What is valve?

  • (noun): Device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone.
    See also — Additional definitions below


A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically valves fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure.

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Some articles on valve:

GLa DOS - Cultural Impact
... GLaDOS' popularity has led to merchandise being produced by both Valve and fans a t-shirt depicting GLaDOS, as well as other elements from Portal, was ... the latter which was also released by Valve ...
IOE Engine - Exhaust Over Intake (EOI)
... have been made with the reverse configuration, having the exhaust valve in the cylinder head and the intake valve in the block ... but this was changed to an overhead valve engine before production ended ... In 1936 and 1937, the Indian Four had the valve positions reversed, with the exhaust valve in the head and the inlet valve in the block ...
Piston Valve - Pneumatic Cannon
... A piston valve can also refer to a 2-way 2-position, pilot-operated spool valve ... popular among spud gun enthusiasts who often build homemade piston valves for use in pneumatic cannon ... Valves are typically constructed primarily from pipe fittings and machined plastics or metals ...
Interatrial Groove
... interventricular septum, trabeculae carneae, chordae tendineae, papillary muscle) · valves · cusps · Atrioventricular septum cardiac skeleton Intervenous tubercle Chambers Right heart (venae ...
Valve - Images
... Globe valve A valve controlled by a wheel Large butterfly valve Cast iron butterfly valve Cast iron butterfly valve Hastelloy ball valve Stainless steel gate valve Stainless steel gate valve ...

More definitions of "valve":

  • (noun): Control consisting of a mechanical device for controlling the flow of a fluid.
  • (noun): A structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it.