A slide valve with a cup-like cavity in its face, through which exhaust steam passes.

plural of freeze valve

plural of Kingston valve

A valve fitted in the bottom of a ship's fuel, water or ballast tank that allows seawater to enter for the purposes of cleaning and to admit water ballast.

plural of safety-valve

Alternative form of safety valve

(chiefly historical) An electronic device incorporating electrons from a glowing cathode inside an evacuated glass tube, functioning as a switch, amplifier etc.

(in an internal combustion engine) a valve through which the products of combustion escape from the cylinder to the manifold

A relief valve set to open at a pressure below that at which a container (such as a boiler) would burst. / (figuratively) Any mechanism offering relief from pressure or tension, e.g. emotionally.

A liquid used to lubricate valves in brass instruments.