HG/HGE Series Dryers Improve Productivity. Since 1961, Deltech has delivered technologies that effi ciently remove contaminants from compressed air systems. Properly treated compressed air increases productivity and minimizes downtime. Maintenance costs are slashed as improved air quality extends service intervals. Process cleanliness is assured. Facilities with small-to-medium sized air systems simply want dry air, reliability and an affordable price. Deltech responds with the HG and HGE Series non-cycling refrigerated air dryers that keep your air system at a dry, 38°F (+3°C) pressure dew point, from 10 through 500 SCFM.