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Butterfly Valve vs Diaphragm valve

  • 2021-05-13 21:21

Diaphragm valves are used when the pressure is not very high, that is, medium and low pressure pipelines, and when there are strong corrosive media.

The butterfly valve can also be used in the same working condition, that is, it is rubber-lined.

Butterfly valves are used in more places than diaphragm valves, and there are more butterfly valves for water treatment. Butterfly valves also have high-end products, such as triple eccentric butterfly valves.



There is a "diaphragm" inside the diaphragm valve that moves with the valve stem, but the butterfly valve does not.

I have only seen diaphragm valves on acid tanks in power workshops. In short, they are needed to prevent severely corroded parts.

Provide animation comparison of two kinds of valves:

Butterfly valve

Diaphragm Valve

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