Control air dryer and its operation

• Control air dryer usually take the form of a refrigeration system to drop the temperature of the air below its dew point .
• The water droplets will collect on the surface of the fridge evaporator where they are led to an automatic drain.
• Further removal of water from the chilled air is effected by making the air swirl through a separating chamber where the water droplets collect on the outter surfaces.
• In some cases finallybthe air air can be led through dryers containing silica gel or activated alumina which will remove any remaining moisture from the air .
• This form of dryer must be fitted with means of refrigeration.