Rotary valve and analytical chromatographic system using the...

F - Mech Eng,Light,Heat,Weapons – 16 – K

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F16K 11/074 (2006.01)

Patent

CA 2577824

There is provided a rotary valve for fluid analytical systems. The present valve provides improved characteristics such as an extended lifetime. The valve can fulfil different fluid analytical functions and can be a multi-ports and/or multi-positions valve. The valve is provided with extra recesses in the rotor and extra ports in the stator. These recesses allow to cancel the effect of any possible leaks by evacuating them. Such a valve then prevents cross- port leaks and can advantageously be used in highly critical applications. Moreover, the present valve can be used in an analytical system which is advantageously self-diagnostic.

L'invention concerne une soupape rotative pour des systèmes d'analyse de fluide. Cette soupape rotative présente de meilleures caractéristiques, par ex. une durée de service prolongée. La soupape selon l'invention peut remplir différents fonctions d'analyse de fluide, et peut se présenter sous la forme d'une soupape multivoie et/ou d'une soupape multiposition. La soupape comprend des évidements supplémentaires dans le rotor, ainsi que des orifices supplémentaires dans le stator. Lesdits évidements permettent d'annuler les effets de fuites éventuelles, par évacuation. Cette soupape empêche les fuites par les orifices, et peut être utilisée avantageusement dans des applications très critiques. En outre, la présente soupape peut être employée dans un système d'analyses présentant l'avantage d'exercer l'autodiagnostic.

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