In-line control valves

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

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F16K 1/12 (2006.01)

Patent

CA 2235261

In-line control valve constructions are described which include a piston-type valve assembly and a plurality of control chambers (C1, C2, C3, C4) controlled via one or more control ports (CP1, CP2) to provide a normally-open valve which may be closed by controlling the fluid pressure applied to the control port (CP1, CP2), or a normally-closed valve which may be opened by controlling the fluid pressure applied to the control port (CP1, CP2). Also described are valves which have a balanced construction and which therefore include relatively small actuators for opening and closing the valve.

La présente invention concerne un montage de vanne de régulation en ligne comprenant un ensemble vanne à piston et une pluralité de chambres de régulation (C1, C2, C3, C4) commandées par l'intermédiaire d'un ou plusieurs orifices de régulation (CP1, CP2). Ce montage permet la réalisation d'une vanne ouverte au repos et dont la fermeture est commandée par l'application d'une pression de fluide sur un ou plusieurs orifices de régulation (CP1, CP2). Ce montage permet également la réalisation d'une vanne fermée au repos et dont l'ouverture est commandée par l'application d'une pression de fluide sur un ou plusieurs orifices de régulation (CP1, CP2). L'invention concerne également des vannes à montage équilibré, et qui comportent de ce fait des actionneurs d'ouverture et de fermeture intégrés relativement petits.

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