{"id":3235,"count":5,"description":"<!-- wp:paragraph -->\r\n\r\nLe si\u00e8ge de vanne ou l&#039;anneau de si\u00e8ge est utilis\u00e9 pour soutenir le clapet ou le disque de vanne dans une position compl\u00e8tement ferm\u00e9e et pour former une pi\u00e8ce d&#039;\u00e9tanch\u00e9it\u00e9. Habituellement, le diam\u00e8tre du si\u00e8ge de vanne correspond au diam\u00e8tre de d\u00e9bit maximum de la vanne. Le mat\u00e9riau du si\u00e8ge est tr\u00e8s large, toutes sortes de mat\u00e9riaux en caoutchouc, en plastique et en m\u00e9tal peuvent \u00eatre utilis\u00e9s comme mat\u00e9riau de si\u00e8ge, tels que EPDM, NBR, NR, PTF.E, PEEK, PFA, SS315, STELLITE, etc.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_6f889b-ad\"} \/-->\r\n\r\n<!-- wp:generateblocks\/button-container {\"uniqueId\":\"6d8495a3\",\"isDynamic\":true,\"blockVersion\":2} -->\r\n<!-- wp:generateblocks\/button {\"uniqueId\":\"3d442e11\",\"hasUrl\":true,\"target\":true,\"backgroundColor\":\"#0366d6\",\"textColor\":\"#ffffff\",\"backgroundColorHover\":\"#222222\",\"textColorHover\":\"#ffffff\",\"paddingTop\":\"15\",\"paddingRight\":\"20\",\"paddingBottom\":\"15\",\"paddingLeft\":\"20\"} -->\r\n<a class=\"gb-button gb-button-3d442e11 gb-button-text\" href=\"mailto:commercial@zecovalve.com\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>OBTENIR LE PRIX DES BAGUES DE SI\u00c8GE DE SOUPAPE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPour la vanne papillon, le mat\u00e9riau du si\u00e8ge est g\u00e9n\u00e9ralement constitu\u00e9 de caoutchoucs, tels que l&#039;EPDM, le NBR, le NR (caoutchouc dur naturel).\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPour le robinet \u00e0 tournant sph\u00e9rique et le robinet \u00e0 boisseau, le mat\u00e9riau du si\u00e8ge est g\u00e9n\u00e9ralement du plastique, tel que le PTFE, le PEEK, etc.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPour le robinet \u00e0 soupape et le robinet-vanne, le mat\u00e9riau du si\u00e8ge est g\u00e9n\u00e9ralement m\u00e9tal sur m\u00e9tal.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPour les vannes utilisant un mat\u00e9riau de si\u00e8ge souple, leurs performances d&#039;arr\u00eat sont excellentes et peuvent m\u00eame atteindre une \u00e9tanch\u00e9it\u00e9 de si\u00e8ge \u00e0 bulle nulle. tandis que la partie d\u00e9savantag\u00e9e est qu\u2019ils ne peuvent pas r\u00e9sister aux applications \u00e0 haute temp\u00e9rature et haute pression.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nOn the other hand, those valve's seat material is metal to metal therefore they can stand with high-pressure ratings up to 2500LB.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-types-of-seat-rings\">Types d&#039;anneaux de si\u00e8ge<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Si\u00e8ge souple (anneau de si\u00e8ge non m\u00e9tallique)<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nLa majorit\u00e9 des vannes sont dot\u00e9es de si\u00e8ges souples et de joints en \u00e9lastom\u00e8re ou en polym\u00e8re. L&#039;anneau de si\u00e8ge non m\u00e9tallique est par exemple en t\u00e9flon. L&#039;anneau est maintenu contre la balle par un insert. Pour un service sans danger contre l&#039;incendie, un agencement secondaire de si\u00e8ges m\u00e9tal sur m\u00e9tal est n\u00e9cessaire pour \u00e9viter les fuites en cas de perte du mat\u00e9riau souple du si\u00e8ge lors d&#039;un incendie. Les vannes \u00e0 si\u00e8ge souple sont recommand\u00e9es pour un service propre uniquement et ne conviennent pas \u00e0 un service sale\/abrasif ou \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Bague d&#039;\u00e9tanch\u00e9it\u00e9 \u00e0 double biseau<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nLa conception de la structure d&#039;une bague d&#039;\u00e9tanch\u00e9it\u00e9 \u00e0 double biseau a \u00e9t\u00e9 adopt\u00e9e pour r\u00e9duire le frottement entre la bille et la bague d&#039;\u00e9tanch\u00e9it\u00e9 afin d&#039;obtenir un couple de fonctionnement inf\u00e9rieur. Lorsque la pression moyenne est faible, la bille a une surface de contact plus petite avec une bague d&#039;\u00e9tanch\u00e9it\u00e9, ce qui introduit une pression d&#039;\u00e9tanch\u00e9it\u00e9 plus \u00e9lev\u00e9e pour garantir la fiabilit\u00e9 de l&#039;\u00e9tanch\u00e9it\u00e9. Lorsque la pression moyenne augmente, la zone de contact entre la bille et la bague d&#039;\u00e9tanch\u00e9it\u00e9 augmente en cons\u00e9quence. Une zone de contact plus grande r\u00e9duit la pression d&#039;\u00e9tanch\u00e9it\u00e9 pour \u00e9viter la d\u00e9formation de la bague d&#039;\u00e9tanch\u00e9it\u00e9.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Anneaux de si\u00e8ge \u00e0 l\u00e8vres en porte-\u00e0-faux<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nLes anneaux de si\u00e8ge avec l\u00e8vres en porte-\u00e0-faux sont con\u00e7us de telle sorte que la bille entre initialement en contact uniquement avec la pointe de la l\u00e8vre. Les si\u00e8ges amont et aval \u00e9tant pr\u00e9contraints sur un assemblage contre la bille, les l\u00e8vres se d\u00e9\ufb02\u00e8tent et mettent les anneaux du si\u00e8ge en torsion. Lorsque la vanne est ferm\u00e9e contre la pression de la conduite, la l\u00e8vre du si\u00e8ge aval se d\u00e9forme encore davantage jusqu&#039;\u00e0 ce que finalement toute la surface du si\u00e8ge corresponde \u00e0 la bille. Gr\u00e2ce \u00e0 cette conception, les si\u00e8ges ont une certaine action \u00e9lastique qui favorise une bonne \u00e9tanch\u00e9it\u00e9 m\u00eame \u00e0 faible pression de fluide. De plus, la construction r\u00e9siliente emp\u00eache les si\u00e8ges d&#039;\u00eatre \u00e9cras\u00e9s sous des charges de fluide \u00e9lev\u00e9es.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Fentes d&#039;\u00e9quilibrage de pression<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nL&#039;anneau de si\u00e8ge repr\u00e9sent\u00e9 est pourvu de fentes p\u00e9riph\u00e9riques, appel\u00e9es fentes d&#039;\u00e9quilibrage de pression. Lors de la fermeture de la vanne, la surpression maximale se produit, pendant laquelle le si\u00e8ge aval peut \u00eatre forc\u00e9 \u00e0 p\u00e9n\u00e9trer dans l&#039;orifice \u00e0 bille et la vanne peut devenir inop\u00e9rante. Les fentes d&#039;\u00e9quilibrage de pression emp\u00eachent cette d\u00e9faillance potentielle. Lorsque la pression am\u00e8ne le si\u00e8ge en amont \u00e0 se d\u00e9placer contre la bille et que la bille se d\u00e9place vers l&#039;aval, la pression s&#039;\u00e9chappe simplement dans la cavit\u00e9 du corps de la vanne par les fentes de d\u00e9charge. La bague de si\u00e8ge en amont devient \u00e9quilibr\u00e9e en pression. L&#039;\u00e9tanch\u00e9it\u00e9 en aval \u00e9vite d&#039;endommager le si\u00e8ge et r\u00e9duit le couple de fonctionnement tout en offrant une capacit\u00e9 bidirectionnelle compl\u00e8te. Les si\u00e8ges dot\u00e9s de fentes d&#039;\u00e9quilibrage de pression permettent \u00e9galement \u00e0 la vanne de fonctionner \u00e0 une pression diff\u00e9rentielle plus \u00e9lev\u00e9e avec des couples inf\u00e9rieurs \u00e0 ceux des vannes \u00e0 double \u00e9tanch\u00e9it\u00e9 dans lesquelles il y a une \u00e9tanch\u00e9it\u00e9 entre les deux si\u00e8ges et la bille.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Si\u00e8ge souple (anneau de si\u00e8ge m\u00e9tallique)<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nL&#039;anneau de si\u00e8ge m\u00e9tallique, contenant un insert non m\u00e9tallique, n\u00e9cessite g\u00e9n\u00e9ralement la force d&#039;un ressort pour obtenir une \u00e9tanch\u00e9it\u00e9 parfaite. Gr\u00e2ce aux ressorts, cette conception n&#039;est pas utilis\u00e9e en service corrosif. M\u00eame si ce si\u00e8ge est dot\u00e9 d&#039;un anneau de si\u00e8ge en m\u00e9tal, il est class\u00e9 comme un robinet \u00e0 tournant sph\u00e9rique \u00e0 si\u00e8ge souple en raison de son utilisation d&#039;un insert en mat\u00e9riau souple, qui est en contact avec la bille.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Si\u00e8ges m\u00e9tal sur m\u00e9tal<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPour les services qui ne conviennent pas aux si\u00e8ges souples, des si\u00e8ges en m\u00e9tal et en c\u00e9ramique sont utilis\u00e9s. En pratique g\u00e9n\u00e9rale, les robinets \u00e0 boisseau sph\u00e9rique \u00e0 si\u00e8ge en m\u00e9tal dur (g\u00e9n\u00e9ralement en stellite) ne sont utilis\u00e9s que dans des conditions de service s\u00e9v\u00e8res telles que haute temp\u00e9rature, forte \u00e9rosion, corrosion ou abrasion, boue, etc. Les si\u00e8ges m\u00e9talliques ne sont g\u00e9n\u00e9ralement pas \u00e9tanches aux bulles. Les si\u00e8ges et les billes m\u00e9talliques sont g\u00e9n\u00e9ralement rod\u00e9s dans des ensembles assortis, ce qui donne une rondeur et une forme physique parfaites pour garantir un fonctionnement fluide et une fermeture \u00e9tanche et atteindre \u00ab\u00a0z\u00e9ro fuite\u00a0\u00bb. Les si\u00e8ges m\u00e9talliques sont disponibles dans diff\u00e9rentes classes d&#039;arr\u00eat, notamment les classes IV, V et VI. Le si\u00e8ge et la boule en m\u00e9tal sont fabriqu\u00e9s \u00e0 partir de m\u00e9taux de base recouverts de chrome dur, de carbure de tungst\u00e8ne et de Stellite.\r\n\r\n<!-- \/wp:paragraph -->","link":"https:\/\/zecovalve.com\/fr\/tag\/valve-seat-rings","name":"Anneaux de si\u00e8ge de soupape","slug":"valve-seat-rings","taxonomy":"post_tag","meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Valve Seat Rings - Seat Ring Valve - Butterfly Valve Seat Ring | ZECO<\/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\/tag\/valve-seat-rings\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Valve Seat Rings - Seat Ring Valve - Butterfly Valve Seat Ring | ZECO\" \/>\n<meta property=\"og:description\" content=\"The Valve seat or seat ring is used to support the valve plug or disc in a fully closed position and to form a sealing part. Usually, the valve seat diameter is the maximum flow diameter of the valve. The seat material is very wide, all kinds of rubber, plastic, and metal materials can be used as seat material, such as EPDM, NBR, NR, PTF.E, PEEK, PFA, SS315, STELLITE, and so on   GET VALVE SEAT RINGS PRICE  For the butterfly valve, the seat material usually are rubbers, such as EPDM, NBR, NR (Natural hard rubber)  For the ball valve and plug valve the seat material usually is plastics, such as PTFE, PEEK, and so on.  For the globe valve and gate valve the seat material usually is metal to metal.  For valves using soft seat material, their shut-off performance is great and even can reach zero bubble seat tightness. while the disadvantaged part is they can not resist high temperature and high-pressure applications.  On the other hand, those valve&#8217;s seat material is metal to metal therefore they can stand with high-pressure ratings up to 2500LB.  Types of Seat Rings  Soft Seat (Nonmetallic Seat Ring)  The majority of valves have soft seat inserts and elastomer or polymer seals. The nonmetallic seat ring is made from e.g. Teflon. The ring is held against the ball by an insert. For fire-safe service, a secondary metal-to-metal seating arrangement is required to omit leakage in the event that the soft seat material is lost during a fire. Soft seated valves are recommended for clean service only and are unsuitable for dirty\/abrasive service or high temperatures.  Double Beveled Sealing Ring  The structure design of a double-beveled sealing ring has been adopted to reduce the friction between the ball and the sealing ring to achieve lower operating torque. When the medium pressure is low, the ball has a smaller contacting surface with a sealing ring, which introduces higher sealing pressure to ensure the sealing reliability. When the medium pressure gets higher, the contacting area between the ball and the sealing ring increases accordingly. A larger contact area reduces the sealing pressure to avoid the deformation of the sealing ring.  Cantilevered lips seat rings  Seat rings with cantilevered lips are designed so that the ball contacts initially only the tip of the lip. As the upstream and downstream seats are pre-stressed on an assembly against the ball, the lips de\ufb02ect and put the seat rings into a torsion. When the valve is being closed against the line pressure, the lip of the downstream seat de\ufb02ects still further until \ufb01nally the entire seat surface matches the ball. By this design, the seats have some spring action that promotes good sealing action also at low \ufb02uid pressures. Furthermore, the resilient construction keeps the seats from being crushed at high \ufb02uid loads  Pressure equalizing slots  The seat ring shown is provided with peripheral slots, which are known as pressure-equalizing slots. During the closing of the valve, the maximum surge pressure occurs, during which the downstream seat can be forced to intrude into the ball port and the valve can become inoperative. The pressure equalizing slots prevents this potential failure. When pressure causes the upstream seat to move against the ball and the ball moves downstream, the pressure simply leaks into the valve body cavity through the relief slots. The upstream seat ring becomes pressure balanced. Downstream sealing prevents seat damage and lowers operating torque while providing full bidirectional capability. The seats with pressure equalizing slots also permit the valve to operate at a higher pressure differential with lower torques than double sealing valves in which there is sealing between both seats and the ball.  Soft Seat (Metallic Seat Ring)  The metallic seat ring, containing a nonmetallic insert, usually requires spring force to achieve a tight seal. Due to springs, this design is not used in corrosive service. Even though this seat has a metal seat ring, it is categorized as a soft seated ball valve due to its use of soft material insert, which is in contact with the ball.  Metal to Metal Seats  For services unsuitable for soft seating, metal and ceramic seating are being used. In general practice, hard metal seated ball valves (typically stellite) are only used in severe service conditions such as high temperature, high erosion, corrosion or abrasion, slurry, etc. Metal seats are generally not bubble tight. Metal seats and balls are typically lapped in matching sets resulting in perfect roundness and fitness to ensure smooth operation and tight shut-off and achieving \u2018Zero Leakage\u2019. Metal seats come in different classes of Shut Off including Class IV, V, and VI. Metal Seat and Ball are fabricated from base metals coated with hard chrome, tungsten carbide, and Stellite.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zecovalve.com\/fr\/tag\/valve-seat-rings\" \/>\n<meta property=\"og:site_name\" content=\"ZECO Valve\" \/>\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\/tag\/valve-seat-rings#webpage\",\"url\":\"https:\/\/zecovalve.com\/tag\/valve-seat-rings\",\"name\":\"Valve Seat Rings - Seat Ring Valve - Butterfly Valve Seat Ring | ZECO\",\"isPartOf\":{\"@id\":\"https:\/\/zecovalve.com\/#website\"},\"breadcrumb\":{\"@id\":\"https:\/\/zecovalve.com\/tag\/valve-seat-rings#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/zecovalve.com\/tag\/valve-seat-rings\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/zecovalve.com\/tag\/valve-seat-rings#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\/tag\/valve-seat-rings\",\"url\":\"https:\/\/zecovalve.com\/tag\/valve-seat-rings\",\"name\":\"Valve Seat Rings\"}}]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","_links":{"self":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/tags\/3235","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/posts?tags=3235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}