Hitachi dry oil-free air compressor adopts laminated structure air filter,Non-woven fabric with two kinds of 3-dimensional structural chemical fibers,Through lamination,Three-dimensional dust capture;The newly designed exhaust silencer effectively suppresses pressure pulsations,Significantly reduce high-frequency noise;Lift check valve design extends service life;Excellent suction and ventilation acoustic enclosure,Design of oil mist recovery system,Create modern environmental protection industrial equipment。