check valve

noun

1. a valve permitting liquids or gases to flow in one direction only.

check valve

noun

1. a valve that closes by fluid pressure to prevent return flow Also callednonreturn valve

Word History and Origins

Origin of check valve¹

First recorded in 1875–80

Example Sentences

“The mega moon rocket’s still doing very well. We have one check valve — that is literally the only real issue we’ve seen so far,” said Tom Whitmeyer, deputy associate administrator for NASA’s exploration systems development division.

From Washington Post

The check valve the previous owner had installed broke during Hurricane Henri, in late August.

From Seattle Times

In a statement, the company said: "The failure of the titanium component in a high-pressure NTO environment was sufficient to cause ignition of the check valve and led to an explosion."

From BBC

The check valve was made of titanium.

From BBC

Even if her fabulous vibrato is mostly kept in check, “Valve Bone Woe” is successful, ear-catching and ear-caressing.

From Washington Times