clack valve

clack valve

noun
a valve having a hinged flap permitting flow only in the direction in which the flap opens.
Also called flap valve.


Origin:
1855–60

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
clack valve

noun
a simple valve with a hinge on one side; allows fluid to flow in only one direction 
WordNet® 3.0, © 2006 by Princeton University.
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