PICO-DRY adsorption dryers are designed to separate water vapour from compressed air, thereby reducing the dew point. These dryers have been specially designed for piston compressors with a relatively low load (frequent starts and stops). Adsorption takes place under pressure in the lower part of the column. When the compressor stops, the adsorption stops automatically and the column is depressurised. At the same time, dry air from the buffer tank is slowly expanded and used for regeneration. The dryer is equipped with a final cooler and filter to ensure that liquid water, oil and other important contaminants do not enter. Springs in the columns ensure that the desiccant balls do not move during operation. A robust, proven design ensures efficient, reliable operation, rapid installation and simple maintenance.