Definition of flap valve in English:

flap valve

Line breaks: flap valve
(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.

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Word of the day skosh
Pronunciation: skōSH
a small amount; a little