The CDHM Series desiccant air dryers use the proven “Pressure Swing Adsorption” (PSA) method for drying wet compressed air. This requires having two identical towers containing hygroscopic desiccant. The unique design of the CDHM Series allows for the dryer to start and stop with a compressor or point-of-use equipment to eliminate purge loss when off. The solid state memory feature allows the dryer to start where it left off in the drying cycle to prevent wet air downstream. 3 - 50 SCFM Maximum Working Pressure: 150 PSIG Maximum Inlet Temperature: 120°F Pressure Dewpoints to -100°F Unique Energy Saving Design Eliminate purge loss with remote stop/start control