Refrigeration is one method of removing moisture from compressed air.
This unit removes water vapor entrained in the stream of compressed air by causing the water to condense into a liquid that is heavier than air. The air then moves through the evaporator section of the dehydrator, where the air is chilled by circulating refrigerant. In this unit, the airstream is cooled to a temperature that is below the dew point. This will cause the water vapor in the air to condense so it can be removed by the condensate drain system. The heating of the air serves to reduce thermal shock as the air enters the system.