Screw Compressor for Compressing Air Screw Compressor for Compressing AirBrief Introduction for Screw CompressorBLT - 7 a ~ 120 a/W ... protection, nitrogenizing, furnace washing and blowing, etc. Used in fields such as metal heating treatment, powder metallurgy, magnetic ... , gas replacement, gas protection, product transport, etc. Used in fields such as chemical, urethane elastic fiber, rubber, plastic ...