Where ball valves are applicable

Because ball valves usually use rubber, nylon, and polytetrafluoroethylene as seat sealing materials, their temperature is limited by the seat sealing materials.Ball valve cut-off action is by the metal ball in the action of the medium, and the plastic seat between the mutual pressure to complete (floating ball ball valve).Under certain contact pressure, elastoplastic deformation occurs locally.This deformation can compensate for the manufacturing accuracy and surface roughness of the ball and ensure the sealing performance of the ball valve.

Generally, in the two-position adjustment, sealing performance is strict, mud, wear, shrinkage channel, quick opening and closing action (1/4 open and closing), high pressure cut-off (pressure difference is large), low noise, cavitation and gasification phenomenon, a small amount of leakage to the atmosphere, small operating torque, small fluid resistance in the pipeline system, the use of ball valve is recommended.

Because the valve seat sealing ring is usually made of plastic, so in the choice of the structure and performance of the ball valve, to consider the fireproof and fireproof ball valve, especially in the petroleum, chemical, metallurgy and other departments, in inflammable, explosive medium equipment and pipe system using ball valve, should pay attention to fireproof and fireproof.

Ball valves are also suitable for light construction, low pressure cut-off (low pressure difference), corrosive media pipeline system.

Ball valves can also be used in low temperature (cryogenic) devices and piping systems.

In the oxygen piping system of the metallurgical industry, ball valves with strict degreasing treatment should be used.

When the mains of oil and gas pipelines are buried underground, full-size welded ball valves shall be used.

When it is required to have regulating performance, it is necessary to choose a v-shaped opening of the special structure of the ball valve.

In petroleum, petrochemical, chemical, electric power, urban construction, the pipeline system with the operating temperature of more than 200℃ can choose the metal-to-metal sealed ball valve.