flap valve

American  

noun

1. clack valve.

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Etymology

Origin of flap valve

First recorded in 1865–70

Example Sentences

See Examples For:

flap valve

Good engines are provided with a plug or flap valve.

From Gas-Engines and Producer-Gas Plants A Practice Treatise Setting Forth the Principles of Gas-Engines and Producer Design, the Selection and Installation of an Engine, Conditions of Perfect Operation, Producer-Gas Engines and Their Possibilities, the Care of Gas-Engines and Producer-Gas Plants, with a Chapter on Volatile Hydrocarbon and Oil Engines by Mathot, R. E.

It consists of a cylindrical chamber, a, ending in a narrower tube, c, which forms the seating for a flap valve, d, to which the hammer or clapper, e, is fixed.

From Scientific American Supplement, No. 458, October 11, 1884 by Various

First of all, a flap valve under such conditions would not remain watertight, unless it were attended to almost every day, which is, of course, impracticable when the outlet is below water.

From The Sewerage of Sea Coast Towns by Adams, Henry C.

The churned-up soil is removed by a sand pump, which is a hollow tube with a flap valve at the lower end opening inwards and a hook on the upper end.

From Rural Hygiene by Ogden, Henry N. (Henry Neely)

Schemes have been suggested in which it was proposed to utilise a flap valve on the outlet so as to render the discharge of the sewage automatic.

From The Sewerage of Sea Coast Towns by Adams, Henry C.