The ISOO 5211 platform is designed with two disc springs that automatically compress the filling material. The high platform ball valve stem is designed to prevent flying out, and the anti-static double-layer stem packing meets the stem leakage testing requirements of German TUV TA-LUFT. Applicable media: water, gas, oil, natural gas, and acidic or alkaline corrosive media Applicable temperature: ≤ 300 ℃, driving modes: manual, worm gear transmission, pneumatic, electric, hydraulic, etc.