power varies based on horizontal or vertical orientation, as well as by makes and models from each manufacturer.


Plunger Packing Kit – Part #09822
38A 05056 O-Ring 6
40 04939 Support Ring 3
41 04940 Guide Ring 6
42 04941 Spiral Ring 6
Valve Assembly Kit – Part #09823
51 04949 Valve Assembly 6
56A 04955 O-Ring 3
56B 04966 O-Ring 3
Oil Seal Kit – Part #09584
32 05058 Radial Shaft Seal 3
33A 05056 O-Ring 3

Repair Kits Available

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.

Service & Repair

Giant provides service on each pump and accessory that we sell. Many basic repair procedures are covered in the Giant repair manual. For all other questions on service or repair needs please contact your local Giant distributor.