ABSTRACT
Compressors and vacuum pumps are vitally important industrial equipment. Gas compressors are mechanical devices that are used to pressurize and circulate gas through a process, facilitate chemical reactions, provide inert gas for safety or control systems, recover and recompress process gas, and maintain correct pressure levels by adding and removing either gas or vapors from a process system. Compressor and hydraulic pumps are similar devices with the main difference being that the fluid delivered by compressors is usually a gas which is compressed and under pressure at the time it is delivered, even if there is no load on the system.
