flange connection butterfly valve 1)Size:DN50-1200 2)PN:1.0/1 ... can produce gate, globe, check, ball and butterfly valves with the materials of ductile iron, carbon steel, alloy steel, stainless ... to order. Our products are designed and manufactured in accordance with the standards of GB, ASME, ANSI, API, BS, DIN ... as the minimum standard to maintain. flange connection butterfly valve with split body