Application field and application method of large ball valve
Release time:
2023-05-28
This field is very extensive in the application of ball valves, which can be used in heavy production fields such as petroleum, metallurgy, chemical industry, etc,
Ball valves usually use rubber, nylon, and polytetrafluoroethylene as seat sealing ring materials, so their usage temperature is limited by the seat sealing ring material. The cut-off function of a ball valve is achieved by pressing the metal ball against the plastic valve seat under the action of the medium (floating ball valve). Under a certain contact pressure, the valve seat sealing ring undergoes elastic-plastic deformation in local areas. This deformation can compensate for the manufacturing accuracy and surface roughness of the ball, ensuring the sealing performance of the ball valve.
Due to the fact that the valve seat sealing ring of ball valves is usually made of plastic, it is necessary to consider the fire resistance and fire resistance of ball valves when selecting their structure and performance. Especially in departments such as petroleum, chemical, and metallurgical industries, when using ball valves in equipment and pipeline systems with flammable and explosive media, attention should be paid to fire resistance and fire resistance.
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