rubber seal butterfly valve 1.Mechanic Sealing low friction moment 2.No scratching scars 3.Fast Delivery 4. ... -1, BS5155 , ISO 5752Top flangeISO 5211 BodyDuctile iron,Stainless steel,WCBDiscDuctile iron,CF8,CF8M,C95400,C95500StemSS416,SS420,SS431,SS316SeatNBR,EPDMSuitale ... and so on with the materials of ductile iron, carbon steel, stainless steel to order. Our products are designed and manufactured in ...