Heat Reactivated Type Air Dryer

External Heat Re-activated type Air Dryer. External heat reactivated air dryers are bulky in size and power consumption is all most is double as compare to internal heat re-activated type air dryer in capacity Less than 500 Nm3/hr these are un- commercial  and not recommended   also since regeneration of desiccant is by atmospheric air. These dryers give the dew point only up to (-) 40CCapacity:          Air Capacity: 500 to 5000 Nm3/Hr.         Dew Point   :   Up to (-) 40C          Operating Pressure:  5 to 35 Kg/cm2gOperating Principle: In this design there is no loss  of compressed air time cycle is 6+6 Hrs with (-)  drying towers filled with silica gel desiccant for regeneration , a centrifugal air blower and an electrical heater is provided desiccant is heated up to 200C by hot air of completely    re generationCompression with internal heat re-activated type air dryer:          Investment cost of these Air dryer is all most double as compared to internal heat re-activated air dryers.          It is recommended to go for this type of dryer only when loss compressed air during regeneration is not acceptable and dew point required is not critical also these are recommended for capacities above 500Nm3/hr only. Operating pressure can be from 1 to 50 kg/cm2g.