relief device

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• 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

• relief valve — [1] A valve in the air pump of an air injection system which dumps part of the air at high pump speeds to prevent pump damage. It may be combined with the air gulp valve. [2] Safety device on a sealed system. It opens to release fluids before… …   Dictionary of automotive terms

• relief 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, ↑escape valve, ↑escape cock, ↑escape • Hypernyms: ↑valve, ↑regulator * * * …   Useful english dictionary

• relief valve — a device that, when actuated by static pressure above a predetermined level, opens in proportion to the excess above this level and reduces the pressure to it. Cf. safety valve (def. 1). * * * …   Universalium

• Reduced pressure zone device — A Reduced Pressure Zone Device (RPZD, RPZ or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. An RPZD is considered suitable for high hazard applications, that is, where the consequence of… …   Wikipedia

• Mueller device — Picture of the Mueller Device as seen in Alias 1x01. A Mueller device is a mysterious piece of technology in the US television series Alias. It usually appears as a hook shaped armature which levitates a red orange liquid filled sphere. It is… …   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

• Seal (device) — A seal can mean a wax seal bearing an impressed figure, or an embossed figure in paper, with the purpose of authenticating a document, but the term can also mean any device for making such impressions or embossments, essentially being a mould… …   Wikipedia

• Operational Distinguishing Device — Coast Guard Unit Commendation with award star and Operational Distinguishing Device The Operational Distinguishing Device is a decoration of the United States Coast Guard which may be awarded as an attachment to certain personal and unit awards.… …   Wikipedia

• pneumatic device — Any of various tools and instruments that generate and use compressed air. Examples include rock drills, pavement breakers, riveters, forging presses, paint sprayers, blast cleaners, and atomizers. Compressed air power is flexible, economical,… …   Universalium

• safety relief valve — A spring loaded valve designed to open and relieve excessive pressure in a device when it exceeds a predetermined safe point …   Dictionary of automotive terms