Mikropor MDA Heatless Desiccant Air Dryers provide constant -40⁰C (-70⁰C Optional) pressure dew point.
These dryers are designed to supply clean and very dry compressed air for critical applications. Pre-filters and
after-filters are standard on all Mikropor Heatless Air Dryers to keep the air stream clean and maintain the integrity
of the desiccant medium. A very reliable electronic controller is utilised so the dryer operates perfectly through
its service life. MDA Heatless Desiccant Dryers are equipped with special valves and high quality desiccants
in order to assure performance and provide the lowest pressure drops available in the market.
Principle of Operation
The twin tower design allows for continuous adsorption
of water vapor from compressed air by using the hygroscopic
desiccant with high crush strength and a high surface/volume
ratio. Drying is accomplished by passing compressed air through
one desiccant bed adsorbing moisture while the other is being
simultaneously regenerated with the expanded purge air.
Regeneration of desiccant is accomplished without the use
of heat. The wet bed is dried by diverting a small portion
of the super-dry air from the outlet at near atmospheric
pressure. The purge flow rate is adjustable to suit the specific
outlet conditions (desired dew point). The super dry air flows
in a counter direction through the wet bed, sweeping all
the water vapor previously absorbed by the desiccant.
MDA ensures pressure equalization in the twin towers prior