... 1, BS5155 , ISO 5752Top flangeISO 5211BodyDuctile iron,Stainless steel,WCBDiscDuctile iron,CF8,CF8M,C95400,C95500StemSS416,SS420,SS431,SS316SeatNBR ... on with the 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 Casting ...