An air compressor is a pneumatic device that converts power (by an electric motor, diesel or gasoline engine, etc.) into potential energy stored in compressed air (i.e., compressed air). Using one of several methods, an air compressor blows more and more air into the storage tank, increasing the pressure. When the cylinder pressure reaches the set upper limit, the air compressor is shut off. Thus, the compressed air remains in the tank until it is used. The energy contained in compressed air can be used for a variety of applications, utilizing the kinetic energy of the air as it is released and depressurized in a tank. When the pressure in the tank reaches its lower limit, the air compressor turns on again and re-pressurizes the tank. An air compressor should be distinguished from a pump because it works with any gas / air, and the pumps work with liquid.