Valve Corporation, also known as Valve Software, is an American video game developer, publisher, and digital distribution company headquartered in Bellevue...

A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening...

storefront developed by Valve. It was launched as a software client in September 2003 to provide video game updates automatically for Valve's games and expanded...

instrument valve, for valves used in brass instruments Rotary valve, a valve using an internal rotor to select flow paths Piston valve, a valve using a piston...

heart valves closing in a healthy 16 year old girl. The stethoscope is at the tricuspid area. Problems playing this file? See media help. A heart valve (cardiac...

The Schrader valve (also called American valve (AV)) is a type of pneumatic tire valve used on virtually every motor vehicle in the world today. The original...

Mitral Valve Prolapse murmur at mitral area Heart sounds of a 16-year-old girl diagnosed with mitral valve prolapse and mitral regurgitation. Auscultating...

A solenoid valve is an electromechanically operated valve. Solenoid valves differ in the characteristics of the electric current they use, the strength...

A poppet valve (also sometimes called mushroom valve) is a valve typically used to control the timing and quantity of petrol (gas) or vapour flow into...

The mitral valve (/ˈmaɪtrəl/ MY-trəl), also known as the bicuspid valve or left atrioventricular valve, is one of the four heart valves. It has two cusps...

aortic valve is a valve in the heart of humans and most other animals, located between the left ventricle and the aorta. It is one of the four valves of the...

The Presta valve (also French valve (FV) or Sclaverand valve) is a type of tire valve commonly found on high pressure bicycle inner tubes and is commonly...

A multi-valve or multivalve four-stroke internal combustion engine is one where each cylinder has more than two valves – more than the minimum required...

Bicuspid aortic valve (BAV) is a form of heart disease in which two of the leaflets of the aortic valve fuse during development in the womb resulting...

An overhead valve engine, abbreviated (OHV) and sometimes called a pushrod engine, is a piston engine whose valves are located in the cylinder head above...

alter the pitch instead of the valves used by other brass instruments. The valve trombone is an exception, using three valves similar to those on a trumpet...

A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise...

variations) is a valve controlling the release of a fluid. Tap is used in the United Kingdom and most of the Commonwealth for any everyday type of valve, particularly...

A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to...

service valve is a valve used to separate one piece of equipment from another in any system where liquids or gases circulate. Two types of service valves are...

Mitral Valve Prolapse murmur Heart sounds of a 16-year-old girl diagnosed with mitral valve prolapse and mitral regurgitation. Auscultating her heart,...

A thermal expansion valve or thermostatic expansion valve (often abbreviated as TEV, TXV, or TX valve) is a component in vapor-compression refrigeration...

(the flush valve seat) by water pressure. The user pushes a lever to flush the toilet, which lifts the flush valve from the valve seat. The valve then floats...

Valve leakage refers to flow through a valve which is set in the 'off' state. The importance of valve leakage depends on what the valve is controlling...

Mitral Valve Prolapse murmur at mitral area Heart sounds of a 16-year-old girl diagnosed with mitral valve prolapse and mitral regurgitation. Auscultating...

A vacuum tube, electron tube, thermionic valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum...

their actuation in different directions. A desmodromic valve is a reciprocating engine poppet valve that is positively closed by a cam and leverage system...

Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy...

The Dunlop valve, (abbreviated as DV; also called a Woods valve, an English valve or a Blitz valve) is a type of pneumatic valve stem in use—mostly on...

Aortic valve replacement is a cardiac surgery procedure whereby a failing aortic valve is replaced with an artificial heart valve. The aortic valve may need...