- a device for controlling the flow of air, as from a pipe or tank.
Examples from the Web for air valve
Historical Examples of air valve
It was the kind of door that shuts with an air-valve, and it closed gradually, tranquilly, like velvet; a perfect lady of a door.Life's Minor Collisions
He stopped the engines, opened the air-valve, and the great ship instantly began to settle quietly down.With Airship and Submarine
The professor opened the air-valve and the ship at once began to settle down.The Log of the Flying Fish
If now the air-valve be opened very slightly, an internal cone of the same blue colour makes its appearance.
- a device for controlling the flow of air in a pipe
- a valve for exhausting air from a fluid system, esp from a central-heating installationSee also bleed valve