... Valve manufacture directly suppling:dn150 hand lever operated cast iron wafer butterfly valve for cement Flange Drilling:Universal flange ... JIS 10K,BS10 TABLE "E"Optional Materials:Body: Cast Iron GG25, Ductile Iron GGG40, GGG50Disc: DI+Nickel painted,SS304/316,AL- ... flow resistance.6. Suitable medium: water, sewage, sea water, air, steam, food, medicament, oils, acids, alkalis, salts etc. No leakage ...