Diaphragm-sealed valve, analytical chromatographic system...

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

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F16K 7/16 (2006.01) F16K 11/22 (2006.01) G01N 30/20 (2006.01) G01N 30/24 (2006.01)

Patent

CA 2631892

There is provided a diaphragm sealed valve particularly advantageous in chromatographic systems. The valve is provided with first and second body and a seal member compressibly positioned therebetween. The first body comprises a first, a second and a common port, each opening and being interconnected to the others in a recessed fluid communication channel extending in a first interface of the first body. The valve is also provided with first and second plungers, each having a closed position wherein the plunger presses down the seal member against the seat of the corresponding port for closing said corresponding port, and an open position wherein the plunger extends away from the seat for allowing a fluid communication between the corresponding port and the channel. Complex valves are also provided as well as chromatographic systems and methods.

Robinet à membrane particulièrement avantageux dans les systèmes chromatographiques. Le robinet est pourvu d'un premier et d'un deuxième corps et d'un élément d'étanchéité positionné de manière compressible entre ceux-ci. Le premier corps comporte un premier et un deuxième orifices ainsi qu'un orifice commun, chacun d'eux s'ouvrant et communiquant avec les autres dans un canal évidé de communication du fluide s'étendant au niveau d'une première interface du premier corps. Le robinet est également pourvu d'un premier et d'un deuxième plongeurs, chacun d'eux ayant une position fermée où le plongeur presse l'élément d'étanchéité vers le bas contre le siège de l'orifice correspondant en vue de fermer ce dernier et une position ouverte où le plongeur s'étend à l'écart du siège en vue de permettre une communication du fluide entre l'orifice correspondant et le canal. Des robinets complexes sont également décrits, ainsi que des systèmes et des procédés chromatographiques.

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