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A heatless desiccant air dryer operates by passing compressed air through desiccant beads. 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). https://www.lingyumachinery.com/item/heatless-desiccant-air-dryer/
