Flange centerline butterfly valve 1.DN50-1200 or 2-48" 2. ... DIN, BS,ISO etc 4.With CE & ISO certificate Flange centerline butterfly valve is designed by DIN(BS) standard from DN50 ... valves for your choose including Wafer, Lug, U type, D341(centerline double flanged butterfly valve), D343(double eccentric flanged butterfly valve ... pls don’t hesitate to let me know. Double Flange centerline butterfly valve