Sanitary quick-install check valve(non return) 1)Material:SUS304,304L,316.316L 2)Standard: ... ,3A,IDF 3)Size:DN25-150&1 Sanitary quick-install check valve(non return) SHSD0151)Material:SUS304,304L,316.316L2)Standard:DIN ... device:Normally closed,normally opened,opened and closed by two air flues separately 8)Application:beer,food,brewery,berverage,pharmacy,chemical ...