Air Compressors are machines that get fueled by electric motors, diesel engine etc to convert power into potential energy which gets stored in compressed air.
These machines are used to refrigerate warm wet air down to 3 degrees and make it cooler which will condense all the water vapors in the air to water. Then it is removed from the air by a water trap.
These are used to drain the condensed water form the air system without loss of compressed air and power of the system.
These machines are used to transfer heat form the water to a refrigerant in a loop and then pumped out the heat to the atmosphere.
These filters are installed in air filters for removing dust, moisture, rust scales & oil particles from compressed air.