butterfly valve

noun

Definition of butterfly valve

1 : a valve consisting of two semicircular clappers hinged to a cross rib that permits fluid flow in only one direction
2 : a damper or valve in a pipe consisting of a disk turning on a bisecting axis

Examples of butterfly valve in a Sentence

Recent Examples on the Web The pipe typically features a butterfly valve—which is designed to regulate the flow of liquids or air—that has a rotating disk set on an axis. Daisy Hernandez, Popular Mechanics, "Wave Pool Suffers Huge Malfunction, Injures 44 People," 1 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'butterfly valve.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of butterfly valve

1809, in the meaning defined at sense 1

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Time Traveler for butterfly valve

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The first known use of butterfly valve was in 1809

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Cite this Entry

“Butterfly valve.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/butterfly%20valve. Accessed 6 December 2019.

More from Merriam-Webster on butterfly valve

Britannica.com: Encyclopedia article about butterfly valve

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