{"id":45798,"date":"2024-11-12T16:22:48","date_gmt":"2024-11-12T16:22:48","guid":{"rendered":"https:\/\/www.fhtvalves.com\/vannes-a-boisseau-spherique-a-double-blocage-et-purge\/"},"modified":"2025-12-04T13:18:03","modified_gmt":"2025-12-04T13:18:03","slug":"vannes-a-boisseau-spherique-a-double-blocage-et-purge","status":"publish","type":"page","link":"https:\/\/www.fhtvalves.com\/fr\/vannes-a-boisseau-spherique-a-double-blocage-et-purge\/","title":{"rendered":"Vannes \u00e0 boisseau sph\u00e9rique \u00e0 double blocage et purge"},"content":{"rendered":"

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Vannes \u00e0 boisseau sph\u00e9rique \u00e0 double blocage et purge (DBB)<\/h1>\n

Vannes \u00e0 sph\u00e8re DBB<\/h2>\n

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Une vanne \u00e0 boisseau sph\u00e9rique DBB (double blocage et purge) est un type de vanne con\u00e7u pour assurer une \u00e9tanch\u00e9it\u00e9 efficace dans les syst\u00e8mes de tuyauterie, garantissant l’isolation des deux c\u00f4t\u00e9s de la vanne, avec la capacit\u00e9 suppl\u00e9mentaire de purger la pression entre les deux sections isol\u00e9es. Cette vanne est couramment utilis\u00e9e dans des industries telles que le p\u00e9trole et le gaz, la p\u00e9trochimie et d’autres applications o\u00f9 la s\u00e9curit\u00e9, l’isolation et la maintenance sont essentielles. <\/span><\/p>\n

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Double blocage (DB):<\/b><\/p>\n

Une vanne \u00e0 boule DBB comporte deux surfaces d’appui (blocs) qui peuvent isoler la pression en amont et en aval de la vanne. Ces deux blocs emp\u00eachent le passage de tout fluide ou gaz lorsque la vanne est ferm\u00e9e. <\/span><\/p>\n

Les deux blocs sont g\u00e9n\u00e9ralement cr\u00e9\u00e9s \u00e0 l’aide de deux vannes \u00e0 bille s\u00e9par\u00e9es dans un seul corps ou de deux m\u00e9canismes d’\u00e9tanch\u00e9it\u00e9 dans une seule vanne.<\/span><\/p>\n

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Purga (B):<\/b><\/p>\n

Un m\u00e9canisme de purge (g\u00e9n\u00e9ralement une petite soupape) est situ\u00e9 entre les deux blocs. Il permet de lib\u00e9rer (ou de purger) la pression emprisonn\u00e9e entre les deux surfaces d’\u00e9tanch\u00e9it\u00e9. Cette caract\u00e9ristique permet de confirmer que la vanne isole correctement le flux et peut \u00e9galement \u00eatre utilis\u00e9e pour d\u00e9pressuriser ou vidanger le syst\u00e8me en toute s\u00e9curit\u00e9 \u00e0 des fins de maintenance. <\/span><\/p>\n

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GAMME DE FABRICATION<\/h4>\n

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Vanne DBB \u00e0 corps unique<\/b><\/h3>\n

Dans cette conception, les fonctions de verrouillage et de purge sont log\u00e9es dans un seul corps de vanne, avec deux surfaces d’\u00e9tanch\u00e9it\u00e9 ind\u00e9pendantes et un orifice de purge.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Vanne DBB \u00e0 double corps<\/b><\/h3>\n

Il se compose de deux vannes s\u00e9par\u00e9es dispos\u00e9es en s\u00e9rie, avec une vanne de purge entre les deux.<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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