Valve-sparing aortic root replacement — (also known as the David procedure) is a cardiac surgery procedure involving replacement of the aortic root without replacement of the aortic valve. Two similar procedures were developed, one by Sir Magdi Yacoub,[1] and another by Tirone David.… … Wikipedia
Valve — This article is about the flow control device. For the game developer, see Valve Corporation. For the electronic component, see Vacuum tube. For other uses, see Valve (disambiguation). These water valves are operated by handles. A valve is a… … Wikipedia
Valve amplifier — A valve amplifier or tube amplifier is a type of electronic amplifier that make use of vacuum tubes instead of solid state semiconductor devices (such as transistors). As any other electronic amplifier they serve to increase the power and/or… … Wikipedia
Valve logique — Sommaire 1 Les valves logiques 2 Avantages par rapport aux appareils traditionnels 3 Inconvénients 4 Fonctions … Wikipédia en Français
Valve shim — A valve shim is a disc of hardened metal of precisely calibrated height used to adjust the clearance (US:lash) between a cam lobe and the valve on which it operates where the cam lobe operates directly on the valve without an intermediate rocker… … Wikipedia
reducing valve — redukcinis vožtuvas statusas T sritis Energetika apibrėžtis Vožtuvas, automatiškai praleidžiantis skystį arba dujas iš didesnio slėgio ertmės į mažesnio slėgio ertmę ir palaikantis pastovų slėgį vienoje iš ertmių. atitikmenys: angl. reducing… … Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas
soupape de réduction — redukcinis vožtuvas statusas T sritis Energetika apibrėžtis Vožtuvas, automatiškai praleidžiantis skystį arba dujas iš didesnio slėgio ertmės į mažesnio slėgio ertmę ir palaikantis pastovų slėgį vienoje iš ertmių. atitikmenys: angl. reducing… … Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas
brake control valve — A valve in the aircraft brake system that controls the amount of hydraulic pressure applied to wheel brakes. The pressure is applied to the brakes whenever either the brake pedals are depressed or a hand brake lever is pulled. The brake control… … Aviation dictionary
PCV valve — The Positive Crankcase Ventilation valve, or PCV valve, is a one way valve that ensures continual evacuation of gases from inside a gasoline internal combustion engine s crankcase.ExplanationAs an engine runs, gases and combustion pressure are… … Wikipedia
Desmodromic valve — In general mechanical terms, the word desmodromic is used to refer to mechanisms that have different controls for their actuation in different directions. Desmodromic poppet valve in Ducati engine. A desmodromic valve is a reciprocating engine… … Wikipedia
