Champion's Evolution combines the advantages of a reciprocating compressor with less noise and vibration. This compressor consists of an acoustic enclosure, which covers an electric motor. A two-stage, splash-lubricated compressor pump offers features such as slow speed operation for long life, rugged cast iron crankcase construction for maximum reliability, unique gasketless head design, stainless steel valve disks and tapered roller main bearings. Two separate cooling circuits allow the electric motor to operate in its own isolated area, ensuring heat from the compressor operation does not increase motor temperature.