Description
Finned cooling flywheel blades drive the Rolair K30 2-Stage Compressor Pump to deliver dependable replacement air volume on commercial stationary and heavy contractor wheelbarrow air compressors. The cast-iron 2-stage pump delivers 15 to 25 CFM displacement at operating pressures up to 175 PSI when coupled to 5 HP to 7.5 HP electric motors or 9 HP to 13 HP gas engines. Equipment mechanics rebuild damaged jobsite compressors without replacing entire machines. Operating this pump requires filling the crankcase with synthetic compressor oil before motor startup.
Two-Stage Displacement Dynamic Bench Limits
Flowmeter dynamometer testing confirms the pump produces 15.3 CFM at 175 PSI when driven at 750 RPM by a 5 HP electric motor, and up to 23.8 CFM at 175 PSI when driven at 950 RPM by a 7.5 HP motor. The multi-blade cast-iron flywheel directs a continuous seventy-mile-per-hour cooling air blast across cylinder cooling fins, holding crankcase oil temperatures below 165 degrees Fahrenheit during four-hour load trials. Concentric disc valves withstand ten million continuous pressure flex cycles without reed fracture.
Solid ASTM Class 30 cast iron forms the 2-stage pump block, crankcase, and deep-finned cylinder heads, delivering superior thermal conductivity and long cylinder bore life. An automotive-style cast iron flywheel features integrated fan blades to cool cylinder barrels during operation. Sized as a universal replacement pump, the unit weighs 96 lbs, measuring 15 inches long, 13 inches wide, and 18 inches high, featuring a standard four-bolt slotted base pattern.
Key Features of Rolair K30
Equipment repair shops and contractors buy Rolair K30 2-Stage Compressor Pumps to rebuild worn commercial compressors and custom pneumatic power units. Compare commercial replacement air compressor pump pricing to restore high-pressure air output on jobsite equipment.
- Solid 100-percent cast-iron 2-stage pump delivers up to 25 CFM displacement, running cool at low RPM for long service life cleanly.
- Heavy cast-iron flywheel with deep fan blades drives cooling air across cylinder fins to lower operating heat cleanly.
- Swedish stainless steel disc valves resist heat deformation and carbonization, ensuring long maintenance intervals cleanly.
- Finned copper intercooler drops air temperatures between compression stages, reducing moisture condensation in shop air lines cleanly.
- Universal four-bolt slotted base pattern allows fast direct mounting onto standard compressor tank saddle plates cleanly.
Compressor Rebuild Negative Selection Filter
The clear glass oil sight gauge provides immediate visual verification of proper crankcase lubricant level before motor startup. Do not purchase this 2-stage pump for direct-drive 3450 RPM motor couplings without belt pulleys, fractional horsepower motors under 5 HP, or oil-free medical air systems. Routine maintenance requires verifying crankcase oil level before daily operation, changing synthetic pump lubricant after the initial fifty-hour break-in period, and cleaning foam air intake filter elements every forty operating hours.
Factory Warranty Hardware Manifest
Rolair backs this replacement compressor pump with a 1-Year limited manufacturer warranty covering casting flaws, valve breakage, and bearing failures. The factory shipment box includes one complete K30 cast-iron 2-stage compressor pump with flywheel, air intake filter assembly, and an illustrated technical parts breakdown guide.
