clapper valve


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Noun1.clapper valve - a simple valve with a hinge on one sideclapper valve - a simple valve with a hinge on one side; allows fluid to flow in only one direction
valve - control consisting of a mechanical device for controlling the flow of a fluid
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While the technician was performing this work, a clapper valve in the dry system opened and released water into the system at a rate of 100 pounds per square inch.