Butterfly valve features:1)Material: 321 , 304, 316L 2)Standard: 3A, DIN, ISO,SMS,IDF,RJT Features:1)Material: 1Cr18Ni9Ti ( 321 )2)Standard: 3A, DIN, ISO3)Application: beer, food, dairy, beverage, cosmetics, pharmacy and chemical etc industriesmain outer size DNLA BDFE50108260801601251006511227090180145120801142759719516013 )