a valve permitting liquids or gases to flow in one direction only.
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Origin of check valve
First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for check valve
In the first case, the pipe is provided with a stop-cock, mounted adjacent to the cylinder, and with a check-valve.Gas-Engines and Producer-Gas Plants|R. E. Mathot
British Dictionary definitions for check valve
a valve that closes by fluid pressure to prevent return flowAlso 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