... initial cost. Heat-less,twin-tower,regenerative,desiccant air dryers,refrigerated air dryer,air cooled chillers KC DRYERS DELIVER-PERFORMANCE,RELIABILITY,EFFICIENCY ο 3 ... . ο 2-Way, diaphragm operated, poppet-style purge exhaust valves,designed to handle purge air containing abrasive desiccant dust. ο Epoxy encapsulated, tamper-proof ...