valve : Idioms & Phrases

• a valve to regulate the admission or egress of air; esp. a valve which opens inwardly in a steam boiler and allows air to enter.

Webster 1913

• etc. See under Air. Ball, Check, etc.

Webster 1913

• noun a semilunar valve between the left ventricle and the aorta; prevents blood from flowing from the aorta back into the heart
  

WordNet

• noun either of two heart valves through which blood flows from the atria to the ventricles; prevents return of blood to the atrium
  

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• a valve whose surfaces are so arranged that the fluid pressure tending to seat, and that tending to unseat the valve, are nearly in equilibrium; esp., a puppet valve which is made to operate easily by the admission of steam to both sides. See Puppet valve.

Webster 1913

• . See Balance valve, under Balance, n.

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• noun any valve that checks flow by the seating of a ball
  

WordNet

• (Mach.), a contrivance by which a ball, placed in a circular cup with a hole in its bottom, operates as a valve.

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• noun valve with two cusps; situated between the left atrium and the left ventricle
  left atrioventricular valve; bicuspid valve.
  

WordNet

Blow" valve`

Definitions

1. (Mach.) See Snifting valve.

Webster 1913

• noun a valve in a carburetor that consists of a disc that turns and acts as a throttle
  

WordNet

• (Mech.), a kind of double clack valve, consisting of two semicircular clappers or wings hinged to a cross rib in the pump bucket. When open it somewhat resembles a butterfly in shape.

Webster 1913

• noun a valve to control one-way flow of blood
  cardiac valve.
  

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• (Mech.), a valve in the feed pipe of a boiler to prevent the return of the feed water.

Webster 1913

• noun a simple valve with a hinge on one side; allows fluid to flow in only one direction
  clack valve; clack.
  

WordNet

• (Mach.), a valve; esp. one hinged at one edge, which, when raised from its seat, falls with a clacking sound.

Webster 1913

• noun a simple valve with a hinge on one side; allows fluid to flow in only one direction
  clack valve; clack.
  

WordNet

D" valve`

Definitions

1. (Mech.) A kind of slide valve. See Slide valve, under Slide.

Webster 1913

• 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.

Webster 1913

• . (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.

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• noun a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level
  escape; relief valve; escape valve; escape cock.
  

WordNet

• (Steam Engine), a relief valve; a safety valve. See under Relief, and Safety.

Webster 1913

• (Anat.), a crescent-shaped fold of the lining membrane of the heart at the entrance of the vena cava inferior. It directs the blood towards the left auricle in the fetus, but is rudimentary and functionless in the adult.

Webster 1913

• noun a valve through which burned gases from a cylinder escape into the exhaust manifold
  

WordNet

• (Steam Engine), a valve that lets exhaust steam escape out of a cylinder.

Webster 1913

• (Steam Engine), a cut-off valve, to shut off steam from the cylinder before the end of each stroke.

Webster 1913

• (Mech.), a valve which opens and shuts upon one hinged side; a clack valve.

Webster 1913

• a valve or cock acted upon by a float. See Float, 1 (b).

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• (Steam Engine), the valve that opens to the air pump from the condenser.

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• a valve to drain the portion of a pipe, hydrant, pump, etc., where water would be liable to freeze.

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• . (a) A ball valve. (b) A valve inclosed in a globular chamber. Knight.

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• (Steam Engine), a slide valve with several parallel perforations corresponding to openings in the seat on which the valve moves.

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• noun a valve to control one-way flow of blood
  cardiac valve.
  
• noun an implant that replaces a natural cardiac valve
  

WordNet

• . (Mach.) (a) A valve for regulating the distribution of water in the cylinders of hydraulic elevators, cranes, etc. (b) (Gas Works) An inverted cup with a partition dipping into water, for opening or closing communication between two gas mains, the open ends of which protrude about the water.

Webster 1913

• noun valve between the ileum of the small intestine and the cecum of the large intestine; prevents material from flowing back from the large to the small intestine
  

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• a pipe, passageway, or valve, for leading or admitting a fluid to a receiver, as steam to an engine cylinder, or water to a pump.

Webster 1913

• (Steam Eng.), the cock or valve through which cold water is admitted into a condenser.

Webster 1913

• noun a valve that controls the flow of fluid through an intake
  

WordNet

King"ston valve

Definitions

1. (Marine Steam Engin.) A conical valve, opening outward, to close the mouth of a pipe which passes through the side of a vessel below the water line.

Webster 1913

• a valve which moves on a hinge.

Webster 1913

• noun valve with two cusps; situated between the left atrium and the left ventricle
  left atrioventricular valve; bicuspid valve.
  

WordNet

• noun valve with two cusps; situated between the left atrium and the left ventricle
  left atrioventricular valve; bicuspid valve.
  

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• noun cardiopathy resulting from the mitral valve not regulating the flow of blood between the left atrium and left ventricle of the heart
  

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• noun obstruction or narrowing of the mitral valve (as by scarring from rheumatic fever)
  mitral stenosis.
  

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• (Steam Eng.), a slide valve, consisting of a piston, or connected pistons, working in a cylindrical case which is provided with ports that are traversed by the valve.

Webster 1913

• (Mech.), a tapering valve, which turns in a case like the plug of a faucet.

Webster 1913

• noun a mushroom-shaped valve that rises perpendicularly from its seat; commonly used in internal-combustion engines
  poppet.
  

WordNet

• a valve covering a round hole or the end of a pipe or pump barrel, resembling a potlid in form.

Webster 1913

• (Steam Eng.), a spring safety valve applied to the cylinder of a steam engine for discharging water carried into the cylinder by priming.

Webster 1913

• noun a semilunar valve between the right ventricle and the pulmonary artery; prevents blood from flowing from the artery back into the heart
  

WordNet

• a valve in the form of a circular disk, which covers a hole in its seat, and opens by moving bodily away from the seat while remaining parallel with it, used in steam engines, pumps, safety valves, etc. Its edge is often beveled, and fits in a conical recess in the seat when the valve is closed. See the valves shown in Illusts. of Plunger pump, and Safety valve, under Plunger, and Safety.

Webster 1913

• noun the sphincter muscle of the pylorus that separates the stomach from the duodenum
  pyloric sphincter; musculus sphincter pylori.
  

WordNet

• noun a thermionic tube having two electrodes; used as a rectifier
  rectifying tube; diode.
  

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• a device for automatically maintaining a diminished pressure of steam, air, gas, etc., in a pipe, or other receiver, which is fed from a boiler or pipe in which the pressure is higher than is desired in the receiver.

Webster 1913

• noun a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level
  escape; relief valve; escape valve; escape cock.
  

WordNet

• a valve arranged for relieving pressure of steam, gas, or liquid; an escape valve.

Webster 1913

• noun valve with three cusps; situated between the right atrium and the right ventricle; allows blood to pass from atrium to ventricle and closes to prevent backflow when the ventricle contracts
  right atrioventricular valve.
  

WordNet

• a valve acting by continuous or partial rotation, as in the four-way cock.

Webster 1913

• noun a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level
  escape; relief valve; escape valve; escape cock.
  

WordNet

• a valve which is held shut by a spring or weight and opens automatically to permit the escape of steam, or confined gas, water, etc., from a boiler, or other vessel, when the pressure becomes too great for safety; also, sometimes, a similar valve opening inward to admit air to a vessel in which the pressure is less than that of the atmosphere, to prevent collapse.

Webster 1913

• a stop valve which is opened or closed by a screw.

Webster 1913

• (Anat.), the valves at the beginning of the aorta and of the pulmonary artery which prevent the blood from flowing back into the ventricle.

Webster 1913

• noun a heart valve with cusps shaped like half-moons; prevents blood from flowing back into the heart
  

WordNet

• . (Anat.) See Semilunar valves, under Semilunar.

Webster 1913

• noun valve that opens and closes a passageway by sliding over a port
  

WordNet

• . (a) Any valve which opens and closes a passageway by sliding over a port . (b) A particular kind of sliding valve, often used in steam engines for admitting steam to the piston and releasing it, alternately, having a cuplike cavity in its face, through which the exhaust steam passes. It is situated in the steam chest, and moved by the valve gear. It is sometimes called a D valve, a name which is also applied to a semicylindrical pipe used as a sliding valve.

Webster 1913

• noun regulator consisting of a valve or gate that controls the rate of water flow through a sluice
  floodgate; head gate; sluicegate; penstock; water gate.
  

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• a small valve opening into the atmosphere from the cylinder or condenser of a steam engine, to allow the escape of air when the piston makes a stroke; so called from the noise made by its action.

Webster 1913

• a valve that can be closed or opened at will, as by hand, for preventing or regulating flow, as of a liquid in a pipe; in distinction from a valve which is operated by the action of the fluid it restrains.

Webster 1913

• a valve which, when opened widely, affords a straight passageway, as for water.

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• the induction pipe, and induction valve, of a pump, respectively.

Webster 1913

• noun electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  vacuum tube; tube; electron tube; thermionic vacuum tube; thermionic tube.
  

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• noun a valve that regulates the supply of fuel to the engine
  throttle; accelerator.
  

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• (Steam Engine), a valve moved by hand or by a governor for regulating the supply of steam to the steam chest. In one form it consists of a disk turning on a transverse axis.

Webster 1913

• noun valve with three cusps; situated between the right atrium and the right ventricle; allows blood to pass from atrium to ventricle and closes to prevent backflow when the ventricle contracts
  right atrioventricular valve.
  

WordNet

• (Anat.), the valve, consisting of three triangular membranous flaps, at the opening of the right auricle into the right ventricle in the heart of most mammals; sometimes called the tricuspid valves, each flap being regarded as a valve.

Webster 1913

• in an automatic air brake for railroad cars, the valve under each car, by means of which the brake is controlled by a change of pressure in the air pipe leading from the locomotive.

Webster 1913

• (Mach.), a valve which shuts by being lifted against a seat facing downward.

Webster 1913

• a safety valve opening inward to admit air to a vessel in which the pressure is less than that of the atmosphere, in order to prevent collapse.

Webster 1913

• (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.

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• (Mach.), that part of the surface of a valve which comes in contact with the valve seat.

Webster 1913

• (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.

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• noun a lever pivoted at the center; used especially to push a valve down in an internal-combustion engine
  rocker arm.
  

WordNet

• . (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.

Webster 1913

• (Mach.), a rod attached to a valve, for moving it.

Webster 1913

• (Mach.), a strap embracing a slide valve and connecting it to the valve stem.

Webster 1913

• noun internal-combustion engine having both inlet and exhaust valves located in the cylinder head
  

WordNet

Valve"-shell` noun

Definitions

1. (Zoöl.) Any fresh-water gastropod of the genus Valvata.

Webster 1913