Meaning of clack valve | Babel Free

Definitions

A valve; especially one hinged at one edge, which, when raised from its seat, falls with a clacking sound.

Examples

“The connecting pipe between a locomotive injector and the boiler, through which the water is forced into the boiler against the steam pressure within, is provided with a "clack-valve," which allows the water to pass⟳ in the inward direction only and not the outward; this is housed in a "clack-box". No question⟳ of "advantages or disadvantages" attaches to the use⟳ of a clack-box; it is a necessary part of locomotive equipment.”

“The feed⟳ water enters the back and cool end⟳ of the preheater and passes forward⟳ to the front and hot end⟳, after which it enters the boiler through a clack valve.”

CEFR level