{"id":17467,"date":"2022-06-27T15:04:40","date_gmt":"2022-06-27T15:04:40","guid":{"rendered":"https:\/\/zecovalve.com\/?p=17467"},"modified":"2022-09-10T23:58:07","modified_gmt":"2022-09-10T23:58:07","slug":"basic-knowledge-of-concentric-butterfly-valve","status":"publish","type":"post","link":"https:\/\/zecovalve.com\/es\/basic-knowledge-of-concentric-butterfly-valve.html","title":{"rendered":"Conocimientos b\u00e1sicos de la v\u00e1lvula de mariposa conc\u00e9ntrica"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"h-notices-for-operation-and-maintenance-of-concentric-butterfly-valve\">Avisos para operaci\u00f3n y mantenimiento de v\u00e1lvula de mariposa conc\u00e9ntrica.<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>1. La v\u00e1lvula de mariposa conc\u00e9ntrica debe estar completamente abierta y cerrada peri\u00f3dicamente durante el funcionamiento; de lo contrario, la v\u00e1lvula se oxidar\u00e1.<\/li><li>2. Si el cierre no es estricto durante el proceso de cierre, la v\u00e1lvula debe abrirse completamente nuevamente y cerrarse nuevamente despu\u00e9s de usar la presi\u00f3n hidr\u00e1ulica de la tuber\u00eda para eliminar las impurezas en la pared interior de la tuber\u00eda.<\/li><li>3. Filtre las impurezas en la tuber\u00eda en la medida de lo posible para evitar que la v\u00e1lvula de mariposa exprima la superficie de sellado cuando se cierra, lo que provoca el fen\u00f3meno de que no se puede cerrar por completo.<\/li><li>4. Si la v\u00e1lvula est\u00e1 en un rango de aceleraci\u00f3n mayor, la parte posterior del plato de la v\u00e1lvula es propensa a la cavitaci\u00f3n, lo que puede da\u00f1ar la v\u00e1lvula. Generalmente, la v\u00e1lvula se utiliza en un estado superior a 15 grados.<\/li><li>5. Prevenir da\u00f1os mec\u00e1nicos de las v\u00e1lvulas y deteriorar la calidad de las v\u00e1lvulas debido a la erosi\u00f3n de sedimentos, qu\u00edmicos o gases h\u00famedos en la atm\u00f3sfera.<\/li><li>6. Las interfaces de trabajo como roscas, cojinetes o engranajes deben lubricarse peri\u00f3dicamente.<\/li><\/ul>\n\n\n\n<p>Cuando el\u00a0<strong>v\u00e1lvula de mariposa conc\u00e9ntrica<\/strong>\u00a0est\u00e1 en la abertura central, el mecanismo operativo debe bloquearse solo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Posibles fallas, causas y m\u00e9todos de mantenimiento de la v\u00e1lvula de mariposa conc\u00e9ntrica.<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Posibles fallas<\/strong><\/td><td><strong>Posibles Causas<\/strong><\/td><td><strong>M\u00e9todos de eliminaci\u00f3n<\/strong><\/td><\/tr><tr><td>Fuga de embalaje<\/td><td>1. La tapa del embalaje no est\u00e1 presionada.<br>2. La cantidad de anillos de empaquetadura es menor de la necesaria.<br>3. El empaque falla porque ha estado en uso por demasiado tiempo o no est\u00e1 adecuadamente conservado.<\/td><td>1. Apriete la tuerca uniformemente.<br>2. Aumente el n\u00famero de anillos de empaquetadura.<br>3. Reemplace la empaquetadura nueva (las juntas de cada anillo deben estar al tresbolillo).<\/td><\/tr><tr><td>Fugas entre pares de sellado<\/td><td>4. La superficie de sellado tiene suciedad adherida.<\/td><td>4. Para eliminar o reprocesar, recortar o reemplazar la suciedad.<\/td><\/tr><tr><td>El accionamiento es inflexible o la parte de cierre no se puede abrir ni cerrar<\/td><td>6. La presi\u00f3n de embalaje es demasiado fuerte.<br>7. Dispositivo de prensaestopas torcido.<br>8. Da\u00f1o al mecanismo de accionamiento o a la conexi\u00f3n.<\/td><td>6. Afloje correctamente la tuerca del prensaestopas.<br>7. Tapa de presi\u00f3n de empaque correcta.<br>8. Para retirar una unidad o conector para su reparaci\u00f3n.<\/td><\/tr><tr><td>Fuga en la superficie de sellado de la brida en ambos extremos de la v\u00e1lvula<\/td><td>9. La junta de sellado en ambos lados no es v\u00e1lida.<br>10. Fuerza de preapriete desigual del perno de conexi\u00f3n de brida en ambos lados de la tuber\u00eda.<\/td><td>9. Vuelva a colocar la junta en ambos lados.<br>10. Apriete los pernos de conexi\u00f3n uniformemente.<\/td><\/tr><\/tbody><\/table><\/figure>","protected":false},"excerpt":{"rendered":"<p>Avisos para el funcionamiento y mantenimiento de la v\u00e1lvula de mariposa conc\u00e9ntrica 1. La v\u00e1lvula de mariposa conc\u00e9ntrica debe estar completamente abierta y cerrada peri\u00f3dicamente durante el funcionamiento,\u2026 <a title=\"Conocimientos b\u00e1sicos de la v\u00e1lvula de mariposa conc\u00e9ntrica\" class=\"read-more\" href=\"https:\/\/zecovalve.com\/es\/basic-knowledge-of-concentric-butterfly-valve.html\" aria-label=\"M\u00e1s en Conocimientos b\u00e1sicos de v\u00e1lvulas de mariposa conc\u00e9ntricas\">Leer m\u00e1s<\/a><\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","kt_blocks_editor_width":"","footnotes":""},"categories":[2210],"tags":[2629,1881,3657,3192],"class_list":["post-17467","post","type-post","status-publish","format-standard","hentry","category-butterfly-valve","tag-api-609-butterfly-valve","tag-butterfly-valve-wikipedia","tag-center-line-butterfly-valve","tag-china-epdm-butterfly-valve","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"featured_image_src_large":false,"author_info":{"display_name":"Jerry","author_link":"https:\/\/zecovalve.com\/es\/author\/jerry"},"comment_info":0,"category_info":[{"term_id":2210,"name":"Butterfly Valve","slug":"butterfly-valve","term_group":0,"term_taxonomy_id":2210,"taxonomy":"category","description":"","parent":0,"count":49,"filter":"raw","cat_ID":2210,"category_count":49,"category_description":"","cat_name":"Butterfly Valve","category_nicename":"butterfly-valve","category_parent":0}],"tag_info":[{"term_id":2629,"name":"API 609 Butterfly Valve","slug":"api-609-butterfly-valve","term_group":0,"term_taxonomy_id":2629,"taxonomy":"post_tag","description":"<!-- wp:heading -->\r\n<h2>What is API 609 Standard?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nAPI 609 is the American design standard for butterfly valves, which is divided into Category A and B.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-what-is-an-api-609-butterfly-valve\">What is an API 609 Butterfly Valve?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA butterfly valve is used to shut off or modulate the flow of a fluid (isolation and regulation). API 609 Centric butterfly valves (soft seated) are preferred to gate and ball valves for low-pressure and non-critical applications as they are cheaper, lighter, and easier to install. Eccentric butterfly valves (double offset and triple offset valves) with metal seats have surged in popularity and compete with globe and ball valves for some applications.\r\n\r\n<!-- \/wp:paragraph -->\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=\"https:\/\/zecovalve.com\/contact\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>GET API 609 BUTTERFLY VALVE PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Types of API 609 Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>API 609 Category A Butterfly Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe Centric or concentric butterfly valve is the primary type of butterfly valve design. In this design of the valve, the stem crosses from the centerline of the disc. Between the pipe bore and the seat, there is the inside diameter boundary. This zero-offset valve is also called resilient-seated because it relies on the adaptability of the seat rubber to seal the flow after closing it efficiently. At around 85\u00b0 during a 90\u00b0 rotation, the disc first comes into connection with the seat in this kind of valve. Concentric butterfly valves are generally used for low-pressure applications.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>API 609 Category B Butterfly Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nIn the eccentric butterfly valve, the stem passes behind the centerline of the disc instead of passing through it. As the stem is positioned behind the centerline, the valve is called a single offset. This design helps to minimize the disc contact with the seal, which increases the service life of the valve. In double-offset butterfly valves or doubly eccentric butterfly valves, the stem is positioned at the backside of the disc with an extra offset. This stem design allows the rotating disc to cover the seat only for one to three degrees. A triple offset butterfly valve is frequently used in more complex applications that have the same design as a double offset butterfly valve. A triple offset butterfly valve is efficient and reduces wear. This valve has metal seats that create a bubble-tight shut-off and make it able to use in higher temperature applications.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":9,"filter":"raw"},{"term_id":1881,"name":"Butterfly Valve Wikipedia","slug":"butterfly-valve-wikipedia","term_group":0,"term_taxonomy_id":1881,"taxonomy":"post_tag","description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_49a87c-f7\"} \/-->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-what-is-a-butterfly-valve\">What is a Butterfly Valve?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nButterfly Valve is a valve that can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of Ball Valves, which allows for quick shut-off. Butterfly valves are generally favored because they are lower in cost than other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position.\r\n\r\n<!-- \/wp:paragraph -->\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=\"https:\/\/zecovalve.com\/contact\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>GET BUTTERFLY VALVE PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Types of Butterfly Valves<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li><strong>Concentric Butterfly Valve<\/strong>\r\n<ul>\r\n \t<li>The most basic design of a butterfly valve is a centric or concentric butterfly valve. The stem passes through the disc\u2019s centerline, and the seat is the inside diameter periphery of the valve body (Figure 4 on the left). This zero-offset valve design is known as resilient-seated because efficient sealing relies on the flexibility of the rubber seat. When closing, the disc first comes into contact with the seat at around 85\u00b0 during a 90\u00b0 rotation. Concentric butterfly valves are suitable for low-pressure ranges.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Double Offset Butterfly Valve<\/strong>\r\n<ul>\r\n \t<li>This popular valve is also known as a high-performance butterfly valve. This valve has two stems offset from the center. This creates a cam action during the application's process.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Triple Offset Butterfly Valve<\/strong>\r\n<ul>\r\n \t<li>Triple Offset Butterfly Valves are essential in applications where a bubble-tight shut-off is required. In some applications, bubble-tight shut-off cannot be achieved using double offset butterfly valves. Some applications do not lend themselves well to traditional butterfly valves, for example, applications involving harsh chemicals or media with small particles prone to clogging valves and pipelines.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Gate Valve vs Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nButterfly valves are comparatively more extensively used in large sizes compared to gate valves. Because butterfly valves open and close quickly and can be frequently operated, they are ideal for applications that require quick opening and closing, especially for emergency shutoffs.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":11,"filter":"raw"},{"term_id":3657,"name":"Center line Butterfly Valve","slug":"center-line-butterfly-valve","term_group":0,"term_taxonomy_id":3657,"taxonomy":"post_tag","description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_e4c4a1-9b\"} \/-->\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>GET CENTERLINE BUTTERFLY VALVE PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA resilient seated butterfly valve with superior design features and materials of construction to provide repeatable tight shutoff in severe abrasive and corrosive environments for a variety of applications.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Standard of Centerline Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>Flange Standard.:DIN2501, BS10-D, BS4504, ANSI B16.1, B16.42, JIS B2239<\/li>\r\n \t<li>Valve Tested: API598<\/li>\r\n \t<li>Face to Face: DIN3202-K1, EN558-1 20 SERIES, BS5155, MSS SP-67<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Material of Centerline Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:table -->\r\n<figure class=\"wp-block-table\">\r\n<table>\r\n<tbody>\r\n<tr>\r\n<td><strong>o<\/strong><\/td>\r\n<td><strong>Parts Name<\/strong><\/td>\r\n<td><strong>Material<\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>1<\/td>\r\n<td>Body<\/td>\r\n<td>C.I. \/ D.I. \/ C.S.\u00a0\/ S.S.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>2<\/td>\r\n<td>Disc<\/td>\r\n<td>A536 60-40-18 \/ CF8 \/ CF8M \/ Br \/ AI-Br<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>3<\/td>\r\n<td>Seat<\/td>\r\n<td>NBR \/ EPDM \/ VITON \/ PTFE<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>4<\/td>\r\n<td>Stem<\/td>\r\n<td>SS410 \/ SS304 \/ SS216<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>5<\/td>\r\n<td>Pin<\/td>\r\n<td>SS304 \/ SS316<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>6<\/td>\r\n<td>Bushing<\/td>\r\n<td>PTFE \/ Bronze<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>7<\/td>\r\n<td>O-Ring<\/td>\r\n<td>NBR \/ EPDM \/ VITON<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>8<\/td>\r\n<td>Key<\/td>\r\n<td>Carbon Steel \/ SUS304 \/ SUS316<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n<!-- \/wp:table -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Design Features of Centerline Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Corrosion Resistance<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nWith Centerline Butterfly Valves only two parts of the valve come in contact with the medium. This means that neither the body nor mechanical parts such as the shaft are exposed to the corrosive environment.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe only two parts in contact with the medium are the body lining and the disc. These are available in a selection of materials so that a suitable corrosion-resistant combination can be chosen for most any application.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Bi-directional Shutoff<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nCenterline Butterfly Valves are liquid and gas-tight in both flow directions. The disc presses with uniform compression into the elastic cartridge seat over the entire circumference of the valve.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Replaceable Seat<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe replaceable seat consists of a reinforced backup ring, on which the elastomer seat material is vulcanized. When mounting the valve between the pipe flanges this stable seat cannot be deformed or displaced. The cartridge design also prevents deformation when the valve is cycled, such as stretching and bulging of the elastomer in front of the moving disc.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe fixed connection between the elastomer and the backup ring allows the use of the valve in a full vacuum and high flow velocities. The slightly protruding sealing lip of the seat also serves as the flange seal.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-features-of-centerline-butterfly-valve\">Features of Centerline Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>Suitable for both gaseous and liquid service<\/li>\r\n \t<li>Phenolic Backed Seat for superior sealing and long term use<\/li>\r\n \t<li>Single-piece stem design assures even torque distribution<\/li>\r\n \t<li>Positive shutoff bi-directionally<\/li>\r\n \t<li>Direct mount automation<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Applications of Centerline Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>HVAC<\/li>\r\n \t<li>Chemical\/Petrochemical Processing<\/li>\r\n \t<li>Food and Beverage<\/li>\r\n \t<li>Power and Utilities<\/li>\r\n \t<li>Pulp and Paper<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->","parent":0,"count":12,"filter":"raw"},{"term_id":3192,"name":"China EPDM Butterfly Valve","slug":"china-epdm-butterfly-valve","term_group":0,"term_taxonomy_id":3192,"taxonomy":"post_tag","description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_d933f8-47\"} \/-->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-what-is-epdm-butterfly-valve\">What is EPDM Butterfly Valve?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEPDM is the abbreviated name for Ethylene Propylene Diene Monomer. In general industry, one may see other abbreviations or trade names used in lieu of EPDM such as EPT, Nordel, ECD, or EPR. All of these are the same materials as EPDM. EPDM is a standard seat material offered in Bray resilient-seated butterfly valves.\r\n\r\n<!-- \/wp:paragraph -->\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>GET CHINA EPDM BUTTERFLY VALVE PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Specifications of EPDM Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:table {\"className\":\"is-style-stripes\"} -->\r\n<figure class=\"wp-block-table is-style-stripes\">\r\n<table>\r\n<tbody>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Design Standard<\/td>\r\n<td class=\"has-text-align-left\" data-align=\"left\">EN 593,\u00a0MSS SP67\u00a0\u00a0\u00a0API 609\u00a0\u00a0BS5155<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Inspection &amp;\u00a0Test<\/td>\r\n<td class=\"has-text-align-left\" data-align=\"left\">API 598\u00a0\u00a0ISO 5208\u00a0\u00a0EN 12266<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">End Standard<\/td>\r\n<td class=\"has-text-align-left\" data-align=\"left\">ANSI B16.1 CL. 125LB &amp;\u00a0B16.5 CL. 150LBAS 2129 Table D\u00a0&amp; E\u00a0\u00a0\u00a0BS 10 Table D\u00a0&amp; EDIN 2501 PN6, PN10 &amp;\u00a0PN16EN 1092 PN6, PN10 &amp;\u00a0PN16ISO 2531 PN6, PN10 &amp;\u00a0PN16ISO 7005 PN6, PN10 &amp;\u00a0PN16KS B\u00a01511 \/\u00a0JIS B\u00a02210 5K &amp;\u00a010KMSS SP44 CL. 150LB\u00a0\u00a0AWWAC207SABS 1123 Table 1000\/3 &amp;\u00a0Table 1600\/3<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Face to Face<\/td>\r\n<td class=\"has-text-align-left\" data-align=\"left\">ISO 5752,\u00a0EN 558,\u00a0MSS SP67, and API 609\u00a0\u00a0DIN3202<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Top Flange<\/td>\r\n<td class=\"has-text-align-left\" data-align=\"left\">ISO 5211<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n<!-- \/wp:table -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Types of China EPDM Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li><strong>Wafer Butterfly valves<\/strong>\r\n<ul>\r\n \t<li>Equipped with a tightly fitting seal, o ring, and a flat valve face, Wafer Butterfly valves have good control of flow, which assures unidirectional flow.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Flanged Butterfly valves<\/strong>\r\n<ul>\r\n \t<li>These Flanged Butterfly valves with flanges on both ends. The flange ends connect with the flanges on the pipeline by bolts.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Lug-Style Butterfly valves<\/strong>\r\n<ul>\r\n \t<li>A Lug-Style Butterfly valve has the function of reducing pressure rating.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Welded Butterfly valves<\/strong>\r\n<ul>\r\n \t<li>Butt Weld Butterfly valves and Socket Weld Butterfly valves are two commonly used Welded Butterfly valves. These kinds of valves are of the enclosed type, helping to both on-off and regulate service.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Parts of EPDM Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:table {\"className\":\"is-style-stripes\"} -->\r\n<figure class=\"wp-block-table is-style-stripes\">\r\n<table>\r\n<tbody>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Parts<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Material<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Body<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Cast iron, Ductile iron, WCB<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Seat<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">EPDM, NBR, VITON, PTFE<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Disc<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Nickel ductile iron, AI bronze, Stainless Steel<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Stem<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Stainless Steel, Monel<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Bushing<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">PTFE<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">\"O\" ring<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">PTFE<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Pin<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Stainless Steel<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Key<\/td>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Stainless Steel<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n<!-- \/wp:table -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Advantages of EPDM Butterfly Valve<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nButterfly valves are similar to ball valves but have more advantages. They are open and close very quickly when actuated pneumatically. The disc is lighter than a ball, and the valves require less structural support than a ball valve of comparable diameter. Butterfly valves are very precise, which makes them advantageous in industrial applications. They are quite reliable and require very little maintenance.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:list {\"ordered\":true} -->\r\n<ol>\r\n \t<li>Turning on\/off easily and rapidly with less force. Having less fluid resistance and can be operated frequently.<\/li>\r\n \t<li>Simple structure, small size, and short face-to-face dimension, which are suitable for large-diameter valves.<\/li>\r\n \t<li>It can be used for transmitting mud, fewer liquids are stored at the apertures of the pipe.<\/li>\r\n \t<li>Long service life. Standing the test of tens of thousands of opening\/closing operations.<\/li>\r\n \t<li>Butterfly valves have excellent regulation performance.<\/li>\r\n \t<li>Small torque. The pressure on discs at the two sides of the spindle is almost equal, causing contrary torque. Thereby, the valves can be opened with less force.<\/li>\r\n \t<li>A sealing face is generally made of rubber or plastic. So the butterfly valves can be with good sealing under low pressure.<\/li>\r\n<\/ol>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>EPDM Butterfly Valve - China Manufacturers, Factory, Suppliers<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nWe'll make each hard work to become excellent and excellent, and speed up our measures for standing from the rank of intercontinental top-grade and high-tech enterprises for Epdm Butterfly Valve, Rubber Lined Double Flange Butterfly Valve, Butterfly Valve Wafer, Electric Actuator Butterfly Valve, Lug Support Butterfly Valve. We warmly welcome friends from all walks of existence to cooperate with us. The product will supply to all over the world, such as in Europe, America, Australia, Zurich, Mexico, Greece, and Azerbaijan. We have top engineers in these industries and an efficient team in the research. What is more, we have our own archives mouths and markets in China at a low cost. Therefore, we can meet different inquiries from different clients. Please find our website to check more information about our products.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":7,"filter":"raw"}],"taxonomy_info":{"category":[{"value":2210,"label":"Butterfly Valve"}],"post_tag":[{"value":2629,"label":"API 609 Butterfly Valve"},{"value":1881,"label":"Butterfly Valve Wikipedia"},{"value":3657,"label":"Center line Butterfly Valve"},{"value":3192,"label":"China EPDM Butterfly Valve"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Basic Knowledge Of Concentric 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\/es\/basic-knowledge-of-concentric-butterfly-valve.html\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Basic Knowledge Of Concentric Butterfly Valve - ZECO Valve\" \/>\n<meta property=\"og:description\" content=\"Notices for operation and maintenance of concentric butterfly valve 1. 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