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Butterfly valve

 - 2 dictionary results

butterfly valve

–noun
1. a clack valve having two flaps with a common hinge.
2. a valve, as the throttle valve in a carburetor, that swings about a central axis across its face.

Origin:
1860–65
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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butterfly valve  


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n.  
  1. A disk turning on a diametrical axis inside a pipe, used as a throttle valve or damper.

  2. A valve composed of two semicircular plates hinged on a common spindle, used to permit flow in one direction only.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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