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because this valve has a centric line through it, and control by a stem going through the disc and drive it open just like a wing of butterfly, that is why it is called butterfly valve

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william Han

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3y ago

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A butterfly valve is from a family of valves called quarter-turn valves. The "butterfly" is a metal disc mounted on a rod.

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Wiki User

10y ago
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Q: Why called butterfly for butterfly valve?
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