... " 2)Standard: DIN,SMS,ISO,3A 3)Material: stai Stainless Steel Pneumatic Butterfly Valve 1)Specification: DN15-200,1",1.5", 2", 2 ... ", 4", 6" .2)Standard: DIN,SMS,ISO,3A.3)Material: stainless steel 304,314L,316,316L.4)Applications: pharmacy,beer,food,petroleum ...