{"id":2469,"count":2,"description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_9aa51d-a6\"} \/-->\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>OBTENER PRECIO DEL MATERIAL DE LA V\u00c1LVULA DE MARIPOSA<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-butterfly-valve-material\">Material de la v\u00e1lvula de mariposa<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nHay varios tipos de materiales disponibles para v\u00e1lvulas de mariposa que se adaptan a los requisitos de diferentes aplicaciones, como A216 WCB, A216 WCC, A217 WC6, A217 WC9, etc. De acuerdo con nuestra rica experiencia y las necesidades de la industria, seleccionamos el material adecuado para producir v\u00e1lvulas de mariposa. Actualmente, suministramos principalmente v\u00e1lvulas de mariposa de acero inoxidable y v\u00e1lvulas de mariposa criog\u00e9nicas. Puede hacer clic en el producto para obtener m\u00e1s detalles.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-butterfly-valves-for-sale-list-by-material\">Lista de v\u00e1lvulas de mariposa a la venta por material<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:columns -->\r\n<div class=\"wp-block-columns\">\r\n\r\n<!-- wp:column -->\r\n<div class=\"wp-block-column\">\r\n\r\n<!-- wp:image {\"id\":16168,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\r\n<figure class=\"wp-block-image size-full\"><img class=\"wp-image-16168\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/stainless-steel-butterfly-valve.jpg\" alt=\"V\u00e1lvula de mariposa de acero inoxidable\" \/><figcaption><a href=\"https:\/\/zecovalve.com\/es\/products\/stainless-steel-butterfly-valve.html\/\">V\u00e1lvula de mariposa de acero inoxidable<em>\/ OBTENER EL PRECIO DE LA V\u00c1LVULA &gt;<\/em><\/a><\/figcaption><\/figure>\r\n<!-- \/wp:image -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<a href=\"https:\/\/zecovalve.com\/es\/products\/stainless-steel-butterfly-valve.html\/\">V\u00e1lvula de mariposa de acero inoxidable La v\u00e1lvula de mariposa de acero inoxidable ZECO es un tipo de v\u00e1lvula de mariposa con alto rendimiento y larga vida \u00fatil. Se compone principalmente de dispositivos de accionamiento y piezas de acero inoxidable.\/ CONSULTAR PRECIO DE V\u00c1LVULA &gt;<\/a>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<!-- wp:column -->\r\n<div class=\"wp-block-column\">\r\n\r\n<!-- wp:image {\"id\":16242,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\r\n<figure class=\"wp-block-image size-full\"><img class=\"wp-image-16242\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/cryogenic-butterfly-valve.jpg\" alt=\"V\u00e1lvula de mariposa criog\u00e9nica\" \/><figcaption><a href=\"https:\/\/zecovalve.com\/es\/products\/cryogenic-butterfly-valve.html\/\">V\u00e1lvula de mariposa criog\u00e9nica<em>\/ OBTENER EL PRECIO DE LA V\u00c1LVULA &gt;<\/em><\/a><\/figcaption><\/figure>\r\n<!-- \/wp:image -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<a href=\"https:\/\/zecovalve.com\/es\/products\/cryogenic-butterfly-valve.html\/\">V\u00e1lvula de mariposa criog\u00e9nica El volumen del cuerpo de la v\u00e1lvula de mariposa criog\u00e9nica ZECO es peque\u00f1o y de forma sim\u00e9trica, y el espesor de la pared es uniforme.\/ OBTENER PRECIO DE V\u00c1LVULA &gt;<\/a>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<\/div>\r\n<!-- \/wp:columns -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-introduction-of-butterfly-valve-material\">Introducci\u00f3n del material de la v\u00e1lvula de mariposa<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA216 WCB y A216 WCC son materiales com\u00fanmente utilizados para los cuerpos y el disco de las v\u00e1lvulas de mariposa, son adecuados para agua, petr\u00f3leo, gas, vapor y otros medios no corrosivos; algunas veces tambi\u00e9n se pueden usar para servicios amargos despu\u00e9s de desechar NACE. MR-01-75 o NACE MR-01-03 y considere el margen de corrosi\u00f3n. Debe tenerse en cuenta que no son adecuados para bajas temperaturas inferiores a -29 \u2103 y altas temperaturas superiores a 425 \u2103.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<strong>Cuerpo de v\u00e1lvula WCC<\/strong>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEl grado WCC est\u00e1 cubierto por la norma ASTM A216, cuya especificaci\u00f3n cubre piezas fundidas de acero al carbono para v\u00e1lvulas, accesorios, bridas y otras piezas que contienen presi\u00f3n para servicio a alta temperatura y la calidad requerida para el ensamblaje con otras piezas fundidas o piezas de acero forjado mediante soldadura por fusi\u00f3n.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA217 WC6 y A217 WC9 se usan generalmente para aplicaciones de alta temperatura; generalmente, el medio es vapor de alta temperatura o aire caliente; para tales aplicaciones, la v\u00e1lvula tiene asiento de metal a metal o anillo de asiento SS+grafito. Para lograr un cierre herm\u00e9tico, estas v\u00e1lvulas suelen tener un dise\u00f1o de triple exc\u00e9ntrica.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<strong>Cuerpo de v\u00e1lvula WC6<\/strong>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nASTM A217 Gr. Las v\u00e1lvulas WC6 est\u00e1n hechas de material WC6. La especificaci\u00f3n ASTM A217 incluye un grupo de aceros de baja aleaci\u00f3n de aceros al molibdeno y al cromo molibdeno. El material WC6 es acero de 1 \u00bc de cromo y \u00bd molibdeno.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA352 LCB y A352 LCC generalmente se usan para aplicaciones de baja temperatura; generalmente, el medio es de baja temperatura pero superior a -46 \u2103 o la v\u00e1lvula est\u00e1 instalada al aire libre en un \u00e1rea de un ambiente fr\u00edo. Pero estos materiales no se pueden utilizar para altas temperaturas superiores a 345 \u2103.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA351 CF8, A351 CF8M, A351 CF3 y A351 CF3M, estos aceros inoxidables austen\u00edticos que son antioxidantes y anticorrosivos, adecuados para el medio de varios tipos de \u00e1cidos. Tambi\u00e9n funcionan muy bien para aplicaciones de baja y alta temperatura, pero su costo es mucho m\u00e1s alto que el del acero al carbono.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEl bronce de aluminio como B148 C95500 y B148 C95800 son perfectamente adecuados para aplicaciones en agua de mar. La v\u00e1lvula de mariposa Al-Bronze se usa ampliamente en aplicaciones costa afuera y tuber\u00edas de agua de mar. Debido a que su costo es alto, una v\u00e1lvula de mariposa de gran tama\u00f1o generalmente se usa como material de disco para el dise\u00f1o de l\u00ednea central.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEl acero d\u00faplex A890 4A, A890 5A, SAF2205, S31803 y el acero s\u00faper d\u00faplex A890 6A, SAF2507 y S32750 tienen un rango de aplicaci\u00f3n similar al Al-Bronze, tienen buena resistencia a la corrosi\u00f3n por cloruro, por lo que se usan ampliamente para aplicaciones de agua de mar y agua producida. solicitud.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>\u00bfQu\u00e9 es un asiento en una v\u00e1lvula?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nB\u00e1sicamente, un asiento de v\u00e1lvula es donde descansa el componente m\u00f3vil de una v\u00e1lvula cuando est\u00e1 en la posici\u00f3n cerrada. En aplicaciones de v\u00e1lvulas de mariposa, el disco descansa de forma segura sobre el asiento para cerrar y sellar la v\u00e1lvula. Los asientos est\u00e1n dise\u00f1ados para mantener el sello intacto a pesar de las tensiones t\u00e9rmicas, de fricci\u00f3n y de impacto de un proceso.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Introducci\u00f3n del material del asiento de la v\u00e1lvula de mariposa<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEl asiento de la v\u00e1lvula es una pieza desmontable dentro de la v\u00e1lvula. Su funci\u00f3n principal es soportar que el n\u00facleo de la v\u00e1lvula est\u00e9 completamente cerrado o completamente cerrado y formar un par de sellado. En circunstancias normales, el di\u00e1metro del asiento de la v\u00e1lvula es el tama\u00f1o de la v\u00e1lvula. El asiento de la v\u00e1lvula de mariposa est\u00e1 hecho de una amplia gama de materiales, pero los materiales com\u00fanmente utilizados incluyen EPDM de sello blando, caucho de nitrilo (NBR), politetrafluoroetileno (PTFE) y materiales de aleaciones duras de sello met\u00e1lico. amable. Present\u00e9moslos uno por uno a continuaci\u00f3n.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:list {\"ordered\":true} -->\r\n<ol>\r\n \t<li>EPDM: Comparado con otros cauchos de uso general, el EPDM tiene grandes ventajas.\r\n<ul>\r\n \t<li>El rendimiento de costos es muy alto. Entre los cauchos com\u00fanmente utilizados, el EPDM tiene la densidad de caucho bruto m\u00e1s ligera y se puede rellenar en grandes cantidades, lo que reduce el costo del caucho.<\/li>\r\n \t<li>El material EPDM es resistente al envejecimiento, la exposici\u00f3n al sol, al calor, a la humedad y a la radiaci\u00f3n, y es adecuado para medios \u00e1cidos y alcalinos d\u00e9biles. Buenas propiedades aislantes.<\/li>\r\n \t<li>El rango de temperatura aplicable puede ser tan bajo como -40 \u2103 \u2013 60 \u2103, y se puede utilizar durante mucho tiempo en condiciones de temperatura de 130 \u2103.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li>Caucho de nitrilo (NBR): resistencia al aceite, resistencia al calor, resistencia a la abrasi\u00f3n y buena resistencia al agua, estanqueidad al aire y excelentes propiedades de uni\u00f3n. Es ampliamente utilizado en oleoductos. La desventaja es que no es resistente a las bajas temperaturas, al ozono, al bajo rendimiento de aislamiento y a la elasticidad general.<\/li>\r\n \t<li>Politetrafluoroetileno (PTFE): un fluoropl\u00e1stico, este material tiene una fuerte resistencia a \u00e1cidos, \u00e1lcalis y diversos disolventes org\u00e1nicos. Al mismo tiempo, el material es resistente a altas temperaturas y se puede utilizar de forma continua a 260\u00b0C, y la temperatura m\u00e1xima de uso puede alcanzar 290-320\u00b0C. La aparici\u00f3n del PTFE ha resuelto con \u00e9xito muchos problemas en las industrias qu\u00edmica, petrolera, farmac\u00e9utica y otras.<\/li>\r\n \t<li>VITON (V): Clasificado para temperaturas de 0\u00b0F a 300\u00b0F. Viton es una marca registrada de EI DuPont. Flour es la marca registrada de 3M para el elast\u00f3mero de fluorocarbono equivalente. Este material ofrece una mayor resistencia a la temperatura y una excelente resistencia qu\u00edmica. Es resistente a productos hidrocarburos y \u00e1cidos minerales, tanto en soluciones diluidas como concentradas. Sin embargo, nunca debe usarse en aplicaciones de vapor y es relativamente pobre en servicio de agua.<\/li>\r\n \t<li>Sello duro de metal (aleaci\u00f3n dura): El material del asiento de la v\u00e1lvula de sello duro de metal tiene muy buena resistencia a altas temperaturas y altas presiones, resistencia a la corrosi\u00f3n, resistencia al desgaste y otras caracter\u00edsticas, lo que compensa los defectos del material del sello blando que es no resistente a altas temperaturas y alta presi\u00f3n. Sin embargo, el material de sellado duro tiene altos requisitos en cuanto a la tecnolog\u00eda de procesamiento. La \u00fanica desventaja del asiento de v\u00e1lvula de sello duro de metal es que el rendimiento del sellado es deficiente y se producir\u00e1n fugas despu\u00e9s de un largo tiempo de funcionamiento.<\/li>\r\n<\/ol>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>\u00bfQu\u00e9 tipo de material debo utilizar?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nAlgunas caracter\u00edsticas del asiento de la v\u00e1lvula de mariposa se superponen con otras. A continuaci\u00f3n se muestra una comparaci\u00f3n lado a lado de estos materiales.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<strong>EPDM frente a BUNA<\/strong>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEPDM es resistente a \u00e1lcalis, \u00e1cidos y cetonas. EPDM no es adecuado para aplicaciones que involucran combustibles a base de petr\u00f3leo, aceite y solventes no polares, pero BUNA s\u00ed lo es.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nSi bien tanto el EDPM como el BUNA son resistentes a la abrasi\u00f3n y al desgarro, el EDPM es m\u00e1s resistente al calor que el BUNA. Al comparar EDPM con BUNA, EDPM es mejor para aplicaciones en exteriores, ya que resiste los elementos.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<strong>VITON VS BUNA<\/strong>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nVITON y BUNA son resistentes a la deformaci\u00f3n por compresi\u00f3n y soportan la mayor\u00eda de los aceites, lubricantes y materiales a base de petr\u00f3leo.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nAl comparar VITON vs BUNA, la principal diferencia es la resistencia a la temperatura. VITON mantiene un sello con temperaturas aproximadamente 150\u00b0 m\u00e1s altas que las de BUNA. Sin embargo, BUNA puede mantener el sello en temperaturas mucho m\u00e1s fr\u00edas que VITON.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nVITON resiste mejor los elementos exteriores que BUNA, pero se considera que BUNA es mejor para aplicaciones industriales de servicio pesado.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<strong>EPDM versus PTFE<\/strong>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEPDM es un mon\u00f3mero y PFTE (tefl\u00f3n) es un fluoropol\u00edmero. Al comparar EPDM con PFTE, la tolerancia a la temperatura y la flexibilidad son las principales diferencias. El PTFE puede soportar una gama m\u00e1s amplia de temperaturas tanto fr\u00edas como calientes.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEl EPDM es un caucho resistente al desgarro que soporta movimientos repetitivos, mientras que el PFTE es inel\u00e1stico. El PTFE es ideal para procesos petroleros, mientras que el EPDM es adecuado para aplicaciones HVAC.\r\n\r\n<!-- \/wp:paragraph -->","link":"https:\/\/zecovalve.com\/es\/categoria-de-productos\/butterfly-valve\/butterfly-valve-by-material","name":"V\u00e1lvula de mariposa por material","slug":"butterfly-valve-by-material","taxonomy":"product_cat","parent":2044,"meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Butterfly Material - Butterfly Valve Seat Material | Butterfly Valve Manufacturer - 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\/es\/categoria-de-productos\/butterfly-valve\/butterfly-valve-by-material\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Butterfly Material - Butterfly Valve Seat Material | Butterfly Valve Manufacturer - ZECO\" \/>\n<meta property=\"og:description\" content=\"GET BUTTERFLY VALVE MATERIAL PRICE  Butterfly Valve Material  There is various kind of materials available for butterfly valve to suit the requirement of different application, such as A216 WCB, A216 WCC, A217 WC6, A217 WC9, and so on. According to our rich experience and industry needs, we select the proper material to produce butterfly valves. Currently, we mainly supply stainless steel butterfly valves and cryogenic butterfly valves. You may click the product to get more details.  Butterfly Valves for Sale List by Material    Stainless Steel Butterfly Valve\/ GET VALVE PRICE &gt;  Stainless Steel Butterfly Valve ZECO stainless steel butterfly valve is a kind of butterfly valve with high performance and long service life. It is mainly composed of driving devices and stainless steel parts.\/ GET VALVE PRICE &gt;    Cryogenic Butterfly Valve\/ GET VALVE PRICE &gt;  Cryogenic Butterfly Valve ZECO cryogenic butterfly valve body volume is small and symmetrical in shape, and the wall thickness is uniform.\/ GET VALVE PRICE &gt;    Introduction of Butterfly Valve Material  A216 WCB and A216 WCC are commonly used materials for the butterfly valve bodies and disc, they are suitable for water, oil, gas, steam, and other non-corrosive media, some times they can also be used for sour service after disposing of NACE MR-01-75 or NACE MR-01-03 and consider corrosion allowance in. It should be noticed that they are not suitable for low-temperature below -29\u2103 and high-temperature over 425\u2103.  WCC Valve Body  Grade WCC is covered by ASTM A216 standard, which specification covers carbon steel castings for valves, fittings, flanges, and other pressure-containing parts for high-temperature service and the quality required for assembly with other castings or wrought steel parts by fusion welding.  A217 WC6 and A217 WC9 are usually used for high-temperature applications, usually, the medium is high-temperature steam or hot air, for such applications, the valve is with metal to metal seat or SS+Graphite seat ring. In order to achieve tight shut-off, these valves are usually of a triple eccentric design.  WC6 Valve Body  ASTM A217 Gr. WC6 Valves are made up of WC6 material. The specification ASTM A217 includes a low alloy steel group of molybdenum and chromium molybdenum steels. The WC6 material is 1 \u00bc chromium \u00bd molybdenum steel.  A352 LCB and A352 LCC are usually used for low-temperature applications, usually, the medium is of low-temperature but over -46\u2103 or the valve is installed outdoors in an area of a cold environment. But these materials can not be used for high-temperature over 345\u2103.  A351 CF8, A351 CF8M, A351 CF3, and A351 CF3M, these austenitic stainless steel that is anti-rust and anti-corrosion, suitable for the medium of various kinds of acid. They also perform great for low-temperature and high-temperature applications but their cost of them is much higher than carbon steel.  Aluminum-bronze like B148 C95500 and B148 C95800 are perfectly suitable for seawater application. Al-Bronze butterfly valve is widely used in offshore applications and seawater pipelines. Because the cost of it is high, a big-size butterfly valve usually uses as a disc material for centerline design.  Duplex Steel A890 4A, A890 5A, SAF2205, S31803 and super duplex steel A890 6A, SAF2507, and S32750 have similar application range of Al-Bronze, they have good resistance to chloride corrosion, so they are widely used for seawater application and produced water application.  What is a Seat On a Valve?  Essentially, a valve seat is where the moving component of a valve rests when in the closed position. In butterfly valve applications, the disc rests securely on the seat to close and seal the valve. Seats are designed to keep the seal intact despite the thermal, friction, and impact stresses of a process.  Introduction of Butterfly Valve Seat Material  The valve seat is a detachable part inside the valve. Its main function is to support the valve core to be fully closed or fully closed and to form a sealing pair. Under normal circumstances, the diameter of the valve seat is the size of the valve. The butterfly valve seat is made of a wide range of materials, but the commonly used materials include soft-seal EPDM, nitrile rubber (NBR), polytetrafluoroethylene (PTFE), and metal hard-seal hard alloy materials. kind. Let\u2019s introduce them one by one below.  EPDM: Compared with other general-purpose rubbers, EPDM has great advantages. The cost performance is very high. Among the commonly used rubbers, EPDM has the lightest raw rubber density and can be filled in a large amount, reducing the cost of the rubber. EPDM material is resistant to aging, sun exposure, heat resistance, moisture resistance, and radiation resistance, and is suitable for weak acid and weak alkali media. Good insulation properties. The applicable temperature range can be as low as -40\u2103\u201360\u2103, and it can be used for a long time under the temperature condition of 130\u2103.  Nitrile rubber (NBR): oil resistance, heat resistance, abrasion resistance and good water resistance, air tightness, and excellent bonding properties. It is widely used in petroleum pipelines. The disadvantage is that it is not resistant to low temperatures, ozone, poor insulation performance, and general elasticity. Polytetrafluoroethylene (PTFE): A fluoroplastic, this material has strong resistance to acids, alkalis, and various organic solvents. At the same time, the material is resistant to high temperatures and can be used continuously at 260\u00b0C, and the maximum use temperature can reach 290-320\u00b0C. The emergence of PTFE has successfully solved many problems in the chemical, petroleum, pharmaceutical, and other industries. VITON (V): Rated for temperatures 0\u00b0F to 300\u00b0F. Viton is an E.I. DuPont trademark. Flour is 3M\u2019s trademark for the equivalent fluorocarbon elastomer. This material offers higher temperature resistance and outstanding chemical resistance. It is resistant to hydrocarbon products and mineral acids, both dilute and concentrated solutions. However, it is never to be used in steam applications and is relatively poor in water service. Metal hard seal (hard alloy): The material of the metal hard seal valve seat has very good high temperature and high-pressure resistance, corrosion resistance, wear resistance, and other characteristics, which makes up for the defects of soft seal material that is not resistant to high temperature and high pressure. However, the hard seal material has high requirements on the processing technology. The only disadvantage of the metal hard seal valve seat is that the sealing performance is poor, and leakage will occur after a long time of operation.  What Type of Material Should I Use?  Some butterfly valve seat characteristics overlap with others. Below is a side-by-side comparison of these materials.  EPDM vs BUNA  EPDM is resistant to alkalis, acids, and ketones. EPDM is not suitable for applications that involve petroleum-based fuels, oil, and non-polar solvents, but BUNA is.  While both EDPM and BUNA are abrasion and tear-resistant, EDPM is more heat-resistant than BUNA. When comparing EDPM vs BUNA, EDPM is better for outdoor applications as it stands up to elements.  VITON VS BUNA  VITON and BUNA are both compression set resistant and endure most oils, lubricants, and petroleum-based materials.  When comparing VITON vs BUNA, the main difference is temperature resistance. VITON maintains a seal with temperatures about 150\u00b0 hotter than BUNA would. However, BUNA can maintain a seal in much colder temperatures than VITON.  VITON stands up better for outdoor elements than BUNA, but BUNA is considered to be better for heavy-duty industrial applications.  EPDM VS PTFE  EPDM is a monomer and PFTE (Teflon) is a fluoropolymer. When comparing EPDM vs PFTE, temperature tolerance and flexibility are the main differences. PTFE can withstand a wider range of temperatures of both cold and hot extremes.  EPDM is a tear-resistant rubber that endures repetitive motion, whereas PFTE is inelastic. 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