HP-DRY high pressure adsorption dryers have been designed for continuous separation of water vapour from compressed air thus reducing dew point. Operation of the dryer requires two columns operated alternately. Adsorption takes place under pressure in the first column while the second column regenerates with a portion of already dried compressed air at ambient pressure. High pressure adsorption compressed air dryer consists from control valves, controller with LED display and two columns filled with desiccant. Springs in the columns make surethat the desiccant beads will not move during operation. Proven robust design enables efficient and reliable operation, fast installation and simple maintenance.