The modular adsorption dryers in the X-DRY 300-1050 range are designed for continuous separation of water vapour from compressed air, thereby reducing the dew point. The dryer requires two columns operating alternately. Adsorption takes place under pressure in the first column, while the second is regenerated using some of the air already dried at ambient temperature. A dryer consists of two columns filled with adsorbent, a sulphur plant, a heating device, a controller with LCD screen, valves, pressure gauges and a support structure. The proven robustness of the unit ensures efficient and reliable operation, as well as simple installation and maintenance.