flap valve

American  

noun

1. clack valve.

---

Etymology

Origin of flap valve

First recorded in 1865–70

Example Sentences

See Examples For:

flap valve

A flap valve is provided between the two chambers to prevent the gasoline in the lower one from being sucked back into the upper one.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred

Refrigerator waste pipes, except in tenement houses, and all safe-waste pipes, must have brass flap valve on the lower ends.

From Elements of Plumbing by Dibble, Samuel Edward

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.

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)