Shut-off fitting

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

Patent

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Details

F16K 3/28 (2006.01)

Patent

CA 2490366

The invention relates to a shut-off fitting (1) for a flowing medium, particularly a slide fitting (2) that is designed for being subjected to the action of pressure on both sides. The inventive shut-off fitting comprises: a fitting housing (3), which forms a flow channel (6) and a slide chamber (11); a blocking element (23), which can block the flow channel (6) and which is provided with an elastomeric lining, and; a slide spindle (16), which passes through a sealing and/or mounting arrangement (14, 15) inside a housing neck extension (12) that delimits the slide chamber (11), and which is rotationally connected with threaded engagement to a spindle nut (19) coupled to the blocking element (23). The blocking element (23) consists of a number of parts, and at least one external dimension (29) of the base body (28) is slightly less than a nominal width (9) of the flow channel (6). Sealing elements (34) that, with an encircling edge bead (35), extend beyond the external dimension (29) are arranged on opposing supporting faces (32) of the base body (28) via a positive connection.

L'invention concerne un robinet d'arrêt (1) pour un flux, notamment une vanne d'arrêt (2) conçue pour une mise sous pression des deux côtés, ce dispositif comprenant les éléments suivants : un corps de robinetterie (3) formant un canal d'écoulement (6) et une cage de vanne (11), un élément d'arrêt (23) constituant une garniture souple d'étanchéité et pouvant retenir le flux du canal d'écoulement (6), une broche d'arrêt (16) qui traverse un dispositif (14, 15) d'étanchéité et/ou de logement dans un prolongement du col du corps (12) délimitant la cage de vanne (11), laquelle broche est reliée par rotation au moyen d'un filetage avec un écrou (19) couplé à l'élément d'arrêt (23). L'invention est caractérisée en ce que l'élément d'arrêt (23) est constitué de plusieurs éléments et au moins une cote externe (29) de l'élément de base (28) est légèrement inférieure à une section nominale (9) du canal d'écoulement (6). Selon l'invention, des éléments d'étanchéité (34) dépassant la cote externe (29) par un bourrelet périphérique (35) sont disposés sur les surfaces d'appui (32) opposées de l'élément de base (28) communiquant par liaison de forme.

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