The entire valve body and bonnet,inside and outside are fully coated with a fusion bonded epoxy that offers protection a阀门内外表面采用无毒环氧树脂粉末涂敷，闸板全包耐蚀橡胶，其他与介质接触的零件，均采用不锈钢和铜合金制造，具有良好的抗蚀性能，不污染介质。