Heated Regenerative Desiccant Dryer
The Donaldson AEHD Series Externally Heated Desiccant Compresssed Air Dryer is a fully automatic, PLC controlled, selfcontained unit offering a fail-safe design ?? in the event of power interruption and/or air loss, the purge exhaust valves close preventing damage to the dryer and the process.
Heatless dryers do not use any source of heat for regeneration other than heat given off during the drying, or adsorption, cycle. This is referred to as ??the heat of adsorption.? However, heatless dryers will consume up to 15% of the process air they are drying during the regeneration cycle. Heated dryers, on the other hand, utilize an external heat source for regeneration and require little or no process air. Donaldson??s three heated desiccant dryer types use different methods for heating, and subsequent cooling and repressurizing, the air used for regeneration.
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