Sanitary Welding Butterfly Valve 1)Material: SS304,SS316L 2)Size:DN25-200or1"-8" 3)Standards:DIN/SMS/ISO.. Sanitary Welding Butterfly Valve Material: SUS304, SUS316 Standard: DIN/SMS/3A/ISO/IDF Size:1"-8", or required Application: Pharmacy, beer, food, dairy, beverage, cosmetic, chemical industry. If you are interested in, please don't hesitate to contact us.