... ,ISO,BS,DS 1000pcs a week,sanitary 3 pc butterfly valve Sanitary 3 pc butterfly valve1)Material:SS304,304L,316,316L2 ... -6" applied to the stainless steel pipeline system3)ISO9001:20004)Standard:SMS,DIN,3A,IDF,ISO,RJT,BS,DS,BPE...5 ... type is pneumatic or manual type Sanitary 3 pc butterfly valve