Double Flanged Rubber Lined Butterfly Valve ... , ISO 5752Top flangeISO 5211 BodyDuctile iron,Stainless steel,WCBDiscDuctile iron,CF8,CF8M,C95400,C95500StemSS416,SS420,SS431,SS316SeatNBR ... materials of ductile iron, carbon steel, stainless steel to order. Our products are designed and manufactured ... in accordance with the standards of GB, ASME, ANSI, API, BS, DIN, JIS etc. Double ...