A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. Compression of a gas naturally increases its temperature. Compressors are similar to pumps in that both increase the pressure on a fluid and both can move the fluid through a pipe. As gases are compressible, the compressor also reduces the volume of a gas, whereas liquids, being relatively incompressible, receive from a pump an energy of motion that propels them through a pipe.
Gas compressors are designed for continuous service within a range of operating conditions up to the maximum prime mover output.