{"id":12761,"date":"2022-01-05T07:43:53","date_gmt":"2022-01-05T07:43:53","guid":{"rendered":"https:\/\/zecovalve.com\/what-is-valve-seat-and-seat-rings-how-many-different-materials-do-they-have-zeco-valve-industrial-valve-manufacturer.html"},"modified":"2022-10-13T13:48:12","modified_gmt":"2022-10-13T13:48:12","slug":"what-is-valve-seat-and-seat-rings-how-many-different-materials-do-they-have-zeco-valve-industrial-valve-manufacturer","status":"publish","type":"post","link":"https:\/\/zecovalve.com\/pt\/what-is-valve-seat-and-seat-rings-how-many-different-materials-do-they-have-zeco-valve-industrial-valve-manufacturer.html","title":{"rendered":"Tabela de compatibilidade de material de sede de v\u00e1lvula"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"h-what-is-valve-seat\">O que \u00e9 sede de v\u00e1lvula?<\/h2>\n\n\n\n<p>A sede ou anel da sede da v\u00e1lvula \u00e9 usado para apoiar o obturador ou disco da v\u00e1lvula em uma posi\u00e7\u00e3o totalmente fechada e para formar uma pe\u00e7a de veda\u00e7\u00e3o. Normalmente, o di\u00e2metro da sede da v\u00e1lvula \u00e9 o di\u00e2metro m\u00e1ximo de fluxo da v\u00e1lvula. O material da sede \u00e9 muito amplo, todos os tipos de materiais de borracha, pl\u00e1stico e metal podem ser usados como material da sede, como EPDM, NBR, NR, PTF.E, PEEK, PFA, SS315, STELLITE e assim por diante<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/01\/20220105074352-61d54c386d0e8.png\" alt=\"\"\/><figcaption>Assento de v\u00e1lvula de borracha<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/01\/20220105074352-61d54c3885bbd.jpg\" alt=\"\"\/><figcaption>Assento de v\u00e1lvula PTFE\u00a0<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/01\/20220105074352-61d54c388b5db.jpg\" alt=\"\"\/><figcaption>Assento de v\u00e1lvula met\u00e1lica<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<p>Para v\u00e1lvula borboleta o material da sede geralmente s\u00e3o borrachas, como EPDM, NBR, NR (borracha dura natural)<\/p>\n\n\n\n<p>Para v\u00e1lvulas esf\u00e9ricas e v\u00e1lvulas macho, o material da sede geralmente \u00e9 pl\u00e1stico, como PTFE, PEEK e assim por diante.&nbsp;&nbsp;<\/p>\n\n\n\n<p>Para v\u00e1lvula globo e v\u00e1lvula gaveta, o material da sede geralmente \u00e9 metal com metal.&nbsp;<\/p>\n\n\n\n<p>Para v\u00e1lvulas que usam material de sede macio, seu desempenho de fechamento \u00e9 excelente e pode at\u00e9 atingir zero veda\u00e7\u00e3o de bolha na sede. enquanto a desvantagem \u00e9 que eles n\u00e3o podem resistir \u00e0 aplica\u00e7\u00e3o de alta temperatura e alta press\u00e3o.&nbsp;<\/p>\n\n\n\n<p>Por outro lado, para essas v\u00e1lvulas, o material da sede \u00e9 metal com metal, portanto, elas podem suportar alta press\u00e3o de at\u00e9 2500LB.&nbsp;&nbsp;<\/p>\n\n\n\n<p><strong>Fatores importantes que afetam o desempenho de fechamento de uma v\u00e1lvula podem ser a natureza do meio que est\u00e1 sendo manuseado. <\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A vida \u00fatil das v\u00e1lvulas \u00e9 afetada por todos os seguintes fatores<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Press\u00e3o e flutua\u00e7\u00f5es de press\u00e3o<\/li><li>Tipo e velocidade da m\u00eddia<\/li><li>Temperatura e flutua\u00e7\u00f5es de temperatura<\/li><li>Frequ\u00eancia de ciclagem de v\u00e1lvula e velocidade de opera\u00e7\u00e3o<\/li><li>Os materiais de veda\u00e7\u00f5es e sedes de v\u00e1lvulas industriais s\u00e3o geralmente fabricados usando os seguintes materiais:<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Tabela de compatibilidade de material de sede de v\u00e1lvula<\/h2>\n\n\n\n<p><strong>BUNA-N (HYCAR ou Nitrila<\/strong>)<\/p>\n\n\n\n<p>Buna-N \u00e9 um pol\u00edmero de uso geral que possui boa resist\u00eancia a \u00f3leo, \u00e1gua, solventes e fluidos hidr\u00e1ulicos. Ele tamb\u00e9m apresenta boa compress\u00e3o, resist\u00eancia \u00e0 abras\u00e3o e resist\u00eancia \u00e0 tra\u00e7\u00e3o. Este material funciona extremamente bem em \u00e1reas de processo onde est\u00e3o presentes materiais \u00e0 base de parafina, \u00e1cidos graxos, \u00f3leos, \u00e1lcoois ou glicerina, uma vez que \u00e9 totalmente inalterado.<\/p>\n\n\n\n<p>Buna-N n\u00e3o deve ser usado perto de solventes de alta polaridade (acetonas, cetonas), hidrocarbonetos clorados, oz\u00f4nio ou nitro hidrocarbonetos. A faixa de temperatura \u00e9 de no m\u00e1ximo 107\u00b0C. Hycar \u00e9 de cor preta e n\u00e3o deve ser usado onde a descolora\u00e7\u00e3o n\u00e3o puder ser tolerada. \u00c9 considerado um neoprene de substitui\u00e7\u00e3o compar\u00e1vel. As principais diferen\u00e7as s\u00e3o: Buna-N tem um limite de temperatura mais elevado; o neoprene \u00e9 mais resistente aos \u00f3leos.<\/p>\n\n\n\n<p><strong>TFE CHEIO DE CARBONO<\/strong><\/p>\n\n\n\n<p>O TFE preenchido com carbono \u00e9 um excelente material de sede para aplica\u00e7\u00f5es de vapor, bem como para fluidos t\u00e9rmicos \u00e0 base de \u00f3leo de alta efici\u00eancia. Os enchimentos incluindo grafite permitem que este material de sede tenha um ciclo de vida melhor do que outros assentos TFE preenchidos ou refor\u00e7ados. A faixa de temperatura \u00e9 de -29\u00b0C a 260\u00b0C. A resist\u00eancia qu\u00edmica \u00e9 igual a outras sedes TFE.<\/p>\n\n\n\n<p><strong>DELRIN\u00ae<\/strong><\/p>\n\n\n\n<p>Delrin \u00e9 marca registrada da DuPont para Polioximetileno. Tamb\u00e9m pode ser conhecido como Hostaform, Celecon, Kepital, Duracon, Lupital ou Ultraform. Delrin \u00e9 um material muito r\u00edgido e n\u00e3o sofre escoamento a frio. Possui uma excelente combina\u00e7\u00e3o de resist\u00eancia, dureza, rigidez, estabilidade, resist\u00eancia \u00e0 abras\u00e3o e baixo atrito. Delrin possui alta resist\u00eancia ao calor e baixa absor\u00e7\u00e3o de \u00e1gua, mas \u00e9 suscet\u00edvel a \u00e1cidos. Quando usado como material de veda\u00e7\u00e3o, Delrin \u00e9 aceit\u00e1vel para press\u00f5es de at\u00e9 5.000 PSI. Seu envelope de temperatura operacional \u00e9 de -70 \u00baF a 180 \u00baF.<\/p>\n\n\n\n<p><strong>EPDM<\/strong><\/p>\n\n\n\n<p>EPDM \u00e9 um elast\u00f4mero terpol\u00edmero feito de mon\u00f4mero de etileno-propileno dieno. O EPDM possui boa resist\u00eancia \u00e0 abras\u00e3o e ao rasgo e oferece excelente resist\u00eancia qu\u00edmica a uma variedade de \u00e1cidos e alcalinos. \u00c9 suscet\u00edvel a ataques de \u00f3leos e n\u00e3o \u00e9 recomendado para aplica\u00e7\u00f5es que envolvam \u00f3leos de petr\u00f3leo, \u00e1cidos fortes ou alcalinos fortes.<\/p>\n\n\n\n<p>Este material n\u00e3o deve ser utilizado em linhas de ar comprimido. Possui envelhecimento excepcionalmente bom em condi\u00e7\u00f5es clim\u00e1ticas e resist\u00eancia ao oz\u00f4nio. A classifica\u00e7\u00e3o de temperatura \u00e9 de -29\u00b0C a 107\u00b0C (servi\u00e7o intermitente de 121\u00b0C). \u00c9 bastante bom para cetonas e \u00e1lcoois.<\/p>\n\n\n\n<p><strong>HYPALON\u00ae<\/strong><\/p>\n\n\n\n<p>Hypalon possui muito boa resist\u00eancia \u00e0 oxida\u00e7\u00e3o, ao oz\u00f4nio e boa resist\u00eancia \u00e0 chama. \u00c9 semelhante ao neoprene, exceto pela resist\u00eancia aprimorada aos \u00e1cidos, onde resistir\u00e1 a \u00e1cidos oxidantes como \u00e1cido n\u00edtrico, fluor\u00eddrico e sulf\u00farico. A resist\u00eancia \u00e0 abras\u00e3o do Hypalon \u00e9 excelente, quase equivalente \u00e0 dos nitrilos. A resist\u00eancia ao \u00f3leo e aos solventes est\u00e1 um pouco entre a do neoprene e dos nitrilos. Os sais t\u00eam pouco ou nenhum efeito sobre o Hypalon.<\/p>\n\n\n\n<p>Hypalon n\u00e3o \u00e9 recomendado para exposi\u00e7\u00e3o a \u00e1cidos oxidantes concentrados, \u00e9steres, cetonas, hidrocarbonetos clorados, arom\u00e1ticos e nitro. N\u00e3o deve ser usado em servi\u00e7o de vapor. A classifica\u00e7\u00e3o de temperatura \u00e9 de -18\u00b0C a 104\u00b0C. Os assentos s\u00e3o brancos de qualidade alimentar e podem ser usados em alimentos<\/p>\n\n\n\n<p><strong>NEOPRENE<\/strong><\/p>\n\n\n\n<p>O neoprene \u00e9 um pol\u00edmero multifuncional com muitas caracter\u00edsticas desej\u00e1veis. O neoprene apresenta alta resili\u00eancia com baixa resist\u00eancia \u00e0 chama de compress\u00e3o e resist\u00eancia a \u00f3leos animais e vegetais. \u00c9 recomendado principalmente para uso em aplica\u00e7\u00f5es de celulose e papel.<\/p>\n\n\n\n<p>Geralmente, o neoprene n\u00e3o \u00e9 recomendado e \u00e9 atacado por \u00e1cidos oxidantes fortes, a maioria dos solventes clorados, \u00e9steres, cetonas, hidrocarbonetos arom\u00e1ticos e fluidos hidr\u00e1ulicos. O neoprene geralmente n\u00e3o \u00e9 afetado por produtos qu\u00edmicos moderados, gorduras, graxas e muitos \u00f3leos e solventes. A classifica\u00e7\u00e3o de temperatura \u00e9 de -29\u00b0C a 82\u00b0C. Os assentos s\u00e3o pretos e n\u00e3o devem ser usados em linhas de papel branqueado.<\/p>\n\n\n\n<p><strong>PEEK (polieteretercetona)<\/strong><\/p>\n\n\n\n<p>PEEK \u00e9 um termopl\u00e1stico semirr\u00edgido n\u00e3o poroso de alto desempenho com excelente resist\u00eancia a produtos qu\u00edmicos agressivos. Virgin PEEK \u00e9 naturalmente resistente \u00e0 abras\u00e3o. Possui excelente resist\u00eancia mec\u00e2nica, estabilidade dimensional e \u00e9 adequado para uso em ambientes de alta temperatura\/alta corros\u00e3o. O PEEK \u00e9 considerado um material premium para sede de v\u00e1lvula devido ao fato de n\u00e3o ser afetado pela exposi\u00e7\u00e3o cont\u00ednua a \u00e1gua quente e vapor. Seu envelope de temperatura operacional \u00e9 de -70 \u00baF a 600 \u00baF.<\/p>\n\n\n\n<p><strong>PTFE (TFE de Te\ufb02on\u00ae)<\/strong><\/p>\n\n\n\n<p>O PTFE \u00e9 o mais resistente quimicamente de todos os pl\u00e1sticos. Tamb\u00e9m possui excelentes propriedades de isolamento t\u00e9rmico e el\u00e9trico. As propriedades mec\u00e2nicas do PTFE s\u00e3o baixas em compara\u00e7\u00e3o com outros pl\u00e1sticos de engenharia, mas suas propriedades permanecem em n\u00edveis \u00fateis em uma grande faixa de temperatura -40\u00b0C a 204\u00b0C, dependendo da marca e da aplica\u00e7\u00e3o.<\/p>\n\n\n\n<p><strong>RTFE (TFE Refor\u00e7ado)<\/strong><\/p>\n\n\n\n<p>O RTFE \u00e9 composto por uma porcentagem selecionada de enchimento de fibra de vidro para melhorar a resist\u00eancia e a resist\u00eancia ao desgaste abrasivo, fluxo a frio e permea\u00e7\u00e3o em sedes moldadas. O refor\u00e7o permite a aplica\u00e7\u00e3o em press\u00f5es e temperaturas mais altas do que o TFE n\u00e3o preenchido. A faixa de temperatura t\u00edpica \u00e9 de -40\u00b0C a 232\u00b0C. O RTFE n\u00e3o deve ser usado em aplica\u00e7\u00f5es que atacam o vidro, como \u00e1cido fluor\u00eddrico e produtos c\u00e1usticos fortes e quentes.<\/p>\n\n\n\n<p><strong>TFM1600<\/strong><\/p>\n\n\n\n<p>O TFM1600 aparece em nossa lista de veda\u00e7\u00f5es e sedes de v\u00e1lvula porque \u00e9 uma vers\u00e3o modificada do PTFE que mant\u00e9m as excepcionais propriedades qu\u00edmicas e de resist\u00eancia ao calor do PTFE, mas possui uma viscosidade de fus\u00e3o significativamente menor. O resultado \u00e9 a redu\u00e7\u00e3o do fluxo a frio, da porosidade, da permeabilidade e do conte\u00fado de vazios. As superf\u00edcies s\u00e3o mais lisas e reduzem os torques. A faixa de servi\u00e7o te\u00f3rica para o TFM1600 \u00e9 de -200\u00b0C a 260\u00b0C.<\/p>\n\n\n\n<p><strong>TFM1600+20%GF<\/strong><\/p>\n\n\n\n<p>TFM1600+20%GF \u00e9 uma vers\u00e3o refor\u00e7ada com fibra de vidro do TFM1600. Semelhante ao RTFE, mas com o benef\u00edcio do TFM1600, a vers\u00e3o com enchimento de vidro oferece maior resist\u00eancia \u00e0 abras\u00e3o e melhora a estabilidade em press\u00f5es mais altas.<\/p>\n\n\n\n<p><strong>TFM4215<\/strong><\/p>\n\n\n\n<p>TFM4215 \u00e9 um material TFM preenchido com carbono grafitado. O carbono adicionado melhora a estabilidade para combina\u00e7\u00f5es de press\u00e3o e temperatura mais altas.<\/p>\n\n\n\n<p><strong>UHMWPE (polietileno de ultra-alto peso molecular)<\/strong><\/p>\n\n\n\n<p>UHMWPE \u00e9 um material dur\u00e1vel, de longa dura\u00e7\u00e3o e resistente \u00e0 abras\u00e3o\/corros\u00e3o. Tamb\u00e9m \u00e9 conhecido como Polietileno de Alto M\u00f3dulo (HMPE) ou Polietileno de Alto Desempenho (HPPE). Al\u00e9m disso, ele atende \u00e0 aceita\u00e7\u00e3o da FDA e do USDA para equipamentos aliment\u00edcios e farmac\u00eauticos e tem bom desempenho em aplica\u00e7\u00f5es de at\u00e9 180\u00b0F quando limpo periodicamente com vapor vivo ou \u00e1gua fervente para esterilizar.<\/p>\n\n\n\n<p>O UHMWPE \u00e9 ideal para servi\u00e7os de baixa radia\u00e7\u00e3o e atende aos requisitos da ind\u00fastria do tabaco onde o TFE \u00e9 proibido. \u00c9 altamente resistente a produtos qu\u00edmicos corrosivos, com exce\u00e7\u00e3o de \u00e1cidos oxidantes e solventes org\u00e2nicos. Seu envelope de temperatura operacional \u00e9 de -70 \u00baF a 180 \u00baF.<\/p>\n\n\n\n<p><strong>VITON\u00ae (Fluorcarbono, FKM ou FPM)<\/strong><\/p>\n\n\n\n<p>Os elast\u00f4meros de fluorocarbono s\u00e3o inerentemente compat\u00edveis com um amplo espectro de produtos qu\u00edmicos. Devido a esta extensa compatibilidade qu\u00edmica que abrange faixas consider\u00e1veis de concentra\u00e7\u00e3o e temperatura, os elast\u00f4meros de fluorocarbono ganharam ampla aceita\u00e7\u00e3o como material de constru\u00e7\u00e3o para sedes de v\u00e1lvulas de guilhotina.<\/p>\n\n\n\n<p>O fluorocarbono pode ser usado na maioria das aplica\u00e7\u00f5es que envolvem \u00e1cidos minerais, solu\u00e7\u00f5es salinas, hidrocarbonetos clorados e \u00f3leos de petr\u00f3leo. \u00c9 particularmente bom em servi\u00e7os de hidrocarbonetos. A classifica\u00e7\u00e3o de temperatura \u00e9 de -29\u00b0C a 149\u00b0C. A cor \u00e9 cinza, preta ou vermelha e pode ser usada em linhas de papel branqueado.<\/p>\n\n\n\n<p>VITON n\u00e3o \u00e9 adequado para servi\u00e7os de vapor ou \u00e1gua quente, por\u00e9m, na forma de O-ring, pode ser aceit\u00e1vel para linhas de hidrocarbonetos misturadas com \u00e1gua quente dependendo do tipo\/marca. Para materiais de assento, o FKM pode oferecer mais resist\u00eancia \u00e0 \u00e1gua quente.<\/p>\n\n\n\n<!-- Andy:h-related-tags -->\n<h2 id=\"h-related-tags\">Etiquetas relacionadas :<\/h2>\n<!-- \/Andy:h-related-tags -->\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/\">V\u00e1lvula ZECO<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/thermoplastic-materials-as-valve-seat.html\/\">Materiais termopl\u00e1sticos como sede de v\u00e1lvula esf\u00e9rica e sede de v\u00e1lvula borboleta<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/introduction-of-epdm-nbr-butterfly-valve-seat-industrial-valve-information-news-zeco-valve.html\/\">V\u00e1lvula borboleta NBR<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/produto\/12-inch-gate-valve\/\">Fornecedor de v\u00e1lvula gaveta de 12 polegadas<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/tag\/shanghai-pressure-reducing-valve-factory\/\">F\u00e1brica de v\u00e1lvulas redutoras de press\u00e3o de Xangai<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/china-gate-valves-suppliersnon-rising-stem-gate-valvesks-gate-valves.html\/\">O que \u00e9 uma v\u00e1lvula de gaveta?<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/produto\/manual-gate-valve\/\">V\u00e1lvula de gaveta de acionamento manual Fabricante<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/the-function-of-globe-valve-in-pipeline-system.html\/\">O que s\u00e3o v\u00e1lvulas globo?<\/a>\n\n<\/div>\n\n\n\n<p>Dez artigos antes e depois<\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/nigerian-president-appealed-to-increasing-gas-supply-zeco-valve-api-approved-valve-manufacturer.html\/\">Presidente da Nig\u00e9ria apelou ao aumento do fornecimento de g\u00e1s \u2013 V\u00e1lvula Zeco | Fabricante de v\u00e1lvula aprovada pela API<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/oil-demands-decline-indicates-global-economic-growth-slow-zeco-valve-api-approved-valve-manufacturer.html\/\">Queda na demanda por petr\u00f3leo indica desacelera\u00e7\u00e3o do crescimento econ\u00f4mico global \u2013 V\u00e1lvula Zeco | Fabricante de v\u00e1lvula aprovada pela API<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/safety-valve-prv-versus-relief-valve-psv-what-is-the-difference-zeco-valve-industrial-valve-manufacturer.html\/\">V\u00e1lvula de seguran\u00e7a (PRV) versus. V\u00e1lvula de al\u00edvio (PSV): Qual a diferen\u00e7a? \u2013 V\u00e1lvula Zeco | Fabricante de v\u00e1lvulas industriais<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/deal-between-rosneft-and-vitol-fizzled-out-zeco-valve-api-approved-valve-manufacturer.html\/\">Acordo entre Rosneft e Vitol fracassou \u2013 Zeco Valve | Fabricante de v\u00e1lvula aprovada pela API<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/export-excellent-quality-of-pneumatic-actuators-to-sa-south-africa-zeco-valve-industrial-valve-manufacturer.html\/\">exportar atuadores pneum\u00e1ticos de excelente qualidade para a \u00c1frica do Sul \u2013 V\u00e1lvula Zeco | Fabricante de v\u00e1lvulas industriais<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/whats-the-difference-between-api-and-asme-standard-zeco-valve-industrial-valve-manufacturer.html\/\">Qual \u00e9 a diferen\u00e7a entre API e padr\u00e3o ASME? \u2013 V\u00e1lvula Zeco | Fabricante de v\u00e1lvulas industriais<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/russian-oil-export-to-asia-reaching-a-new-high-level-zeco-valve-api-approved-valve-manufacturer.html\/\">Exporta\u00e7\u00e3o de petr\u00f3leo russo para a \u00c1sia atinge um novo n\u00edvel elevado \u2013 V\u00e1lvula Zeco | Fabricante de v\u00e1lvula aprovada pela API<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/api-6d-ball-valve-vs-api-608-ball-valve-how-are-they-different-zeco-valve-industrial-valve-manufacturer.html\/\">V\u00e1lvula de esfera API 6D VS V\u00e1lvula de esfera API 608, como elas s\u00e3o diferentes? \u2013 V\u00e1lvula Zeco | Fabricante de v\u00e1lvulas industriais<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/south-stream-gas-pipe-will-not-be-abolished-zeco-valve-api-approved-valve-manufacturer.html\/\">A tubula\u00e7\u00e3o de g\u00e1s South Stream n\u00e3o ser\u00e1 abolida \u2013 V\u00e1lvula Zeco | Fabricante de v\u00e1lvula aprovada pela API<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/how-a-control-valve-positioner-works-zeco-valve-industrial-valve-manufacturer.html\/\">Como funciona um posicionador de v\u00e1lvula de controle \u2013 V\u00e1lvula Zeco | Fabricante de v\u00e1lvulas industriais<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>O que \u00e9 sede de v\u00e1lvula? A sede da v\u00e1lvula ou anel da sede \u00e9 usada para apoiar o obturador ou disco da v\u00e1lvula de forma totalmente\u2026 <a title=\"Tabela de compatibilidade de material de sede de v\u00e1lvula\" class=\"read-more\" href=\"https:\/\/zecovalve.com\/pt\/what-is-valve-seat-and-seat-rings-how-many-different-materials-do-they-have-zeco-valve-industrial-valve-manufacturer.html\" aria-label=\"Mais em Tabela de compatibilidade de materiais de sede de v\u00e1lvula\">Ler mais<\/a><\/p>","protected":false},"author":2,"featured_media":12756,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","kt_blocks_editor_width":"","footnotes":""},"categories":[1],"tags":[3236,1998,3234,3235],"class_list":["post-12761","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-butterfly-valve-seat-material","tag-pctfe-valve-seat-manufacturer","tag-valve-seat-material-compatibility-chart","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\/20220105074352-61d54c386d0e8.png",318,306,false],"author_info":{"display_name":"Jerry","author_link":"https:\/\/zecovalve.com\/pt\/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":3236,"name":"butterfly valve seat material","slug":"butterfly-valve-seat-material","term_group":0,"term_taxonomy_id":3236,"taxonomy":"post_tag","description":"","parent":0,"count":1,"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":3234,"name":"valve seat material compatibility chart","slug":"valve-seat-material-compatibility-chart","term_group":0,"term_taxonomy_id":3234,"taxonomy":"post_tag","description":"","parent":0,"count":1,"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":3236,"label":"butterfly valve seat material"},{"value":1998,"label":"PCTFE Valve Seat Manufacturer"},{"value":3234,"label":"valve seat material compatibility chart"},{"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>Valve Seat Material Compatibility Chart - Valve Seat Rings | 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\/pt\/what-is-valve-seat-and-seat-rings-how-many-different-materials-do-they-have-zeco-valve-industrial-valve-manufacturer.html\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Valve Seat Material Compatibility Chart - Valve Seat Rings | ZECO Valve\" \/>\n<meta property=\"og:description\" content=\"What is Valve Seat? 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