Our new OABC-D Series Compressed Air & Nitrogen Booster Is a Rotary Screw, Variable Speed Drive Booster that deliver 71-268 CFM at 580 PSI. This product has a long service life and low maintenance cost. Unlike traditional Reciprocating boosters that need to be overhauled every 4,000 hours, the Rotary Screw design only needs to be overhauled every 40,000 hours. It is also serviced just like a regular Rotary Screw Compressor. Oil Filter change every 2,000 hours and Oil & Separator changes every 8,000 hours.