Product Description

Heatless Desiccant Air Dryers

Mikropor MHL Series Heatless Desiccant Air Dryers provide constant -40°F (standard) or -94°F (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 MHL Series Heatless Air Dryers to keep the air stream clean and maintain the integrity of the desiccant medium. A very reliable electronic controller is incorporated so the dryer operates perfectly through the service life of the dryer.

MHL Heatless Desiccant Dryers are equipped with robust 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 dewpoint) The super dry air flows in a counter direction through the wet bed, sweeping all the water vapor previously absorbed by the desiccant.  MHL Series electronic controls ensure 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 take place. Purge flow and de-pressurization are in downward direction, counter flow to the drying air flow.

PLC is standard

MHL Series 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 which operate on in real time graphically in addition to showing dewpoint.  The user friendly multi-lingual PLC.  PLC helps end users understand the operation system and issues easily.

Activated Alumina

In order to achieve consistent dewpoint, Mikropor uses a mixture of adsorption media in its heatless range of desiccant dryers. Activated Alumina, Molecular Sieve and Silica Gel are used in varying ratios depending on the application.