... DN3500Class Range: 150LB-900LB/PN1.0~PN6.4Construction: Body And Bonnet Available In Carbon Steel, In Alloy ... produce gate, globe, check, ball and butterfly valves with the materials of ductile iron, carbon steel, alloy steel ... order. Our products are designed and manufactured in accordance with the standards of GB, ASME, ANSI, API, BS ... to maintain. flange connection butterfly valve with split body