{"id":2604,"count":9,"description":"\r\n\r\nPour de nombreuses applications n\u00e9cessitant une fermeture \u00e9tanche aux bulles, les vannes papillon \u00e0 double excentration ne sont tout simplement pas \u00e0 la hauteur. Dans ces cas, les vannes papillon \u00e0 triple excentration sont un choix parfait, comme l'explique BM Engineering Supplies dans ce dernier article du didacticiel.\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nOBTENEZ LE PRIX DE LA VALVE PAPILLON TRIPLE OFFSET<\/strong><\/a>\r\n\r\n\r\n\r\n\r\n

Qu'est-ce qu'une vanne papillon triple excentration\u00a0?<\/h2>\r\n\r\n\r\n\r\n\r\nLa vanne papillon a une conception tr\u00e8s compacte appartenant \u00e0 la famille des quarts. Il est l\u00e9ger, facile \u00e0 utiliser et poss\u00e8de un couple inf\u00e9rieur. Il est consid\u00e9r\u00e9 comme le meilleur choix pour les applications critiques et s\u00e9v\u00e8res. La conception de la vanne \u00e0 triple excentration permet d'obtenir une fuite nulle au contact m\u00e9tal sur m\u00e9tal. Le si\u00e8ge \u00e0 rev\u00eatement dur \u00e9limine le frottement entre le si\u00e8ge et la bague d'\u00e9tanch\u00e9it\u00e9 \u00e0 travers le chemin d'\u00e9coulement pour prolonger la dur\u00e9e de vie. Son \u00e9tanch\u00e9it\u00e9 uniforme peut fonctionner plus fr\u00e9quemment et s'ouvrir et se fermer rapidement.\r\n\r\n\r\n\r\n\r\n

Qu'est-ce que la technologie triple offset exactement<\/h2>\r\n\r\n\r\n\r\n\r\nUne vanne papillon \u00e0 triple excentration poss\u00e8de 3 excentrations distinctes. Deux des d\u00e9calages s'appliquent \u00e0 l'emplacement de l'arbre par rapport \u00e0 l'axe central de l'al\u00e9sage et \u00e0 l'axe central des surfaces d'\u00e9tanch\u00e9it\u00e9 disque\/si\u00e8ge. Le troisi\u00e8me d\u00e9calage est la conception dans l'axe de l'angle du c\u00f4ne du si\u00e8ge.\r\n\r\n\r\n\r\n\r\n\r\nD\u00e9calage z\u00e9ro<\/strong>: Le disque tourne autour de l'axe central permettant une rotation potentielle de 360\u00ba. L'\u00e9tanch\u00e9it\u00e9 est obtenue par le disque d\u00e9formant le joint souple, ce qui entra\u00eene une friction totale tout au long du cycle de fonctionnement.\r\n\r\n\r\n\r\n\r\n\r\nDouble d\u00e9calage<\/strong>: Pour permettre le d\u00e9placement du si\u00e8ge, l'arbre est d\u00e9cal\u00e9 par rapport \u00e0 la ligne centrale du si\u00e8ge du disque et du joint de corps (d\u00e9calage un) et \u00e0 la ligne centrale de l'al\u00e9sage (d\u00e9calage deux). Cela cr\u00e9e une action de came pendant le fonctionnement pour soulever le si\u00e8ge hors du joint, ce qui entra\u00eene une friction pendant les 10 premiers degr\u00e9s d'ouverture et les 10 derniers degr\u00e9s de fermeture.\r\n\r\n\r\n\r\n\r\n\r\nTriple d\u00e9calage<\/strong>: Le troisi\u00e8me d\u00e9calage est la conception g\u00e9om\u00e9trique des composants d'\u00e9tanch\u00e9it\u00e9. Les composants d'\u00e9tanch\u00e9it\u00e9 sont chacun usin\u00e9s dans un profil conique d\u00e9cal\u00e9, ce qui donne un c\u00f4ne \u00e0 angle droit. Cela garantit une course sans friction tout au long de son cycle de fonctionnement. Le contact ne s'effectue qu'au point final de fermeture, l'angle de 90\u00b0 faisant office de but\u00e9e m\u00e9canique ; ce qui n'entra\u00eene aucune course excessive du si\u00e8ge du disque.\r\n\r\n\r\n\r\n\r\n
\"\"<\/figure>\r\n\r\n\r\n\r\n

Avantages des vannes papillon \u00e0 triple excentration<\/h2>\r\n\r\n\r\n\r\n\r\nLe triple d\u00e9calage, comme son nom l'indique, utilise trois d\u00e9calages distincts pour obtenir une fermeture \u00e9tanche aux bulles. L'un des d\u00e9calages s'applique \u00e0 l'emplacement de l'arbre de la vanne par rapport \u00e0 l'axe central de l'al\u00e9sage. Un autre d\u00e9calage se situe entre la ligne centrale de la surface d\u2019\u00e9tanch\u00e9it\u00e9 disque\/si\u00e8ge et l\u2019arbre. Ensuite, le troisi\u00e8me d\u00e9calage est la g\u00e9om\u00e9trie de la surface d'assise, qui cr\u00e9e une forme conique du disque et du si\u00e8ge. La combinaison de ces trois d\u00e9ports conf\u00e8re \u00e0 cette vanne ses principaux avantages qui sont les suivants :\r\n\r\n\r\n\r\n\r\n
    \r\n \t
  • Conception g\u00e9om\u00e9trique<\/strong>: La conception des composants d'\u00e9tanch\u00e9it\u00e9 adopte une forme conique \u00e0 angle droit. Il en r\u00e9sulte une conception \u00e0 action par came et \u00e0 angle droit dans laquelle les composants d'\u00e9tanch\u00e9it\u00e9 ne sont jamais en contact jusqu'\u00e0 leur degr\u00e9 final de fermeture. Ainsi, permettant une \u00e9tanch\u00e9it\u00e9 reproductible et une dur\u00e9e de vie prolong\u00e9e de la vanne en raison de sa nature sans frottement. De plus, la course sans friction dans toute la vanne permet d'utiliser un actionneur \u00e0 couple relativement faible pour faire fonctionner ce type de vanne. Une telle conception le rend id\u00e9al pour l\u2019automatisation.<\/li>\r\n \t
  • Joint m\u00e9tal sur m\u00e9tal<\/strong>: En raison du m\u00e9canisme d'\u00e9tanch\u00e9it\u00e9 sans friction, les vannes papillon \u00e0 triple excentrage utilisent un joint m\u00e9tal sur m\u00e9tal. Cela permet une fermeture \u00e9tanche dans les syst\u00e8mes \u00e0 haute pression et haute temp\u00e9rature. Les applications qui utilisent la friction pour l'\u00e9tanch\u00e9it\u00e9 utilisent souvent des \u00e9lastom\u00e8res ou des mat\u00e9riaux souples pour les \u00e9l\u00e9ments internes de la vanne, qui peuvent se d\u00e9t\u00e9riorer avec l'augmentation de la temp\u00e9rature ou lorsque la vanne est soumise \u00e0 la corrosion. Mais gr\u00e2ce au triple d\u00e9calage, les alliages r\u00e9sistants \u00e0 la corrosion peuvent servir \u00e0 la fois pour le disque et le si\u00e8ge de la vanne, afin d'offrir des performances sans fuite.<\/li>\r\n \t
  • Absence de cavit\u00e9s<\/strong>: Dans une vanne triple excentration, il n'y a pas de cavit\u00e9s entre les composants d'\u00e9tanch\u00e9it\u00e9. Par cons\u00e9quent, il n\u2019y a pas de place pour que les d\u00e9bris se bouchent et perturbent le m\u00e9canisme d\u2019\u00e9tanch\u00e9it\u00e9, contrairement aux vannes \u00e0 vanne et \u00e0 bille. Cela minimise les co\u00fbts de maintenance et prolonge la dur\u00e9e de vie de la vanne.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n

    Vanne papillon \u00e0 excentration simple vs vanne papillon \u00e0 triple excentration<\/h2>\r\n\r\n\r\n\r\n\r\nLa vanne papillon \u00e0 excentrage unique n'est pas courante sur le march\u00e9 car elle partage de nombreuses similitudes avec la vanne concentrique\/\u00e0 d\u00e9calage nul. Vous trouverez ci-dessous un tableau mettant en \u00e9vidence les diff\u00e9rences entre les vannes \u00e0 simple et triple excentrage.\r\n\r\n\r\n\r\n\r\n
    \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    Fonctionnalit\u00e9<\/strong><\/td>\r\nVanne \u00e0 excentrage simple\/concentrique<\/strong><\/td>\r\nVanne triple excentration<\/strong><\/td>\r\n<\/tr>\r\n
    Type de joint<\/td>\r\nLe si\u00e8ge de soupape est g\u00e9n\u00e9ralement fabriqu\u00e9 \u00e0 partir de polym\u00e8res ou d'autres mat\u00e9riaux souples pour permettre un joint de friction avec le disque m\u00e9tallique.<\/td>\r\nLes trois d\u00e9calages permettent des joints m\u00e9tal sur m\u00e9tal en utilisant des alliages pour le si\u00e8ge et le disque.<\/td>\r\n<\/tr>\r\n
    Frottement du si\u00e8ge<\/td>\r\n\u00c9lev\u00e9, car la friction est le m\u00e9canisme d\u2019\u00e9tanch\u00e9it\u00e9 de base. Ainsi, il est susceptible de s\u2019user et entra\u00eene une dur\u00e9e de vie du si\u00e8ge plus courte.<\/td>\r\nLe frottement du si\u00e8ge est insignifiant car l'\u00e9tanch\u00e9it\u00e9 se fait par pression de contact. En cons\u00e9quence, le si\u00e8ge de soupape b\u00e9n\u00e9ficie d\u2019une dur\u00e9e de vie op\u00e9rationnelle beaucoup plus longue.<\/td>\r\n<\/tr>\r\n
    Classe de pression ANSI<\/td>\r\nBien que cette vanne puisse assurer une fermeture \u00e9tanche aux bulles, son m\u00e9canisme d'\u00e9tanch\u00e9it\u00e9 inf\u00e9rieur et sa sensibilit\u00e9 \u00e0 l'usure la limitent \u00e0 la classe 150.<\/td>\r\nFournit une \u00e9tanch\u00e9it\u00e9 fiable qui ne s\u2019use pas facilement. Les mod\u00e8les tels que le triple offset peuvent atteindre une valeur nominale de 1\u00a0500 livres.<\/td>\r\n<\/tr>\r\n
    Services fluides<\/td>\r\nEn raison de son m\u00e9canisme d\u2019\u00e9tanch\u00e9it\u00e9 par friction, il n\u2019est efficace qu\u2019avec un fluide propre.<\/td>\r\nLe m\u00e9canisme d'\u00e9tanch\u00e9it\u00e9 \u00e0 triple d\u00e9calage est plus tol\u00e9rant \u00e0 la salet\u00e9 et fonctionne donc avec des fluides propres ou sales.<\/td>\r\n<\/tr>\r\n
    Applications<\/td>\r\nCommun dans les services publics et les applications domestiques.<\/td>\r\nPeut fonctionner efficacement dans des conditions de service s\u00e9v\u00e8res et d'op\u00e9rations cycliques \u00e9lev\u00e9es.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n

    Vanne papillon \u00e0 double excentration vs vanne papillon \u00e0 triple excentration<\/h2>\r\n\r\n\r\n\r\n\r\nLa vanne \u00e0 double d\u00e9port est une am\u00e9lioration de la vanne concentrique\/\u00e0 d\u00e9port simple et offre plus de polyvalence que la vanne \u00e0 d\u00e9port simple. Les comparaisons de fonctionnalit\u00e9s sont not\u00e9es entre le double et le triple ci-dessous\u00a0:\r\n\r\n\r\n\r\n\r\n
    \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    Fonctionnalit\u00e9<\/strong><\/td>\r\nVanne \u00e0 double excentration<\/strong><\/td>\r\nVanne triple excentration<\/strong><\/td>\r\n<\/tr>\r\n
    Type de joint et friction<\/td>\r\nPar rapport au d\u00e9port simple, le d\u00e9port double r\u00e9duit consid\u00e9rablement la friction. Cependant, l\u2019\u00e9tanch\u00e9it\u00e9 repose toujours sur la d\u00e9formation plastique. Par cons\u00e9quent, des mat\u00e9riaux souples sont toujours utilis\u00e9s pour le si\u00e8ge de soupape.<\/td>\r\nMaintient l\u2019\u00e9tanch\u00e9it\u00e9 m\u00e9tal sur m\u00e9tal avec la pression de contact.<\/td>\r\n<\/tr>\r\n
    Service fluide<\/td>\r\nConvient uniquement \u00e0 la manipulation de fluides propres, en raison de la friction dans son m\u00e9canisme d'\u00e9tanch\u00e9it\u00e9.<\/td>\r\nMaintient son efficacit\u00e9, m\u00eame dans les fluides sales.<\/td>\r\n<\/tr>\r\n
    Applications<\/td>\r\nPeut servir dans plusieurs applications industrielles, notamment le traitement de l\u2019eau, les produits chimiques, le p\u00e9trole et le gaz et le CVC.<\/td>\r\nSert \u00e9galement dans les applications industrielles, mais convient aux sc\u00e9narios avec une demande op\u00e9rationnelle plus \u00e9lev\u00e9e.<\/td>\r\n<\/tr>\r\n
    Co\u00fbt<\/td>\r\nSon co\u00fbt est mod\u00e9r\u00e9, c'est-\u00e0-dire plus cher que les vannes \u00e0 simple excentration mais moins que les vannes \u00e0 triple excentration.<\/td>\r\nL'usinage sp\u00e9cialis\u00e9 requis pour obtenir une \u00e9tanch\u00e9it\u00e9 sup\u00e9rieure le rend plus co\u00fbteux.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n","link":"https:\/\/zecovalve.com\/fr\/categorie-de-produits\/butterfly-valve\/triple-offset-butterfly-valve","name":"Vanne papillon \u00e0 triple excentration","slug":"triple-offset-butterfly-valve","taxonomy":"product_cat","parent":2044,"meta":[],"yoast_head":"\nTriple Offset Butterfly Valve - Metal Seated Butterfly Valve | ZECO Valve<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zecovalve.com\/fr\/categorie-de-produits\/butterfly-valve\/triple-offset-butterfly-valve\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Triple Offset Butterfly Valve - Metal Seated Butterfly Valve | ZECO Valve\" \/>\n<meta property=\"og:description\" content=\"For many applications requiring bubble-tight shut-off, double offset butterfly valves simply do not make the grade. In these cases, Triple Offset Butterfly Valves are a perfect choice, as BM Engineering Supplies explains in this latest tutorial article. GET TRIPLE OFFSET BUTTERFLY VALVE PRICE What is a Triple Offset Butterfly Valve? The butterfly valve has a very compact design belonging to the quarter family. It\u2019s lightweight, easy to operate, and has lower torque. It\u2019s considered a top choice for critical and severe applications. The triple offset valve design achieves zero leakage on metal-to-metal contact. The hard facing seat eliminates the rubbing between the seat and seal ring through the flow path to extend the cycle life. Its uniform sealing can operate more frequently, and open and close quickly. What Exactly is Triple Offset Technology A Triple Offset Butterfly Valve has 3 separate offsets. Two of the offsets apply to the location of the shaft with respect to the centerline of the bore and the centerline of the disc\/seat sealing surfaces. The third offset is the design in the axis of the seat cone angle. Zero Offset: The disc rotates around the centre axis allowing for a potential 360\u00ba rotation. Sealing is achieved by the Disc deforming the soft seal resulting in full friction through the full operating cycle. Double Offset: To allow displacement of the seat the shaft is offset from the centre line of the disc seat and body seal (offset one), and the centre line of the bore (offset two). This creates a cam action during operation to lift the seat out of the seal resulting in friction during the first 10 degrees of opening and the final 10 degrees of closing. Triple Offset: The third offset is the geometry design of the sealing components. The sealing components are each machined into an offset conical profile resulting in a right-angled cone. This ensures friction-free stroking throughout its operating cycle. Contact is only made at the final point of closure with the 90\u00b0 angle acting as a mechanical stop; resulting in no over-travel of the disc seat. Benefits of Triple Offset Butterfly Valves Triple offset, as the name implies, uses three separate offsets to achieve a bubble-tight shut-off. One of the offsets applies to the location of the valve shaft relative to the centerline of the bore. Another offset is between the centerline of the disc\/seat sealing surface and the shaft. Then, the third offset is the geometry of the seating surface, which creates a cone shape of the disc and seat. The combination of these three offsets gives this valve its key benefits which are as follows: Geometric Design: The design of the sealing components takes up a right-angle cone shape. Resulting in a cam-action and right-angled design where the sealing components are never in contact until their final degree of closing. Thus, enabling a repeatable sealing and an extended valve life because of its friction-free nature. In addition, the friction-free stroking throughout the valve allows for a relatively lower torque actuator to be used in operating this type of valve. Such a design makes it ideal for automation. Metal-to-Metal Seal: Because of the frictionless sealing mechanism, triple offset butterfly valves use a metal-to-metal seal. This enables a tight shutoff in high-pressure and high-temperature systems. Applications that use friction in sealing often use elastomers or soft material for the valve trim, which may deteriorate with increasing temperature or when the valve is subjected to corrosion. But with the triple offset, corrosion-resistant alloys can serve for both the valve disc and seat, to deliver zero leakage performance. Absence of Cavities: In a triple-offset valve, there are no cavities between sealing components. Therefore, there is no room for debris to clog and disrupt the sealing mechanism, unlike gate and ball valves. This minimizes maintenance costs and extends the valve life. Single Offset Butterfly Valve vs Triple Offset Butterfly Valve The single offset butterfly valve is not common in the market because it shares a lot of similarities with the concentric\/zero offset valve. Below is a table highlighting the differences between the single and triple offset valves. Feature Single Offset\/Concentric Valve Triple Offset Valve Seal type The valve seat is usually made from polymers or other soft materials to enable a friction seal with the metal disc. The three offsets allow for metal-to-metal seals using alloys for both the seat and disc. Seat friction High, because friction is the basic sealing mechanism. Thus, it is susceptible to wear and results in a shorter seat lifespan. Seat friction is insignificant because sealing is by contact pressure. As a result, the valve seat enjoys much longer operational life. ANSI pressure class rating Although this valve can deliver bubble-tight shut-off, its inferior sealing mechanism, and susceptibility to wear limit this to class 150. Delivers dependable sealing which does not wear easily. Models such as the\u00a0triple offset\u00a0can achieve a 1500-pound rating. Fluid services Because of its friction sealing mechanism, it is only effective with clean fluid. The triple offset sealing mechanism is more tolerable to dirt, so works with clean or dirty fluids. Applications Common in utilities and domestic applications. Can function effectively in severe service and high cyclic operations. Double Offset Butterfly Valve vs Triple Offset Butterfly Valve The double offset valve is an improvement of the concentric\/single offset valve and provides more versatility than the single offset. Feature comparisons are noted between the double and triple below: Feature Double Offset Valve Triple Offset Valve Seal type and friction When compared to the single offset, the double offset greatly reduces friction. However, it still relies on plastic deformation for sealing. As a result, soft materials are still used for the valve seat. Maintains metal-to-metal seal with contact pressure. Fluid service Suitable for handling clean fluids only, due to friction in its sealing mechanism. Maintains effectiveness, even in dirty fluids. Applications Can serve in several industrial applications including water treatment, chemicals, oil and gas, and HVAC. Also serves in industrial applications, but suits scenarios with higher operational demand. Cost Comes at a moderate cost i.e. more expensive than single offset valves but less than triple offset valves. The specialized machining required to achieve superior sealing makes it more expensive.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zecovalve.com\/fr\/categorie-de-produits\/butterfly-valve\/triple-offset-butterfly-valve\" \/>\n<meta property=\"og:site_name\" content=\"ZECO Valve\" \/>\n<meta property=\"og:image\" content=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Triple-Offset-Butterfly-Valve.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/zecovalve.com\/#website\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"ZECO Valve\",\"description\":\"Industrial Ball Valve, Gate Valve and Globe Valve Manufacturer\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/zecovalve.com\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"CollectionPage\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/butterfly-valve\/triple-offset-butterfly-valve#webpage\",\"url\":\"https:\/\/zecovalve.com\/product-category\/butterfly-valve\/triple-offset-butterfly-valve\",\"name\":\"Triple Offset Butterfly Valve - Metal Seated Butterfly Valve | ZECO Valve\",\"isPartOf\":{\"@id\":\"https:\/\/zecovalve.com\/#website\"},\"breadcrumb\":{\"@id\":\"https:\/\/zecovalve.com\/product-category\/butterfly-valve\/triple-offset-butterfly-valve#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/zecovalve.com\/product-category\/butterfly-valve\/triple-offset-butterfly-valve\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/butterfly-valve\/triple-offset-butterfly-valve#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"position\":2,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/butterfly-valve\",\"url\":\"https:\/\/zecovalve.com\/product-category\/butterfly-valve\",\"name\":\"Butterfly Valve\"}},{\"@type\":\"ListItem\",\"position\":3,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/butterfly-valve\/triple-offset-butterfly-valve\",\"url\":\"https:\/\/zecovalve.com\/product-category\/butterfly-valve\/triple-offset-butterfly-valve\",\"name\":\"Triple Offset Butterfly Valve\"}}]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","_links":{"self":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/product_cat\/2604","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/product_cat"}],"about":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/taxonomies\/product_cat"}],"up":[{"embeddable":true,"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/product_cat\/2044"}],"wp:post_type":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/product?product_cat=2604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}