... to overseas 3) More than 20 years manufacture experience... Structure: Gate Production enforce standard Design and manufacture --- Api600,API6DFace to Face ... --- 2.2Mpa-47MpaAir Seal Test --- 0.4-0.7MPaMaterial For Main Parts Body Conver Disc --- Wcb,WC1,WC6,WC9,C5,C12 ... --- Water,Steam,Peroleum Propoducts,Nitric acid,Acetic acid,Urea ANSI gate valve