OEM 2 CFM single stage pumps are built specifically for air conditioning and refrigeration service, and provide fast, thorough evacuation. Its single stage Rotary vane design provides powerful, Quiet, high vacuum capability and ensures moisture removal, while the high pumping capacity reduces evacuation time. The intake screen prevents foreign matter from entering the pumping chamber, and an internal exhaust filter separates oil vapor from the exhaust flow. The aluminum housing keeps the pump weight low and provides for efficient cooling. Rubber feet reduce vibration.