{"id":3235,"count":5,"description":"<!-- wp:paragraph -->\r\n\r\nA sede ou anel da sede da v\u00e1lvula \u00e9 usado para apoiar o obturador ou disco da v\u00e1lvula em uma posi\u00e7\u00e3o totalmente fechada e para formar uma pe\u00e7a de veda\u00e7\u00e3o. Normalmente, o di\u00e2metro da sede da v\u00e1lvula \u00e9 o di\u00e2metro m\u00e1ximo de fluxo da v\u00e1lvula. O material do assento \u00e9 muito amplo, todos os tipos de materiais de borracha, pl\u00e1stico e metal podem ser usados como material do assento, como EPDM, NBR, NR, PTF.E, PEEK, PFA, SS315, STELLITE e assim por diante\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>OBTER PRE\u00c7O DOS AN\u00c9IS DE SEDE DE V\u00c1LVULA<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPara a v\u00e1lvula borboleta, o material da sede geralmente s\u00e3o borrachas, como EPDM, NBR, NR (borracha dura natural)\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPara a v\u00e1lvula esf\u00e9rica e a v\u00e1lvula macho, o material da sede geralmente \u00e9 pl\u00e1stico, como PTFE, PEEK e assim por diante.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPara a v\u00e1lvula globo e a v\u00e1lvula gaveta, o material da sede geralmente \u00e9 metal com metal.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPara v\u00e1lvulas que usam material de sede macio, seu desempenho de fechamento \u00e9 excelente e pode at\u00e9 atingir estanqueidade zero na sede. embora a parte desvantajosa seja que eles n\u00e3o resistem a aplica\u00e7\u00f5es de alta temperatura e alta press\u00e3o.\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\">Tipos de an\u00e9is de assento<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Assento macio (anel de assento n\u00e3o met\u00e1lico)<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA maioria das v\u00e1lvulas possui insertos de sede macios e veda\u00e7\u00f5es de elast\u00f4mero ou pol\u00edmero. O anel de sede n\u00e3o met\u00e1lico \u00e9 feito, por exemplo, de Teflon. O anel \u00e9 preso \u00e0 bola por uma inser\u00e7\u00e3o. Para servi\u00e7os \u00e0 prova de inc\u00eandio, \u00e9 necess\u00e1rio um arranjo secund\u00e1rio de sede metal com metal para omitir vazamentos no caso de perda do material macio da sede durante um inc\u00eandio. V\u00e1lvulas de sede macia s\u00e3o recomendadas somente para servi\u00e7os limpos e s\u00e3o inadequadas para servi\u00e7os sujos\/abrasivos ou altas temperaturas.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Anel de veda\u00e7\u00e3o duplo chanfrado<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nO projeto da estrutura de um anel de veda\u00e7\u00e3o de chanfro duplo foi adotado para reduzir o atrito entre a esfera e o anel de veda\u00e7\u00e3o para obter menor torque operacional. Quando a press\u00e3o m\u00e9dia \u00e9 baixa, a esfera tem uma superf\u00edcie de contato menor com um anel de veda\u00e7\u00e3o, o que introduz maior press\u00e3o de veda\u00e7\u00e3o para garantir a confiabilidade da veda\u00e7\u00e3o. Quando a press\u00e3o m\u00e9dia aumenta, a \u00e1rea de contato entre a esfera e o anel de veda\u00e7\u00e3o aumenta proporcionalmente. Uma \u00e1rea de contato maior reduz a press\u00e3o de veda\u00e7\u00e3o para evitar a deforma\u00e7\u00e3o do anel de veda\u00e7\u00e3o.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>An\u00e9is de assento com l\u00e1bios em balan\u00e7o<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nOs an\u00e9is da sede com l\u00e1bios em balan\u00e7o s\u00e3o projetados de modo que a esfera entre em contato inicialmente apenas com a ponta do l\u00e1bio. \u00c0 medida que as sedes a montante e a jusante s\u00e3o pr\u00e9-tensionadas em um conjunto contra a esfera, os l\u00e1bios desviam e colocam os an\u00e9is da sede em tor\u00e7\u00e3o. Quando a v\u00e1lvula est\u00e1 sendo fechada contra a press\u00e3o da linha, a borda da sede a jusante desvia ainda mais at\u00e9 que finalmente toda a superf\u00edcie da sede se ajusta \u00e0 esfera. Por este projeto, as sedes possuem alguma a\u00e7\u00e3o de mola que promove uma boa a\u00e7\u00e3o de veda\u00e7\u00e3o tamb\u00e9m em baixas press\u00f5es de fluido. Al\u00e9m disso, a constru\u00e7\u00e3o resiliente evita que os assentos sejam esmagados sob altas cargas de fluidos\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Slots de equaliza\u00e7\u00e3o de press\u00e3o<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nO anel de sede mostrado \u00e9 fornecido com ranhuras perif\u00e9ricas, conhecidas como ranhuras de equaliza\u00e7\u00e3o de press\u00e3o. Durante o fechamento da v\u00e1lvula, ocorre o pico de press\u00e3o m\u00e1ximo, durante o qual a sede a jusante pode ser for\u00e7ada a invadir a porta esf\u00e9rica e a v\u00e1lvula pode ficar inoperante. As ranhuras de equaliza\u00e7\u00e3o de press\u00e3o evitam esta falha potencial. Quando a press\u00e3o faz com que a sede a montante se mova contra a esfera e a esfera se mova a jusante, a press\u00e3o simplesmente vaza para dentro da cavidade do corpo da v\u00e1lvula atrav\u00e9s das ranhuras de al\u00edvio. O anel da sede a montante torna-se equilibrado em termos de press\u00e3o. A veda\u00e7\u00e3o a jusante evita danos \u00e0 sede e reduz o torque operacional, proporcionando capacidade bidirecional total. As sedes com ranhuras de equaliza\u00e7\u00e3o de press\u00e3o tamb\u00e9m permitem que a v\u00e1lvula opere com maior diferencial de press\u00e3o com torques mais baixos do que v\u00e1lvulas de veda\u00e7\u00e3o dupla nas quais h\u00e1 veda\u00e7\u00e3o entre ambas as sedes e a esfera.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Assento macio (anel de assento met\u00e1lico)<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nO anel de sede met\u00e1lico, contendo uma inser\u00e7\u00e3o n\u00e3o met\u00e1lica, geralmente requer for\u00e7a de mola para obter uma veda\u00e7\u00e3o herm\u00e9tica. Devido \u00e0s molas, este projeto n\u00e3o \u00e9 utilizado em servi\u00e7os corrosivos. Embora esta sede possua um anel de sede de metal, ela \u00e9 categorizada como uma v\u00e1lvula esfera de sede macia devido ao uso de inserto de material macio, que fica em contato com a esfera.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Assentos de metal com metal<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPara servi\u00e7os inadequados para assentos macios, est\u00e3o sendo utilizados assentos de metal e cer\u00e2mica. Na pr\u00e1tica geral, as v\u00e1lvulas de esfera com sede de metal duro (normalmente estelite) s\u00e3o usadas apenas em condi\u00e7\u00f5es de servi\u00e7o severas, como alta temperatura, alta eros\u00e3o, corros\u00e3o ou abras\u00e3o, lama, etc. As sedes e esferas de metal s\u00e3o normalmente lapidadas em conjuntos correspondentes, resultando em redondeza e adequa\u00e7\u00e3o perfeitas para garantir opera\u00e7\u00e3o suave e fechamento herm\u00e9tico e alcan\u00e7ar &#039;Vazamento Zero&#039;. Assentos de metal v\u00eam em diferentes classes de desligamento, incluindo Classe IV, V e VI. A sede e a esfera de metal s\u00e3o fabricadas com metais b\u00e1sicos revestidos com cromo duro, carboneto de tungst\u00eanio e Stellite.\r\n\r\n<!-- \/wp:paragraph -->","link":"https:\/\/zecovalve.com\/pt\/tag\/valve-seat-rings","name":"An\u00e9is de sede de v\u00e1lvula","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\/pt\/tag\/valve-seat-rings\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\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\/pt\/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\":\"pt-PT\"},{\"@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\":\"pt-PT\",\"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\/pt\/wp-json\/wp\/v2\/tags\/3235","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/posts?tags=3235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}