A heatless air dryer is a type of compressed air dryer that uses adsorption to remove moisture from the compressed air. Unlike other types of compressed air dryers, a heatless air dryer does not use heat or refrigeration to cool or dry the compressed air.
Instead, a heatless air dryer uses a desiccant material, such as activated alumina or silica gel, to adsorb the moisture from the compressed air. The dryer has two towers filled with desiccant material. While one tower is drying the compressed air, the other tower is being regenerated by purging it with a small amount of dry compressed air.
The dry compressed air is then passed through a filter to remove any remaining particles before it is sent out to the system. Heatless air dryers are commonly used in applications that require very low dew points, such as in pharmaceuticals, electronics, and food processing industries.
The dew point of our desiccant air dryer can be -20℃, -40℃ and -70℃.