... : SUS304, SUS316L Standard: ISO, DIN, 3A, SMS, IDF Sanitary Butterfly Valve Connection mode: Clamped Specification: 1"-4", DN25-DN100 Material quality ... forms: Normally closed, normally opened and opened and closed by two air flues separately. Application: Pharmacy, beer, food, dairy, beverage, cosmetic ... and can manufacture them according to the drawing Sanitary three-piece Butterfly Valve