Definition of check valve
: a valve that permits flow in one direction only
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Recent Examples of check valve from the Web
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There is a vacuum check valve in the hose designed to maintain vacuum in the booster for brake application if the engine stalls.
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First, the source of moisture should be investigated and eliminated and then the check valve and hose assembly may need to be replaced.
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The company installed a new check valve to make sure the water flowed in the right direction and designed a new control system to prevent the problem from happening again.
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In heavy storms, the bypass serves as a sort of check valve to keep swollen rivers from over-topping the levees that protect Sacramento from flooding.
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That’s enough to provide strong engine response while the turbo gets up to speed, at which point a check valve closes and the turbo takes over from the electric supercharger.
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Check the manual to see if the PCV valve is a check valve or some other method for metering manifold vacuum into the crankcase.
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Bleed Paths: Small orifices (006) with one-way check valves allow fluid to bypass the compression spool valve during rebound and vice versa.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'check valve.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of check valve
circa 1877
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