A heatless desiccant air dryer operates by passing compressed air through a bed of desiccant material. The desiccant material, usually silica gel or activated alumina, adsorbs moisture from the compressed air, resulting in dry air at the outlet. The process is called pressure swing adsorption (PSA). The air is passed through the desiccant bed at high pressure, and then the pressure is reduced, allowing the desiccant to release the moisture it has adsorbed. The wet desiccant is then purged with dry compressed air, and the cycle starts again.

Heatless air dryers are commonly used in applications where the compressed air needs to be dry, but the dew point requirement is not critical. They are generally less expensive than heated desiccant dryers and consume less energy, as they do not require heating. Heatless air dryers are commonly used in applications such as painting, sandblasting, and instrument air. You can contact Lingyu Machienry ~ heatless desiccant air dryer for more information.