Sealing Requirements For Valves
- Dec 03, 2018 -

The sealing performance of the valve refers to the ability of each sealing part of the valve to prevent the leakage of the medium, which is the most important technical performance index of the valve. There are three sealing parts of the valve: the contact place between the opening and closing parts and the two sealing surface of the seat, the coordination between the filler and the stem and the filler letter, and the connection between the valve body and the valve cover. The leak in the previous one is called an internal leak, which is commonly referred to as LAX, and it will affect the valve's ability to truncate the medium. For truncated valve classes, internal leaks are not allowed. The leak in the latter two places is called an external leak, that is, the medium leaks from the valve to the outside of the valve. Leakage will cause material loss, pollution of the environment, serious will also cause accidents. For flammable, explosive, toxic or radioactive media, leakage is not allowed, so the valve must have a reliable sealing performance.

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