Refrigerated Air Dryer work by using two separate heat exchangers, where one is employed for air to air and another for air to refrigeration. It uses hermetic type compressor and R-22 & R-404a refrigerants. This dryer works on the principle of cooling of hot incoming air with the help of cold outgoing air. It generally operates at low dew point ranging from 35 to 40 degree Fahrenheit.
Heatless Air Dryer uses activated alumina, silica gel, or molecular sieve as a medium in the pressure vessel through which compressed air is passed. Also known as regenerative dryer, it is based on the principle of pressure swinging drying and works at low pressure having purge rate of 17-20%. This dryer generally comes in ready to install configuration and requires less floor space. It is highly appreciated for its less moving parts, low maintenance, and completely reliable nature.
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