Flap valve

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(Mech.) a valve which opens and shuts upon one hinged side; a clack valve.

See also: Flap

References in periodicals archive ?
Tenders are invited for provide all research, design, construct, testing, procurement, and transportation necessary to supply iid with one hundred forty-seven (147) 5 plastic flap valves, one hundred forty-seven (147) 8 plastic flap valves, one hundred forty-seven (147) 5 plastic slide valves and one hundredforty-seven (147) 8 plastic slide valves to replace aging equipment.
A dust-proof ejector cartridge due to external flap valves for clog-free operation.
Multi-stage pumps operate using flap valves that clog from ingested debris.
Residents were told that since September hundreds of highway gullies have been checked and cleaned, cleansing completed on overflow pipes, a sand blocked high level overflow near Newcomen Terrace cleaned and new flap valves installed and seven kilometres of sewers inspected.
Ventilation was provided by bellows, expiration occurring through a series of flap valves and water jars to maintain positive end-expiratory pressure (4,5).
Additionally, the Brahma flow path uses flap valves for maximum solids passage.
Our original Flip-Flap design not only provides minimum head loss through the unit but also ensures that under no circumstances can the seal between the two coupling body halves open to atmosphere, before the internal flap valves have been released and provided a 100 per cent shut off.
New pumping stations are proposed to reduce surface water flooding, while non-return flap valves would be fixed onto outfalls at Gunning's Bridge, to stop water flowing back up the culverts.
Locals say that gutters, culverts and flap valves have not been maintained and they're worried their homes could be flooded by sewage again.
A variety of ball and flap valves are available to suit the particular characteristics of different products.
Compressed air passing through the pump will entrain exterior air, which passes through rubber flap valves.
Johns River will require flap valves to prevent the tidal tailwater influence of the river and avoid re-suspension of the sediments.