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35. In a twin-tower desiccant type air dryer using silica gel as an adsorbing agent, what is the procedure for rejuvenating the tower presently on service when the desiccant becomes saturated with moisture?
In a twin-tower desiccant dryer, the saturated tower must be removed from service and heated to restore its drying capacity; therefore, towers are shifted, and heat is applied to the off-going tower.
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