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Valve   /vælv/   Listen
noun
Valve  n.  
1.
A door; especially, one of a pair of folding doors, or one of the leaves of such a door. "Swift through the valves the visionary fair Repassed." "Heavily closed,... the valves of the barn doors."
2.
A lid, plug, or cover, applied to an aperture so that by its movement, as by swinging, lifting and falling, sliding, turning, or the like, it will open or close the aperture to permit or prevent passage, as of a fluid. Note: A valve may act automatically so as to be opened by the effort of a fluid to pass in one direction, and closed by the effort to pass in the other direction, as a clack valve; or it may be opened or closed by hand or by mechanism, as a screw valve, or a slide valve.
3.
(Anat.) One or more membranous partitions, flaps, or folds, which permit the passage of the contents of a vessel or cavity in one direction, but stop or retard the flow in the opposite direction; as, the ileocolic, mitral, and semilunar valves.
4.
(Bot.)
(a)
One of the pieces into which a capsule naturally separates when it bursts.
(b)
One of the two similar portions of the shell of a diatom.
(c)
A small portion of certain anthers, which opens like a trapdoor to allow the pollen to escape, as in the barberry.
5.
(Zool.) One of the pieces or divisions of bivalve or multivalve shells.
Air valve, Ball valve, Check valve, etc. See under Air. Ball, Check, etc.
Double-beat valve, a kind of balance valve usually consisting of a movable, open-ended, turban-shaped shell provided with two faces of nearly equal diameters, one above another, which rest upon two corresponding seats when the valve is closed.
Equilibrium valve.
(a)
A balance valve. See under Balance.
(b)
A valve for permitting air, steam, water, etc., to pass into or out of a chamber so as to establish or maintain equal pressure within and without.
Valve chest (Mach.), a chamber in which a valve works; especially (Steam Engine), the steam chest; called in England valve box, and valve casing. See Steam chest, under Steam.
Valve face (Mach.), that part of the surface of a valve which comes in contact with the valve seat.
Valve gear, or Valve motion (Steam Engine), the system of parts by which motion is given to the valve or valves for the distribution of steam in the cylinder. For an illustration of one form of valve gear, see Link motion.
Valve seat. (Mach.)
(a)
The fixed surface on which a valve rests or against which it presses.
(b)
A part or piece on which such a surface is formed.
Valve stem (Mach.), a rod attached to a valve, for moving it.
Valve yoke (Mach.), a strap embracing a slide valve and connecting it to the valve stem.





Collaborative International Dictionary of English 0.48


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"Valve" Quotes from Famous Books



... a dandy pump," went on Cole. "I put a new kind of valve in this morning, and she squirts a hundred feet ...
— The Young Firemen of Lakeville - or, Herbert Dare's Pluck • Frank V. Webster
... the car, grumbling incoherent phrases. He affected to busy himself with the mechanism that had just been readjusted, looking at it wisely, thumbing a valve, though with a care to leave things precisely as ...
— The Wrong Twin • Harry Leon Wilson
... heifer, Mr. Ball, the grocer, would accommodate you. When Mrs. Pomfret's cook became inebriate and refractory, Mr. Ball was sent for, and enticed her to the station and on board of a train; when the Chillinghams' tank overflowed, Mr. Ball found the proper valve and saved the house from being washed away. And it was he who, after Mrs. Pomfret, took the keenest interest in Mr. Crewe's campaign. At length came one day when Mr. Crewe pulled up in front of the grocery store and called, as his custom was, loudly for Mr. Ball. The fact that Mr. Ball was ...
— The Crossing • Winston Churchill
... impression among the Twiddlers was that Mr. Biles supplied an exceedingly thin and watery fluid; and one day when the judge stepped over to pay his quarterly bill he determined to make complaint. He found Mr. Biles in the yard mending the valve of his pump; and when the judge made a jocular remark to the effect that the dairy must be in a bad way when the pump was out of order, Mr. Biles, rising with his ...
— Elbow-Room - A Novel Without a Plot • Charles Heber Clark (AKA Max Adeler)
... partition into halves, has symmetrical openings in the front walls, which permit the light to reach two white fields placed upon the back walls. If one looks in through the observation tube, both halves are seen to be exactly alike, and the white fields equally illuminated. A valve is then fitted to one of the front openings, so that the light in that half of the photometer may be gradually diminished. Its white field is thus darkened by measured degrees, and becomes black when all light is excluded by the closed valve. While this darkening process goes ...
— A Color Notation - A measured color system, based on the three qualities Hue, - Value and Chroma • Albert H. Munsell


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