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check valve

noun
1.
a valve permitting liquids or gases to flow in one direction only.
Origin
1875-1880
1875-80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for check valve
  • The pipe is fitted with a check valve that permits water to flow in only one direction.
  • The check valve must be located upstream from the injection point.
  • The fire was caused by oil and gas which backed up through a malfunctioning check valve in the generator drip pan drain.
  • The bailer is pulled up when the desired depth is reached, with the weight of the water closing the check valve.
  • Functional main water line check valve and main water line low pressure drain.
  • The check valve in question diverts air between the diesel turbocharger and integral air-blower.
British Dictionary definitions for check valve

check valve

noun
1.
a valve that closes by fluid pressure to prevent return flow Also called nonreturn valve
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Difficulty index for check valve

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Word Value for check

16
17
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