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 to switching.

This prevents line surge and minimizes desiccant attrition.

The tower being reactivated will be gradually re-pressurized at the end of its reactivation cycle before switch over takes place.

Purge flow and de-pressurization are in downward direction,counter to the drying air flow.

PLC is Standard

MDA Desiccant Dryers have an extremely reliable electronic controller for optimal

performance over the lifetime of the dryers.

The touch screen PLC is capable of showing the cycles as well as the valves as they operate

in real time. This is also capable of showing dew points. User friendly multi-lingual PLC helps

the end users understand the operation of the system and identify any issues easily.

Mikropor MDA Heatless Desiccant Air Dryers provide constant -40°C (-70°C is optional) pressure dew point. These

dryers are designed to supply clean and dry compressed air for critical applications. Pre and after-filters are supplied

along with Mikropor Heatless Air Dryers to keep the air stream clean and maintain the integrity of the desiccant medium.

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.