Safety valve — A safety valve is a valve mechanism for the automatic release of a gas from a boiler, pressure vessel, or other system when the pressure or temperature exceeds preset limits. It is part of a bigger set named pressure safety valves (PSV) or… … 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
Safety engineering — is an applied science strongly related to systems engineering and the subset System Safety Engineering. Safety engineering assures that a life critical system behaves as needed even when pieces fail.In the real world the term safety engineering… … Wikipedia
Safety instrumented system — A Safety Instrumented System (SIS) is a form of process control usually implemented in industrial processes, such as those of a factory or an oil refinery. The SIS performs specified functions to achieve or maintain a safe state of the process… … Wikipedia
valve — valveless, adj. valvelike, adj. /valv/, n., v., valved, valving. n. 1. any device for halting or controlling the flow of a liquid, gas, or other material through a passage, pipe, inlet, outlet, etc. 2. a hinged lid or other movable part that… … Universalium
Valve audio amplifier - technical — Circuitry and performance Characteristics of valves Valves are very high input impedance (near infinite in most circuits) and high output impedance devices. They are also high voltage / low current devices.While valves themselves are described… … Wikipedia
Pressure relief valve — A pressure relief valve is a safety device that relieve in case of overpressure in vessel or piping. The generic term is or pressure relief Valve (PRV) or pressure safety valve (PSV).Main types of pressure relief valves include: *Relief valve… … Wikipedia
Relief valve — The relief valve is a type of valve used to control or limit the pressure in a system or vessel which can build up by a process upset, instrument or equipment failure, or fire. The pressure is relieved by allowing the pressurised fluid to flow… … Wikipedia
Artificial heart valve — An artificial heart valve is a device implanted in the heart of a patient with heart valvular disease. When one of the four heart valves malfunctions, the medical choice may be to replace the natural valve with an artificial valve. This requires… … Wikipedia
Pilot-operated relief valve — A Pilot Operated Relief Valve is used to relieve large flows with small pressure differential. [cite web|title=Pressure control valves part 1|url=http://www.hydraulicspneumatics.com/200/FPE/Valves/Article/True/6411/Valves 070111… … Wikipedia
escape valve — 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 • Syn: ↑safety valve, ↑relief valve, ↑escape cock, ↑escape • Hypernyms: ↑valve, ↑regulator * * * … Useful english dictionary
