... Face: ISO series 13 Flange drilling ANSI 125/150, BS4504 and DIN PN10 / PN16 flanges2) Body: cast iron, ductile iron, carbon ... , ductile iron with nylon coated4) Seat: EPDM, NB, BUNA-N, PTFE, VITON 5) Stem: SS410, SS416, SS304, SS316, carbon steel (WCB ... steel (WCB)8) O ring: EPDM, NBR, BUNA-N 9) Bushing: PTFEFor catalog, pls visit www.metalvalves.com Butterfly Valves Double ...