Diaphragm valve

A diaphragm valve, or membrane valve, consists of a valve body with two or more ports, a flexible diaphragm, and a weir, saddle, or seat upon which the diaphragm closes the valve. The valve body may be constructed from plastic, metal or other materials depending on the intended use.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

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