flange connection butterfly valve 1)Size:DN50-1200 2)PN:1.0/1 ... Butt Weld OfferedProducts: We can produce gate, globe, check, ball and butterfly valves with the materials of ductile iron, carbon ... 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