Wet Compressed Air entering the Refrigerated Type Compressed Air Dryer is pre cooled by the cold dry outgoing Air in the Pre-cooler re-heater (Air to Air Heat Exchanger). It then passes to the Evaporator (Air to Refrigerant Heat Exchanger) where it is cooled to final refrigeration systems. The condensed moisture is separated and drained out automatically from the Centrifugal cum Demister pad type Moisture Separator of the Dryer, while the Cold Dry Air undergoes its second path through the Precooler- Reheater (Air to Air Heat Exchanger) to be reheated before leaving the Dryer.

Each of the two towers are filled with a bed of adsorbent desiccant. When one tower is on drying cycle, the desiccant adsorbs moisture from the incoming wet air stream and the other tower is on a regenerating cycle, which, a small portion of the super dried air passing through the desiccant to pick up and remove the adsorbed moisture, which is then vented to atmosphere. The towers are alternated in such a manner so that Dry desiccant is always in contact with wet compressed air, resulting in a continuous supply of Dry Air downstream.

The process is automatically reversed from one tower to another by a microprocessor based sequenced timer. Dryer must be protected against water and oil suspended in the form of drops or finely dispersed mist. If the risk for such condition exists, a high efficiency pre-filter must be installed before the dryer. In regular course a ceramic candle Pre-filter is installed prior to the dryer to take care of incoming dust, dirt and foreign particles. By default a ceramic candle After-filter is installed after the dryer to take care of desiccant dust carry forward in the dry air.