Right up to the end of desorption, moisture is removed from the adsorber, thus making the desorbed unit ready to accomplish adsorption again . However, switching over from desorption to adsorption cannot take place while there is the pressure difference between atmospheric regeneration pressure and the required operating pressure. This would lead to a pressure surge when switching over, leading to high mechanical strain. For this reason, pressure equalisation starts following desorption, as soon as the exhaust valve (item 6) is closed. Switch over from desorption to adsorption takes place while the pressure level in both adsorbers is identical.
