Help – What is an automatic air valve?
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This post was last edited by 955559 on 2018-11-30 09:03. Teachers, what is an automatic air valve?
An air valve is a special type of valve used to prevent negative pressure from forming within the pipe due to decompression waves during transient processes. It is usually installed at the high points where the dynamic water pressure is low during normal pipeline operation, and where liquid column separation may occur during transient flow. Air is drawn in when the pressure inside the pipe is lower than atmospheric pressure, and air is expelled when the pressure in the pipe rises above atmospheric pressure. During the exhaust process, when the liquid in the pipe fills it, the valve can close automatically to prevent the liquid from escaping into the atmosphere.
Are there any pictures of this type of valve? Share one!