... gas/liquid technology Energy Conservation ISO9001:2008 & CE HRD Series Air Dryer Work Condition and Technical Data:Inlet temperature : ... III.Energy conservationNew design of the heat exchanger, adverse current structure,perfect returning temperature and it won’t freeze. ... practical conditions,we designed & manufactured HOLYSUN brand HSD series Refrigerated Air Dryer,Absorbing Air Dryer,After Cooler,Air ...