Champion's R70A Pump is used on many of their top selling compressors, including the R-series and the popular Advantage Series of packaged air compressors. The R70A is rated for operation with 20, 25, and 30 HP motors.

   The R70A is currently the standard factory-installed pump on the following models: HRA20-12, HRA20-25, HRA25-12, HRA25-25, HRA30-12, HRA30-25, BRA20, BRA25, BRA30, HRA20D-25, HRA25D-25, HRA30D-25

Features:

1. Multi-finned Cylinders
   •  Provide cooler operating temperatures that result in longer life and consistent performance over time.
2. Integral Cylinder/Head
   • Gasketless design of the compressor head eliminates the possibility of blown head gaskets for leak-free operation.
3. Balanced Pistons
   • Aluminum alloy first-stage piston is weight matched to the cast iron second-stage piston, ensuring proper balance.
4. Piston Rings
   • Featuring three compression rings and one oil control ring to provide excellent oil control, minimum blow-by and high efficiency air delivery.
5. Lightweight Connection Rods
   • High-density, die-cast aluminum alloy connecting rods minimize reciprocating weight. An integral, precision-bored crankpin bearing and a needle bearing for the piston pin properly distribute bearing loads for longer bearing life than bushings.
6. Pressure Relief Valves
   • Located in interstage and discharge allow safe and reliable operation.
7. Intercoolers
   • Large-diameter finned tubing is positioned to obtain the greatest cooling effect between stages for maximum compressor efficiency.
8. Optimized Cooling Fan/Flywheel
   • Precision balanced flywheel has fan blades for optimum compressor cooling and life.
9. Reliable, High-Flow Valves
   • Single-unit, disc-type valves provide low lift and long life. Discs are made of corrosion resistant Swedish steel. Valves are easily serviced by removing the manifolds only.
10. Oversized Main Bearings
    • Tapered roller-type main bearings provide full contact and support of the crank plus delivers the longest possible life.
11. Balanced Crankshaft
    • Constructed of rugged ductile iron with large diameter throws for minimum bearing loads and counterweights to minimize vibration.
12. Large Capacity Crankcase
    • Rugged cast iron oil reservoir has convenient sight gauge glass, corner oil fill boss and large oil drain.
13. Loadless Starting
    • Positive acting, governor-type centrifugal unloader assures longer motor life by allowing the compressor to start unloaded every time.