... :DN25-DN100 4 Sealing material: EPDM, Silicone, Viton sanitary manual reversing valve Specification: DN10-2 and 1/2 "6" Material: 304, 316 ... Sealing ring: EPDM, FPM, Q, PTFE etc Driving mode: manual, pneumatic, etc Connection: welding type, KaGuShi, screw type, flange, to the ... products, food, beer, beverage, biological medicine, cosmetics, etc sanitary manual reversing valve