... Seat: Silicone, EPDM and Viton is available. Sanitary Butterfly Valve:Valve Body Material: SS304 or SS316L.Vlave Handle Material: SS304 ... - 4", any size is demandable. Fitting ends: Welding ends, Male ends, Clamp ends, Liner ends and wafer flange.Standard: DIN, SMS, ISO ... ...etc.Our factory main produce the butterfly valve, check valve,gate valve, globel valve and pipe fitting etc Sanitary ...