Double Flanged Rubber Lined Butterfly Valve Good quality with favarouble price. SpecificationsDouble Flanged Butterfly Valve 1)Size: DN40-DN1400 2) ... , check valves, gate valves and so on with the materials of ductile iron, carbon steel, stainless steel to order ... and manufactured in accordance with the standards of GB, ASME, ANSI, API, BS, DIN, JIS etc. Double Flanged Rubber Lined Butterfly Valve ...