{"id":11720,"date":"2022-01-04T12:36:11","date_gmt":"2022-01-04T12:36:11","guid":{"rendered":"https:\/\/zecovalve.com\/introduction-of-epdm-nbr-butterfly-valve-seat-industrial-valve-information-news-zeco-valve.html"},"modified":"2022-10-17T06:11:26","modified_gmt":"2022-10-17T06:11:26","slug":"introduction-of-epdm-nbr-butterfly-valve-seat-industrial-valve-information-news-zeco-valve","status":"publish","type":"post","link":"https:\/\/zecovalve.com\/tr\/introduction-of-epdm-nbr-butterfly-valve-seat-industrial-valve-information-news-zeco-valve.html","title":{"rendered":"EPDM ve NBR Kelebek Vana Koltu\u011funun Tan\u0131t\u0131m\u0131"},"content":{"rendered":"<p>ZECO kelebek vanalar genellikle kelebek CI, kelebek WCB, kelebek bronz ve kelebek paslanmaz \u00e7elik olarak s\u0131n\u0131fland\u0131r\u0131l\u0131r. Kelebek vanalar, genellikle kolla \u00e7al\u0131\u015ft\u0131rma kullan\u0131larak 2 in\u00e7ten 8 in\u00e7&#039;e kadar boyutlarda mevcuttur; 8 in\u00e7lik kelebek vanalar\u0131n \u00fczerinde, kau\u00e7uk koltuktaki tork genellikle turbo, pn\u00f6matik veya elektrikle \u00e7al\u0131\u015ft\u0131rmayla ba\u015flayarak artar.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-a-butterfly-valve-seat\">nedir <a href=\"https:\/\/zecovalve.com\/tr\/urun-kategori%cc%87si%cc%87\/butterfly-valve\/concentric-butterfly-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\"><mark style=\"background-color:var(--base)\" class=\"has-inline-color has-contrast-2-color\">kelebek vana<\/mark><\/a> koltuk?<\/h2>\n\n\n\n<p>Kelebek vana yuvas\u0131, vanan\u0131n hareketli par\u00e7alar\u0131n\u0131n kapal\u0131 konumda durdu\u011fu yerdir. Kelebek vana uygulamalar\u0131nda disk, vanay\u0131 kapatmak ve s\u0131zd\u0131rmaz hale getirmek i\u00e7in yuvaya s\u0131k\u0131ca oturur. Koltuk, \u0131s\u0131, s\u00fcrt\u00fcnme ve prosesin \u015fok bas\u0131nc\u0131 alt\u0131nda contan\u0131n b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc koruyacak \u015fekilde tasarlanm\u0131\u015ft\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Valf yuvalar\u0131 de\u011fi\u015ftirilebilir mi?<\/h2>\n\n\n\n<p>Kelebek vana yuvalar\u0131 de\u011fi\u015ftirilebilir yuvalar olarak \u00fcretilebilir, orijinal yuva contas\u0131 hasardan etkilenir, orijinal yuva \u00e7\u0131kar\u0131l\u0131r, yeni bir yuva ile de\u011fi\u015ftirilir, kullan\u0131ma devam edilebilir, ancak valf g\u00f6vdesi \u00fczerindeki yuvan\u0131n vulkanizasyonu de\u011fi\u015ftirilemez.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kelebek Vana Yuvas\u0131 Se\u00e7im K\u0131lavuzu<\/h2>\n\n\n\n<p>Kau\u00e7uk koltuklu kelebek vanan\u0131n uygulanabilir ortam\u0131, farkl\u0131 kau\u00e7uk malzemelere g\u00f6re farkl\u0131d\u0131r. Yayg\u0131n kau\u00e7uk valf yuvas\u0131 malzemeleri aras\u0131nda EPDM kau\u00e7uk, nitril kau\u00e7uk (NBR) ve PTFE bulunur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">EPDM koltuk nedir?<\/h3>\n\n\n\n<p>EPDM kau\u00e7uk: EPDM, Etilen Propilen Dien Monomer&#039;in k\u0131saltmas\u0131d\u0131r. Di\u011fer genel kau\u00e7uklarla kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda EPDM kau\u00e7uk \u00e7ok uygun maliyetlidir. EPDM malzemesi ya\u015flanmaya, g\u00fcne\u015fe maruz kalmaya, \u0131s\u0131ya, neme ve radyasyona kar\u015f\u0131 dayan\u0131kl\u0131d\u0131r. \u0130yi Yal\u0131t\u0131m performans\u0131na sahiptir. Uygulanabilir s\u0131cakl\u0131k aral\u0131\u011f\u0131 -20-120\u00b0C<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">EPDM ne i\u00e7in kullan\u0131l\u0131r?<\/h3>\n\n\n\n<p>EPDM kelebek vana zay\u0131f asitli ve zay\u0131f alkalili su ve buhar i\u00e7in uygundur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">NBR koltu\u011fu nedir? Buna-N koltu\u011fu nedir?<\/h3>\n\n\n\n<p>Buna N, NBR veya Nitril ile ayn\u0131d\u0131r. NBR, Nitril-Butadien Kau\u00e7u\u011fun k\u0131saltmas\u0131d\u0131r, bu malzeme ya\u011fa ve a\u015f\u0131nmaya kar\u015f\u0131 dayan\u0131kl\u0131d\u0131r, iyi su direncine, hava ge\u00e7irmezli\u011fe ve m\u00fckemmel yap\u0131\u015fma \u00f6zelliklerine sahiptir. Petrol boru hatlar\u0131nda yayg\u0131n olarak kullan\u0131l\u0131r. Dezavantajlar\u0131 zay\u0131f s\u0131cakl\u0131k direnci, ozon direnci, zay\u0131f yal\u0131t\u0131m performans\u0131 ve genel esnekliktir. Nitril kau\u00e7u\u011fun uygulanabilir s\u0131cakl\u0131k aral\u0131\u011f\u0131 0-80\u00b0C&#039;dir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">NBR ne i\u00e7in kullan\u0131l\u0131r?<\/h3>\n\n\n\n<p>NBR kelebek vana, EPDM&#039;den daha fazla ya\u011fa dayan\u0131kl\u0131d\u0131r ve s\u00fct \u00fcr\u00fcnleri, g\u0131da ve s\u0131hhi i\u015fleme hizmetlerinin \u00e7o\u011funu ger\u00e7ekle\u015ftirebilir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">PTFE koltuk nedir?<\/h3>\n\n\n\n<p>PTFE, politetrafloroetilen teriminin k\u0131saltmas\u0131d\u0131r ve s\u0131kl\u0131kla Teflon olarak an\u0131l\u0131r. Bu termoplastik floropolimer d\u00fc\u015f\u00fck s\u00fcrt\u00fcnmeye, kimyasal dirence ve yang\u0131na kar\u015f\u0131 dirence sahiptir. Teflon, esnek oturmal\u0131 kelebek vanalar\u0131n \u00fcretiminde kullan\u0131lmaktad\u0131r.<\/p>\n\n\n\n<p>PTFE, kimyasal i\u015fleme veya petrol ve gaz gibi uygulamalarda uygun maliyetli bir malzemedir. Yal\u0131t\u0131m \u00f6zelli\u011finden dolay\u0131 elektrik uygulamalar\u0131na uyumludur. Ancak y\u00fcksek bas\u0131n\u00e7 ko\u015fullar\u0131nda kullan\u0131lmamal\u0131d\u0131r. PTFE&#039;nin s\u0131cakl\u0131k derecesi -50\u00b0F ile 400\u00b0F aras\u0131ndad\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">PTFE ne i\u00e7in kullan\u0131l\u0131r?<\/h3>\n\n\n\n<p>PTFE kelebek vana, kimyasal proses tesislerinde asit, alkali ve di\u011fer a\u015f\u0131nd\u0131r\u0131c\u0131, g\u0131da i\u015fleme tesisleri ve kimyasallar\u0131n transferi gibi a\u015f\u0131nd\u0131r\u0131c\u0131 ortamlarda ak\u0131\u015f kontrol\u00fc i\u00e7in kullan\u0131l\u0131r. Ayr\u0131ca PTFE kelebek Kelebek vana, petrokimya tesislerinde ve g\u00fcbre, b\u00f6cek ilac\u0131, ka\u011f\u0131t hamuru ve ka\u011f\u0131t i\u015fleme tesisleri ve boyalar gibi di\u011fer end\u00fcstrilerde de kullan\u0131lmaktad\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Buna N VS EPDM, EPDM ve NBR aras\u0131ndaki fark nedir?<\/h3>\n\n\n\n<p>EPDM alkalilere, asitlere ve ketonlara kar\u015f\u0131 dayan\u0131kl\u0131d\u0131r. EPDM, petrol bazl\u0131 yak\u0131tlar, petrol ve polar olmayan solventler i\u00e7eren uygulamalar i\u00e7in uygun de\u011fildir ancak BUNA uygundur.<\/p>\n\n\n\n<p>Hem EPDM hem de BUNA a\u015f\u0131nmaya ve y\u0131rt\u0131lmaya kar\u015f\u0131 dayan\u0131kl\u0131 olmas\u0131na ra\u011fmen EPDM y\u00fcksek s\u0131cakl\u0131klara BUNA&#039;dan daha dayan\u0131kl\u0131d\u0131r. EPDM ile BUNA kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda EPDM, d\u0131\u015f etkenlere dayanabildi\u011fi i\u00e7in d\u0131\u015f mekan uygulamalar\u0131 i\u00e7in daha uygundur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">PTFE VS EPDM, Hangisi daha iyi EPDM veya PTFE?<\/h3>\n\n\n\n<p>EPDM bir monomerdir, oysa PFTE (Teflon) bir floropolimerdir. EPDM ile PFTE kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda s\u0131cakl\u0131k tolerans\u0131 ve esneklik temel farklard\u0131r. PTFE daha geni\u015f bir aral\u0131ktaki so\u011fuk ve a\u015f\u0131r\u0131 s\u0131cak s\u0131cakl\u0131klara dayanabilir.<\/p>\n\n\n\n<p>EPDM, tekrarlanan harekete dayanabilen, y\u0131rt\u0131lmaya kar\u015f\u0131 dayan\u0131kl\u0131 bir kau\u00e7uktur, oysa PFTE esnek de\u011fildir. PFTE petrol prosesleri i\u00e7in idealdir, EPDM ise HVAC uygulamalar\u0131 i\u00e7in uygundur.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignright size-large\"><img decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/01\/20220104123610-61d43f3a1cb57.webp\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/01\/20220104123610-61d43f3a14ade.webp\" alt=\"\"\/><\/figure>\n\n\n\n<!-- Andy:h-related-tags -->\n<h2 id=\"h-related-tags\">\u0130lgili Etiketler :<\/h2>\n<!-- \/Andy:h-related-tags -->\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/\">ZECO Valf<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/difference-between-gate-valves-and-ball-valves.html\/\">S\u00fcrg\u00fcl\u00fc Vana vs K\u00fcresel Vana<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/advantages-and-disadvantages-of-globe-valves.html\/\">Glob Vana Nedir?<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/gate-valve-problems.html\/\">S\u00fcrg\u00fcl\u00fc Vana Onar\u0131m\u0131<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/what-is-an-axial-flow-silent-check-valve.html\/\">Eksenel \u00c7ekvalf Nedir<\/a>\n\n<\/div>\n\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/urun\/manual-gate-valve\/\">Manuel Kumandal\u0131 S\u00fcrg\u00fcl\u00fc Vana \u00dcreticisi<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/tr\/the-function-of-globe-valve-in-pipeline-system.html\/\">Glob Vanalar Nedir?<\/a>\n\n<\/div>\n\n\n<p><\/p>\n<p><!-- wam:article --><\/p>\n<p>\u00d6ncesi ve sonras\u0131yla on makale<\/p>\n<p><a href=\"https:\/\/zecovalve.com\/tr\/introduction-of-vulcanized-seat-butterfly-valve-industrial-valve-information-news-zeco-valve.html\/\">Vulkanize Koltuklu Kelebek Vanan\u0131n Tan\u0131t\u0131m\u0131 \u2013 End\u00fcstriyel vana bilgileri \u2013 Haberler \u2013 Zeco Vana<\/a><\/p>\n<p><a href=\"https:\/\/zecovalve.com\/tr\/wafer-butterfly-valve-installation-industrial-valve-information-news-zeco-valve.html\/\">Wafer Kelebek Vana Montaj\u0131 \u2013 End\u00fcstriyel vana bilgileri \u2013 Haberler \u2013 Zeco Vana<\/a><\/p>\n<p><a href=\"https:\/\/zecovalve.com\/tr\/introducion-of-lug-butterfly-valve-industrial-valve-information-news-zeco-valve.html\/\">Lug Kelebek Vana Tan\u0131t\u0131m\u0131 \u2013 End\u00fcstriyel vana bilgileri \u2013 Haberler \u2013 Zeco Vana<\/a><\/p>\n<p><a href=\"https:\/\/zecovalve.com\/tr\/the-advantage-of-butterfly-valves-industrial-valve-information-news-zeco-valve.html\/\">Kelebek Vanalar\u0131n Avantajlar\u0131 \u2013 End\u00fcstriyel vana bilgileri \u2013 Haberler \u2013 Zeco Vana<\/a><\/p>\n<p><a href=\"https:\/\/zecovalve.com\/tr\/patented-products-lug-butterfly-valve-introduction-industrial-valve-information-news-zeco-valve.html\/\">Patentli \u00dcr\u00fcnler LUG Kelebek Vana Giri\u015f \u2013 End\u00fcstriyel vana bilgileri \u2013 Haberler \u2013 Zeco Vana<\/a><\/p>\n<p><a href=\"https:\/\/zecovalve.com\/tr\/ul-fm-certificate-industry-news-news-zeco-valve.html\/\">UL &amp; FM Sertifikas\u0131 \u2013 Sekt\u00f6rel Haberler \u2013 Haberler \u2013 Zeco Vana<\/a><\/p>\n<p><a href=\"https:\/\/zecovalve.com\/tr\/lug-butterfly-valve-brief-introduction-industrial-valve-information-news-zeco-valve.html\/\">Lug Kelebek Vana K\u0131sa Tan\u0131t\u0131m \u2013 End\u00fcstriyel vana bilgileri \u2013 Haberler \u2013 Zeco Vana<\/a><\/p>\n<p><a href=\"https:\/\/zecovalve.com\/tr\/butterfly-valve-exporting-volume-keep-increasing-industry-news-news-zeco-valve.html\/\">Kelebek Vana \u0130hracat Hacmi Artmaya Devam Ediyor \u2013 Sekt\u00f6rel Haberler \u2013 Haberler \u2013 Zeco Vana<\/a><\/p>\n<p><a href=\"https:\/\/zecovalve.com\/tr\/butterfly-valve-leakage-reasons-and-solutions-industrial-valve-information-news-zeco-valve.html\/\">Kelebek Vana S\u0131z\u0131nt\u0131 Sebepleri ve \u00c7\u00f6z\u00fcmleri \u2013 End\u00fcstriyel vana bilgileri \u2013 Haberler \u2013 Zeco Vana<\/a><\/p>\n<p><a href=\"https:\/\/zecovalve.com\/tr\/what-you-should-know-about-butterfly-valve-industrial-valve-information-news-zeco-valve.html\/\">Kelebek Vana Hakk\u0131nda Bilmeniz Gerekenler \u2013 End\u00fcstriyel vana bilgileri \u2013 Haberler \u2013 Zeco Vana<\/a><\/p>\n<p><!-- \/wam:article --><\/p>","protected":false},"excerpt":{"rendered":"<p>ZECO kelebek vanalar genellikle kelebek CI, kelebek WCB, kelebek bronz ve kelebek paslanmaz \u00e7elik olarak s\u0131n\u0131fland\u0131r\u0131l\u0131r. Kelebek vanalar mevcuttur\u2026 <a title=\"EPDM ve NBR Kelebek Vana Koltu\u011funun Tan\u0131t\u0131m\u0131\" class=\"read-more\" href=\"https:\/\/zecovalve.com\/tr\/introduction-of-epdm-nbr-butterfly-valve-seat-industrial-valve-information-news-zeco-valve.html\" aria-label=\"EPDM ve NBR Kelebek Vana Yata\u011f\u0131n\u0131n Tan\u0131t\u0131m\u0131 Hakk\u0131nda Daha Fazla Bilgi\">Daha fazla bilgi edinin<\/a><\/p>","protected":false},"author":2,"featured_media":11718,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","kt_blocks_editor_width":"","footnotes":""},"categories":[1],"tags":[1814,1821,1819,1818,1820,1816,1815,1817,1997,1998,3235],"class_list":["post-11720","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-butterfly-valve-seat","tag-epdm-butterfly-valve","tag-epdm-seat","tag-epdm-valve","tag-epdm-vs-nbr","tag-epdm-vs-nitrile","tag-epdm-vs-ptfe","tag-nbr-vs-epdm","tag-pctfe-valve-seat","tag-pctfe-valve-seat-manufacturer","tag-valve-seat-rings","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"featured_image_src_large":["https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/01\/20220104123610-61d43f3a14ade.webp",495,409,false],"author_info":{"display_name":"Jerry","author_link":"https:\/\/zecovalve.com\/tr\/author\/jerry"},"comment_info":0,"category_info":[{"term_id":1,"name":"Uncategorized","slug":"uncategorized","term_group":0,"term_taxonomy_id":1,"taxonomy":"category","description":"","parent":0,"count":452,"filter":"raw","cat_ID":1,"category_count":452,"category_description":"","cat_name":"Uncategorized","category_nicename":"uncategorized","category_parent":0}],"tag_info":[{"term_id":1814,"name":"butterfly valve seat","slug":"butterfly-valve-seat","term_group":0,"term_taxonomy_id":1814,"taxonomy":"post_tag","description":"","parent":0,"count":2,"filter":"raw"},{"term_id":1821,"name":"epdm butterfly valve","slug":"epdm-butterfly-valve","term_group":0,"term_taxonomy_id":1821,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1819,"name":"epdm seat","slug":"epdm-seat","term_group":0,"term_taxonomy_id":1819,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1818,"name":"epdm valve","slug":"epdm-valve","term_group":0,"term_taxonomy_id":1818,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1820,"name":"epdm vs nbr","slug":"epdm-vs-nbr","term_group":0,"term_taxonomy_id":1820,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1816,"name":"epdm vs nitrile","slug":"epdm-vs-nitrile","term_group":0,"term_taxonomy_id":1816,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1815,"name":"epdm vs ptfe","slug":"epdm-vs-ptfe","term_group":0,"term_taxonomy_id":1815,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1817,"name":"nbr vs epdm","slug":"nbr-vs-epdm","term_group":0,"term_taxonomy_id":1817,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1997,"name":"PCTFE Valve Seat","slug":"pctfe-valve-seat","term_group":0,"term_taxonomy_id":1997,"taxonomy":"post_tag","description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_9e7b7b-8a\"} \/-->\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 PCTFE VALVE SEAT PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-what-is-pctfe-material\">What is PCTFE Material?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE (Polychlorotrifluoroethylene) PCTFE (Polychlorotrifluoroethylene) is a homopolymer of Chlorotrifluoroethylene. PCTFE is a unique fluoropolymer that is capable of maintaining its physical properties at exceptionally low operating temperatures.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE has excellent chemical resistance, radiation resistance, and flammability characteristics. The material has a useful temperature range of -400\u00b0F to 380\u00b0F. PCTFE is resistant to cold flow and it has the lowest coefficient of thermal expansion of any unfilled fluoropolymer. These characteristics make it an excellent choice when dimensional stability is critical.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE is often used for aerospace applications when chemical resistance, a broad operating temperature range, and low flammability are required. It is also extensively used for cryogenic valve applications.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Key Properties of PCTFE Material<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>Dimensionally stable, rigid, and resistant to cold flow<\/li>\r\n \t<li>Very low gas permeation and outgassing<\/li>\r\n \t<li>Near zero moisture absorption<\/li>\r\n \t<li>Excellent chemical resistance<\/li>\r\n \t<li>High compression strength<\/li>\r\n \t<li>Low deformation under load<\/li>\r\n \t<li>Non-flammable<\/li>\r\n \t<li>Temperature range: -400\u00b0 to 380\u00b0F<\/li>\r\n \t<li>Radiation Resistance<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\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>Property<\/td>\r\n<td>Value<\/td>\r\n<td>Units<\/td>\r\n<td>Method<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Tensile Strength<\/td>\r\n<td>4860 - 5710\r\n34 - 39<\/td>\r\n<td>psi\r\nMPa<\/td>\r\n<td>D 638<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Elongation<\/td>\r\n<td>100 - 250<\/td>\r\n<td>%<\/td>\r\n<td>D 638<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Flexural Strength, 73\u00b0F<\/td>\r\n<td>9570 - 10300\r\n66 - 71<\/td>\r\n<td>psi\r\nMPa<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Flex Modulus<\/td>\r\n<td>200 \u2013 243 x 103\r\n1.4 \u2013 1.7<\/td>\r\n<td>psi\r\nMPa<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Impact Strength, Izod, 23 deg C<\/td>\r\n<td>2.5 \u2013 3.5<\/td>\r\n<td>ft-lb\/in<\/td>\r\n<td>D 256<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Compressive Stress at 1% deformation,<\/td>\r\n<td>1570 \u2013 1860\r\n11 - 13<\/td>\r\n<td>psi\r\nMPa<\/td>\r\n<td>D 695<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Density<\/td>\r\n<td>2.10 to 2.17<\/td>\r\n<td>gm\/cu.cm<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Coefficient of Linear Expansion<\/td>\r\n<td>7 x 10-5<\/td>\r\n<td>K-1<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Melting Point<\/td>\r\n<td>410 -414\r\n210 - 212<\/td>\r\n<td>deg F\r\ndeg C<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Thermal Conductivity<\/td>\r\n<td>1.45\r\n0.84<\/td>\r\n<td>Btu\u00b7in\/h\u00b7ft2\u00b7\u00b0F\r\nW\/m\u00b7K<\/td>\r\n<td>ASTM C 177<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Specific Heat<\/td>\r\n<td>0.22\r\n0.92<\/td>\r\n<td>Btu\/lb\/deg F\r\nkJ\/Kg\/deg K<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Heat Distortion Temperature, 66 lb\/sq.in (0.455 MPa)<\/td>\r\n<td>259\r\n126<\/td>\r\n<td>deg F\r\ndeg C<\/td>\r\n<td>D 648<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Processing Temperature<\/td>\r\n<td>620\r\n327<\/td>\r\n<td>deg F\r\ndeg C<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Dielectric Strength, short time, 0.004\u201d<\/td>\r\n<td>3000<\/td>\r\n<td>Volt\/mil<\/td>\r\n<td>D 149<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Arc-Resistance<\/td>\r\n<td>360<\/td>\r\n<td>sec<\/td>\r\n<td>D 495<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Volume Resistivity, @ 50% RH<\/td>\r\n<td>2 x 1017<\/td>\r\n<td>ohm-cm<\/td>\r\n<td>D 257<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Surface Resistivity, @ 100% RH<\/td>\r\n<td>1 x 1015<\/td>\r\n<td>Ohm sq-1<\/td>\r\n<td>D 257<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Dielectric Constant, 1 kHz<\/td>\r\n<td>2.6<\/td>\r\n<td>\u03b5<\/td>\r\n<td>D150-81<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Dissipation Factor, @ 1 kHz<\/td>\r\n<td>0.02<\/td>\r\n<td><\/td>\r\n<td>D150-81<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Water Absorption<\/td>\r\n<td>0.00<\/td>\r\n<td>% increase in weight<\/td>\r\n<td>D570-81<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Flame Rating+<\/td>\r\n<td>Non-flammable<\/td>\r\n<td><\/td>\r\n<td>D 635<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Coefficient of friction<\/td>\r\n<td><\/td>\r\n<td><\/td>\r\n<td>D 1894<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Specific Gravity<\/td>\r\n<td>2.10 to 2.17<\/td>\r\n<td><\/td>\r\n<td>D792<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Moisture Permeability Constant<\/td>\r\n<td>0.2<\/td>\r\n<td>g\/m, 24 hours<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>O2\u00a0Permeability<\/td>\r\n<td>1.5 x 10-10<\/td>\r\n<td>Cc, cm\/sq.cm, sec, atm<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>N2\u00a0Permeability<\/td>\r\n<td>0.18 x 10-10<\/td>\r\n<td>Cc, cm\/sq.cm, sec, atm<\/td>\r\n<td><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>CO2\u00a0Permeability<\/td>\r\n<td>2.9 x 10-10<\/td>\r\n<td>Cc, cm\/sq.cm, sec, atm<\/td>\r\n<td><\/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>PCTFE Valve Seat<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nBall valve seats that show signs of swelling, blistering, or \u201cpopcorning\u201d have been permeated at a molecular level. Needless to say, this can cause some serious issues such as leaks and catastrophic failure. The solution is to find a ball valve seat material that is highly resistant to permeation and an excellent choice would be PCTFE. In this week\u2019s blog post, we will talk about PCTFE Ball Valve Seats and how they are used in Low Permeation Applications.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nOne of the best materials for a ball valve seat application where permeability is a problem would be PCTFE (Polychlorotrifluoroethylene), a thermoplastic chlorofluoropolymer. PCTFE is sometimes referred to as Modified PTFE or PCTFE, as well as by trade names Kel-F, Voltalef, and Neoflon. PCTFE is often thought of as a second-generation PTFE material that maintains the chemical and thermal resistance of PTFE along with its low friction. It is also similar to other fluoropolymers such as PFA or FEP.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nOne of the defining characteristics of PCTFE is that it has a much more dense molecular structure and a low void and micro-porosity content when compared to similar ball valve seat materials. This gives it a very low permeability coefficient, which means that the likelihood of it swelling or popcorning is far lower than other materials. For example, its permeability for O2, N2, CO2, and H2 are 1.5 x 10-10, 0.18 x 10-10, 2.9 x 10-10, and 56.4 x 10-10 darcy, respectively.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE also provides improved toughness and strength along with good deformation recovery and excellent creep and cold-flow resistance. In addition, it has a wide operating temperature range of -100\u00b0F to 500\u00b0F. In fact, it performs extremely well at cryogenic temperatures. Because of its low friction, it also results in a very low ball valve operating torque. PCTFE also exhibits zero moisture absorption and is non-wetting.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE works well in operating environments where other polymers may fail. For example, it is well adapted to nuclear service that may involve high radiation exposure, is non-flammable (D 635), and is resistant to attack by the vast majority of chemicals and oxidizing agents. The only chemicals that might lead to slight swelling are ethers, esters, aromatic solvents, and halocarbon compounds.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":4,"filter":"raw"},{"term_id":1998,"name":"PCTFE Valve Seat Manufacturer","slug":"pctfe-valve-seat-manufacturer","term_group":0,"term_taxonomy_id":1998,"taxonomy":"post_tag","description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_7bd7e9-a7\"} \/-->\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 PCTFE VALVE SEAT PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-what-is-pctfe\">What is PCTFE?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPCTFE(Polychlorotrifluoroethylene) is a fluorocarbon-based polymer. It offers a unique combination of physical and mechanical properties, nonflammability, and low permeation capability to moisture and steam atmosphere compared to other plastics. The heat resistance and chemical resistance capability are less than PFA and FEP, however, mechanical characteristics(especially hardness) are superior. It is suitable for utilizing in the temperature range of -200\u2103\uff5e150\u2103, especially for cryogenic applications such as oxygen, hydrogen, nitrogen, and more. PCTFE has a very strong resistance performance to low temperatures.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Property List of PCTFE<\/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><strong>Item<\/strong><\/td>\r\n<td><strong>Color<\/strong><\/td>\r\n<td><strong>Density<\/strong><\/td>\r\n<td><strong>Hardness<\/strong><\/td>\r\n<td><strong>Compressive strength<\/strong><\/td>\r\n<td><strong>Long-term Temp.<\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Units<\/td>\r\n<td><\/td>\r\n<td>g\/cm3<\/td>\r\n<td>Shore D<\/td>\r\n<td>Mpa<\/td>\r\n<td>\u2103<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Value<\/td>\r\n<td>Translucent<\/td>\r\n<td>2.13<\/td>\r\n<td>75-85<\/td>\r\n<td>80<\/td>\r\n<td>-80~115<\/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><strong><a href=\"https:\/\/zecovalve.com\/product-category\/ball-valve\"><mark class=\"has-inline-color has-contrast-2-color\" style=\"background-color: var(--base)\">Ball Valve<\/mark><\/a><\/strong> Seats<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nSeats and inserts, which are important components in the valve industry, are critical components, PTFE is very often chosen as the raw material. PTFE provides a low-friction seat, with excellent media compatibility. Filled grades provide wear resistance and can support seating loads of the higher class of valves.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2><strong><mark class=\"has-inline-color has-contrast-2-color\" style=\"background-color: var(--base)\"><a href=\"https:\/\/zecovalve.com\/product-category\/butterfly-valve\">Butterfly Valve<\/a><\/mark><\/strong> Seats<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPTFE is one of the Butterfly Valve Seat Materials. PTFE Butterfly Valve Seats Are Available in Pure or Reinforced PTFE to Meet Specific Requirements for Different Working Environments.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPTFE Seats' Excellent Chemical Resistance, High-Temperature Resistance, Self-lubrication, and Low Friction Properties of PTFE Make It a General Material for Valve Seats.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>VALVE SEAT MATERIAL SELECTION<\/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<thead>\r\n<tr>\r\n<th class=\"has-text-align-center\" data-align=\"center\">Material Name<\/th>\r\n<th>Main Properties<\/th>\r\n<th>Notes<\/th>\r\n<th>Temperature Range<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">VIRGIN PTFE<\/td>\r\n<td>Very low coefficient of friction and excellent chemical resistance.<\/td>\r\n<td>FDA approved<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">15% Glass Filled PTFE<\/td>\r\n<td>Decreased compressive strength and lower deformation under load than virgin PTFE.<\/td>\r\n<td>Abrasive material<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">25% Glass Filled PTFE<\/td>\r\n<td>Similar to 15% Glass better wear resistance, higher compressive strength, and lower deformation under load.<\/td>\r\n<td>Abrasive material<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Stainless Steel Filled PTFE<\/td>\r\n<td>Extremely hard-wearing. Excellent strength and stability under extreme loads and elevated temperatures.<\/td>\r\n<td>Can be used in steam and thermal fluid applications<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">TFM<\/td>\r\n<td>Much denser polymer structure than Virgin PTFE. Displays better stress recovery.<\/td>\r\n<td>Modified TFE Polymer<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Carbon Graphite filled TFM<\/td>\r\n<td>Lower thermal expansion-contraction rate than conventional TFM.<\/td>\r\n<td>Ideal for use in steam and thermal fluid applications<\/td>\r\n<td>-40\u00b0C to 260\u00b0C and even 320\u00b0C on Thermal Fluid applications<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">UHMWPE<\/td>\r\n<td>Highly resistant to corrosive chemicals, with the exception of oxidizing acids and organic solvents.<\/td>\r\n<td>Also known as High Modulus Polyethylene (HMPE) or High-Performance Polyethylene (HPPE)<\/td>\r\n<td>-40\u00b0C to +80\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">PCTFE<\/td>\r\n<td>Excellent for cryogenic and Oxygen use.<\/td>\r\n<td>A homo-polymer of Chlorotrifluoroethylene<\/td>\r\n<td>-270\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Virgin PEEK 450G<\/td>\r\n<td>Excellent chemical resistance and mechanical properties at elevated temperatures.<\/td>\r\n<td>An organic polymer thermoplastic<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Carbon Filled PEEK<\/td>\r\n<td>Many similar properties to Virgin PEEK. Particularly suitable for elevated temperatures and high-load situations.<\/td>\r\n<td>Low coefficient of friction and suitable for many extremely corrosive applications<\/td>\r\n<td>-40\u00b0C to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">PEEK HT<\/td>\r\n<td>Retains all key features and benefits of PEEK 450G but retains physical properties to a higher temperature.<\/td>\r\n<td>Can be supplied in both virgins unfilled or as-filled compounded material<\/td>\r\n<td>up to 260\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td class=\"has-text-align-center\" data-align=\"center\">Acetal and Delrin<\/td>\r\n<td>Displays good resistance to wear and deformation under load.<\/td>\r\n<td>Excellent for valve seat applications<\/td>\r\n<td>up to 80\u00b0C<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n<!-- \/wp:table -->","parent":0,"count":5,"filter":"raw"},{"term_id":3235,"name":"Valve Seat Rings","slug":"valve-seat-rings","term_group":0,"term_taxonomy_id":3235,"taxonomy":"post_tag","description":"<!-- wp:paragraph -->\r\n\r\nThe 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\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>GET VALVE SEAT RINGS PRICE<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nFor the butterfly valve, the seat material usually are rubbers, such as EPDM, NBR, NR (Natural hard rubber)\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nFor the ball valve and plug valve the seat material usually is plastics, such as PTFE, PEEK, and so on.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nFor the globe valve and gate valve the seat material usually is metal to metal.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nFor 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.\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 of Seat Rings<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Soft Seat (Nonmetallic Seat Ring)<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe 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.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Double Beveled Sealing Ring<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe 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.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Cantilevered lips seat rings<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nSeat 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\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Pressure equalizing slots<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe 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.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Soft Seat (Metallic Seat Ring)<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe 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.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Metal to Metal Seats<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nFor 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.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":5,"filter":"raw"}],"taxonomy_info":{"category":[{"value":1,"label":"Uncategorized"}],"post_tag":[{"value":1814,"label":"butterfly valve seat"},{"value":1821,"label":"epdm butterfly valve"},{"value":1819,"label":"epdm seat"},{"value":1818,"label":"epdm valve"},{"value":1820,"label":"epdm vs nbr"},{"value":1816,"label":"epdm vs nitrile"},{"value":1815,"label":"epdm vs ptfe"},{"value":1817,"label":"nbr vs epdm"},{"value":1997,"label":"PCTFE Valve Seat"},{"value":1998,"label":"PCTFE Valve Seat Manufacturer"},{"value":3235,"label":"Valve Seat Rings"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Introduction Of EPDM &amp; NBR Butterfly Valve Seat - 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\/tr\/introduction-of-epdm-nbr-butterfly-valve-seat-industrial-valve-information-news-zeco-valve.html\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Introduction Of EPDM &amp; NBR Butterfly Valve Seat - Zeco Valve\" \/>\n<meta property=\"og:description\" content=\"ZECO butterfly valves are usually classified as butterfly CI, butterfly WCB, butterfly bronze, and butterfly stainless steel. 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