Ball valves generally use rubber, nylon and polytetrafluoroethylene as the material of the valve seat sealing ring, and what are its application fields?
Usually two-position adjustment, strict sealing performance, mud, wear, shrinking channel, quick opening and closing, high pressure cut-off, low noise, cavitation and gasification, a small amount of leakage to the atmosphere, small operating torque, small fluid resistance Ball valves are used in the piping system. At the same time, the ball valve is also suitable for the pipeline system of light structure, low pressure cut-off and corrosive medium. Ball valves can also be used in cryogenic devices and pipeline systems; in oxygen pipeline systems in the metallurgical industry, ball valves that have undergone strict degreasing treatment are required; and when the main lines in oil pipelines and gas pipelines need to be buried underground , a full-bore welded ball valve is required.
When selecting, it is required to consider the fire resistance and fire protection of the ball valve, especially in the petroleum, chemical, metallurgical and other departments, when using ball valves in equipment and pipeline systems with flammable and explosive media, more attention should be paid to fire resistance and fire protection.
