Refrigerant dryers are the most appropriate dryer for most applications. Based on a simple refrigeration pump, they are cheap to operate and maintain. Inside the dryer the compressed air is cooled to about 3’C. The water condenses out and is removed. The, now dry air, is re-heated back to room temperature before leaving the dryer. This re-heating process prevents condensation forming on pipework. outside the dryer
Refrigerant dryers create dry air with a dew point of around 3°C which is perfectly acceptable for most industrial applications. Only if pipework is routed outside (in winter) or through chilled of frozen areas should water re-appear in the compressed air.