One of the four valves in the heart, this valve is situated at exit of the left ventricle of the heart where the aorta (the largest of all arteries) begins. The aortic valve lets blood from the left ventricle be pumped up (ejected) into the aorta but prevents blood once it is in the aorta from returning to the heart.

One of the four valves of the heart, this one is situated between the left atrium and the left ventricle. It permits blood to flow one way only, from the atrium into the ventricle. The valve is more commonly called the mitral valve because its two flaps (cusps) makes it look like a bishop's miter or headdress.

One of the four valves of the heart, the mitral valve is situated between the left atrium and the left ventricle. It permits blood to flow one way: from the left atrium into the left ventricle. The mitral valve has two flaps (cusps) and so is called "mitral" because it looks like a bishop's miter or headdress. Also known as the bicus [..]

One of the four valves in the heart, the pulmonary valve stands at the opening from the right ventricle in the pulmonary artery trunk. It lets blood head in the right direction (toward the lungs) and keeps it from sloshing back from the pulmonary artery into the heart.

See Spitz-Holter valve.

One of the four heart valves, the tricuspid valve is the first one that blood encounters as it enters the heart. The tricuspid valve is situated between the right atrium and right ventricle and allows blood to flow only from the atrium into the ventricle.

A device to stop, start or regulate the flow of liquid or gas through or from piping.

In hydrologic terms, a device fitted to a pipeline or orifice in which the closure member is either rotated or moved in some way as to control or stop flow.

late 14c., "one of the halves of a folding door," from Latin valva (plural valvae) "section of a folding or revolving door," literally "that which turns," related to volv [..]

A valve is a mechanical device installed in a pipeline and used to control the flow of gas or liquid.

device used to control the flow of fluid through a passage.

A structure that restricts the flow of fluid to one direction only. Valves are found within veins in the human body where they prevent blood from flowing in the wrong direction.

A segment of a seed pod after the pod ripens and splits.

The part of a drip irrigation system that can move either manually or electronically to control water flow in the system.

– A device to control flow. Valves used in pressurized systems include:

a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it device in a brass wind instrument for varying the length of the air column to alter the pitch of a [..]

Are used to release water into either the distribution lines or into a sprinkler head, to retain water in a certain portion of the water distribution system or pumping station, to maintain a specified pressure and to drain lines.

A device which controls fluid flow direction, pressure, or flow rate.

Mechanical device for controlling or stopping flow of water in a pipe.

Device placed in a shunt system to regulate the rate and direction of CSF flow.

Vacuum tube that acts as an amplification component, also known simply as a tube. Since the silicon revolution this component has been replaced in amplification circuits with the transistor.

A device to stop, start or regulate the flow of liquid or gas through or from piping.

A hydraulic elevator mechanism that regulates the motion of the elevator by...

A device that regulates the flow of water.

A device by which the flow of liquid, air or other gas, loose material in bulk, or other such material can be started, stopped, or regulated by a movable part that opens or obstructs passage.

 - Device placed in a shunt system to regulate the rate and direction of CSF flow.

[Fruit details] -- One of the flaps/parts/sides opening on a dehiscent fruit.

(n) a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it(n) device in a brass wind instrument for varying the length of the air column to alter the pit [..]

  A device for controlling the passage of fluid through a pipe, allowing movement in one direction only.

  The valve closing the opening between the auricle and ventricle of the left side of the heart.

  The valve at the entrance to the pulmonary trunk from the right ventricle.

  The valve closing the opening between the right auricle and ventricle of the heart.

Mechanical device (in the shunt) which regulates the flow by opening and closing.

The mechanical hardware that creates damping.

a device that controls flow by opening and closing. For instance, fuel valve controls flow of fuel from fuel tank to carburetor. Intake valve controls flow of air-fuel mixture into cylinder.

A device which controls fluid flow direction, pressure, or flow rate. Vibration Mount A rubber device located between the engine or generator and the cradle to minimize vibration.

A device that regulates the flow of water.

A mechanical device that is used in a fluid power system, which is used to provide some change of state of the fluid.

These open or close to admit air to the pipe. Their movement is controlled through the keys on the keyboard. Pressing a key down pulls the valve open. Each key has a spring underneath it so that the k [..]

a device that regulates the flow of substances (gases, fluidized solids, slurries, or liquids) by opening, closing, or partially obstructing various passageways. Valves are technically pipe fittings, but usually are discussed separately.

Any device modifying or closing off the passage of fluid through a pipe.

A device which enables or prevents the flow of a gas or liquid from one place to another by opening up or closing down. Most internal combustion engines use intake and exhaust valves to allow air-fuel [..]

Device which controls the flow of air. Usually operated by a pouch, pneumatic, key or other mechanism.

A unit of pressure controlling equipment with a bore ( Run ) between End Connections containing a closing mechanism to stop and seal any flow through the bore.

The valve between the left ventricle and the ascending Aorta which prevents backflow into the left ventricle.

Flaps of Tissue that prevent regurgitation of Blood from the Heart Ventricles to the Heart Atria or from the Pulmonary Arteries or Aorta to the ventricles.

The valve, at the junction of the Cecum with the Colon, that guards the opening where the Ileum enters the Large Intestine.

The valve between the left atrium and left ventricle of the Heart.

Abnormal protrusion or billowing of one or both of the leaflets of Mitral Valve into the LEFT ATRIUM during Systole. This allows the backflow of Blood into left atrium leading to Mitral Valve Insuffic [..]

A valve situated at the entrance to the pulmonary trunk from the right ventricle.

The valve consisting of three cusps situated between the right atrium and right ventricle of the Heart.

Flaps within the Veins that allow the Blood to flow only in one direction. They are usually in the medium size Veins that carry Blood to the Heart against gravity.

Mechanism that controls rate and amount of flow through an aperture.

A membranous structure that closes to prevent the backward flow of material through a canal or passage.

(s

 see Valva

Device used for controlling fluid flow.

Refers to a move that opens up one particular path or line (of squares) and closes another (as the Pawn or Piece moves forward, it blocks a pathway that had, until then, been open).

A move which simultaneously opens one line of play while closing another.

In hydrologic terms, a device fitted to a pipeline or orifice in which the closure member is either rotated or moved in some way as to control or stop flow.

A device used to either open or close an opening to allow or prevent the flow of a liquid or gas from one place to another. Mostly, valves are spoken of about an engine as they are in an engine to ope [..]

Typically, a multi-ported valve used by service technicians to isolate remote system components, as well as check pressures and charge refrigerating units.

Valve actuated by magnetic action by means of an electrically energized coil.

A device that dispenses, dissipates or distributes energy in a system. (Learn More)

A device used to control the rate of flow in a line to open or shut off a line completely, or to serve as an automatic or semiautomatic safety device. Those used extensively include the check valve, g [..]

a physical device that can regulate or control the flow of oil or gas on a pipeline.

a device which controls fluid flow direction, pressure, or flow rate.

a valve whose primary function is to provide an alternate flow path.

a valve whose primary function is to direct or prevent flow through selected passages.

a directional control valve which modulates flow or pressure as a function of its input signal.

valve whose primary function is to control flow rate.

a pressure control valve whose primary function is to limit system pressure.

valve whose primary function is to limit differential pressure.

A device used to control the flow of fluid

A small valve on a pipeline, pump, or tank from which samples are drawn or to vent air or oil; sample valve.

A large heavy-duty valve on a crude oil or products trunk line placed on each side of a pipeline river crossing to isolate possible leaks at the crossing.

A valve that is set to open when pressure on a liquid or gas line reaches a predetermined level; a pop-off valve.

(Remotely Operated) - A mechanical device that prevents flow of a product within a pipeline and is designed to operate upon receipt of a signal transmitted from another location.

a fold of membranes that controls the flow of a fluid

One part of a two part shell as in bivalves and mussels.

In hydrologic terms, a device fitted to a pipeline or orifice in which the closure member is either rotated or moved in some way as to control or stop flow.

An engine component that regulates the flow of air and fuel into the combustion chamber as well as the release of exhaust for that chamber. The rate at which the valves open and close is controlled by [..]

A valve which can be positioned anywhere between fully on and fully off to proportion the rate of flow in response to a modulating controller (see modulating control).

A form of globe valve that contains a sharp pointed, needle like plug that is driven into the and out of a cone shaped seat to accurately control a relatively small rate of flow of a fluid.

A spring loaded safety valve that opens automatically when pressure exceeds the limits for which the valve is set. It is used a safety device on pressurized vessels and other equipment to prevent dama [..]

A device that controls the rate of flow of fluid in a line or opens or shuts of the flow of fluid completely. When open, the sealing surface of the valve is moved away from a seat. When closed, the se [..]

A valve designed to minimize the possibility of explosion when air temperature surrounding a refrigeration system may rise to a point where the pressure of the refrigerant gas to increase to a danger [..]

Also called pressure relief valve.

POSITION - A valve which is either fully on or fully off with no positions between. Also called an "on-off valve".

Software developer of such software games as Half-life, Counter-strike, and Day of Defeat.

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 a [..]

A valve is a device that regulates the flow of fluids. Valve may also refer to:

A mollusc valve is each articulating part of the shell of a mollusc. Each part is known as a valve or in the case of chitons, a "plate". Members of two classes of molluscs: the Bivalvia (clams) and th [..]