(also flapper valve)
A valve opened and closed by a plate hinged at one side.
More example sentences
- Its only moving parts are a spring-loaded ‘clack’ valve and a non-return flap valve.
- There the nozzle moves a flapper valve that seals the system out of the way.
- The divers were expected to start work tonight on installing a section of pipe and a flap valve to an existing culvert.
Definition of flap valve in:
- The British & World English dictionary