... 3.Disc: CI DI WCB SS Aluminum bronze U type Butterfly Valve1.Size: DN700 to DN12002.Body: CI DI3.Disc: CI ... .5 JIS 5K 10K 20K DIN2501 AS2129 TABEL C/D/E ETC... Butterfly valves can operate for more than 10,000 cycles ... , vapor, food, medicine, acids, alkalis, salts, paper making etc. Flanged Butterfly Valve-U type