{"id":3386,"date":"2025-04-18T11:07:03","date_gmt":"2025-04-18T03:07:03","guid":{"rendered":"https:\/\/onerovalve.com\/?p=3386"},"modified":"2025-04-24T17:05:18","modified_gmt":"2025-04-24T09:05:18","slug":"ball-valve-specifications","status":"publish","type":"post","link":"https:\/\/www.onerovalve.com\/pt\/blog\/ball-valve-specifications\/","title":{"rendered":"Como ler as especifica\u00e7\u00f5es da v\u00e1lvula de esfera (NPS, DN, classifica\u00e7\u00f5es de classe)"},"content":{"rendered":"<p class=\"wp-block-paragraph\">As marca\u00e7\u00f5es das v\u00e1lvulas de esfera fornecem informa\u00e7\u00f5es essenciais sobre tamanho, capacidade de press\u00e3o e aplica\u00e7\u00f5es adequadas. No entanto, podem parecer um idioma estrangeiro para quem n\u00e3o conhece a terminologia do setor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Este guia ajudar\u00e1 voc\u00ea a decodificar especifica\u00e7\u00f5es comuns de v\u00e1lvulas de esfera, incluindo tamanho nominal do tubo (NPS), di\u00e2metro nominal (DN) e v\u00e1rias classifica\u00e7\u00f5es de classe de press\u00e3o, como CWP e WOG, que aparecem nos corpos das v\u00e1lvulas e na documenta\u00e7\u00e3o.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Designa\u00e7\u00f5es de tamanho de v\u00e1lvula de esfera: NPS e DN<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As v\u00e1lvulas de esfera normalmente usam dois sistemas principais de dimensionamento, dependendo se seguem padr\u00f5es americanos ou internacionais:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>NPS (Tamanho Nominal do Tubo)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">NPS \u00e9 o padr\u00e3o americano para designar o di\u00e2metro de tubos. Apesar de ser expressa em polegadas (por exemplo, 2\u2033), essa medida n\u00e3o corresponde diretamente ao di\u00e2metro interno ou externo real do tubo. Em vez disso, refere-se a um tamanho nominal padronizado.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por exemplo, uma v\u00e1lvula de esfera NPS de 2\u2033 se conecta a tubos com aproximadamente 2,375\u2033 de di\u00e2metro externo, enquanto o di\u00e2metro interno varia de acordo com a programa\u00e7\u00e3o do tubo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>DN (Di\u00e2metro Nominal)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DN \u00e9 a designa\u00e7\u00e3o m\u00e9trica internacional para o tamanho de tubos, expressa em mil\u00edmetros. Assim como o NPS, esses n\u00fameros representam dimens\u00f5es nominais e n\u00e3o reais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por exemplo, DN50 corresponde aproximadamente a 2&quot; NPS. Ao selecionar v\u00e1lvulas para aplica\u00e7\u00f5es internacionais, entender o equivalente em DN garante o dimensionamento correto.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para obter informa\u00e7\u00f5es detalhadas sobre considera\u00e7\u00f5es de dimensionamento, consulte nosso guia sobre <a href=\"https:\/\/www.onerovalve.com\/pt\/blog\/design\/industrial-ball-valve-dimensions-choosing-the-right-size\/\" target=\"_blank\" rel=\"noreferrer noopener\">dimens\u00f5es da v\u00e1lvula de esfera industrial<\/a> fornece informa\u00e7\u00f5es abrangentes sobre como selecionar o tamanho correto da v\u00e1lvula para sua aplica\u00e7\u00e3o.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Compreendendo as classifica\u00e7\u00f5es de press\u00e3o da v\u00e1lvula de esfera<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXfRRSIIH2UAzrTPhKbZFIyJ1Rgz41Zx1WeW81kd_Y3ifSPJysv1fq5dG3qjO4yl_jXeB-OtsQSRnu90A-gn63rhmJTE57gvD_wW2K_6xIXcbMZaMmaAx5rVLXVzi-CwbRoWaqui?key=wsHVqQPDBS1QhPDPuKTehyfV\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">As classifica\u00e7\u00f5es de press\u00e3o indicam a press\u00e3o m\u00e1xima que uma v\u00e1lvula pode suportar com seguran\u00e7a em temperaturas espec\u00edficas. Aqui est\u00e3o as classifica\u00e7\u00f5es mais comuns que voc\u00ea encontrar\u00e1:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>O que significa CWP?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">CWP significa Press\u00e3o de Trabalho a Frio, indicando a press\u00e3o m\u00e1xima que uma v\u00e1lvula pode suportar em temperaturas ambientes (tipicamente 38 \u00b0C ou 100 \u00b0F). Esta classifica\u00e7\u00e3o pressup\u00f5e que a v\u00e1lvula esteja operando em \u00e1gua fria, \u00f3leo ou g\u00e1s sem choque.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por exemplo, uma v\u00e1lvula de esfera marcada como \u201cCWP 800\u201d pode operar com seguran\u00e7a em press\u00f5es de at\u00e9 800 PSI em temperatura ambiente.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>O que significa WOG em uma v\u00e1lvula?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">WOG significa \u00c1gua, \u00d3leo e G\u00e1s, indicando que a v\u00e1lvula \u00e9 adequada para esses tr\u00eas tipos de fluidos. A classifica\u00e7\u00e3o WOG especifica a press\u00e3o m\u00e1xima que a v\u00e1lvula pode suportar ao trabalhar com esses fluidos em temperatura ambiente.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por exemplo, uma v\u00e1lvula de esfera \u201c600 WOG\u201d pode suportar press\u00f5es de at\u00e9 600 PSI ao manusear \u00e1gua, \u00f3leo ou g\u00e1s em temperaturas normais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As v\u00e1lvulas de esfera WOG s\u00e3o op\u00e7\u00f5es vers\u00e1teis para diversas aplica\u00e7\u00f5es industriais devido \u00e0 sua compatibilidade com diversos meios. No entanto, sempre verifique se o meio espec\u00edfico do seu sistema \u00e9 compat\u00edvel com os materiais da v\u00e1lvula.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Classifica\u00e7\u00f5es de classe explicadas<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As classifica\u00e7\u00f5es de classe ANSI\/ASME fornecem uma rela\u00e7\u00e3o padronizada de press\u00e3o-temperatura para v\u00e1lvulas:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Classe 150<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A classifica\u00e7\u00e3o mais comum para aplica\u00e7\u00f5es industriais padr\u00e3o, as v\u00e1lvulas Classe 150 normalmente suportam press\u00f5es de at\u00e9 285 PSI em temperaturas ambientes, com classifica\u00e7\u00f5es decrescentes em temperaturas mais altas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Classe 300<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Para aplica\u00e7\u00f5es de m\u00e9dia press\u00e3o, as v\u00e1lvulas Classe 300 suportam at\u00e9 740 PSI em temperaturas ambientes. S\u00e3o comuns em ambientes industriais mais exigentes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Classe 600 e superior<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Essas classifica\u00e7\u00f5es de alta press\u00e3o s\u00e3o usadas em aplica\u00e7\u00f5es especializadas onde as press\u00f5es do sistema excedem aquelas manipuladas pelas v\u00e1lvulas Classe 300.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Designa\u00e7\u00f5es de materiais corporais<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As especifica\u00e7\u00f5es da v\u00e1lvula de esfera geralmente incluem c\u00f3digos de materiais que indicam do que o corpo da v\u00e1lvula \u00e9 feito:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>WCB<\/strong>: A\u00e7o carbono fundido<\/li>\n\n\n\n<li><strong>CF8M<\/strong>: A\u00e7o inoxid\u00e1vel (316)<\/li>\n\n\n\n<li><strong>CF8<\/strong>: A\u00e7o inoxid\u00e1vel (304)<\/li>\n\n\n\n<li><strong>LCB<\/strong>: A\u00e7o carbono de baixa temperatura<\/li>\n\n\n\n<li><strong>LCC<\/strong>: A\u00e7o carbono de baixa temperatura (melhor resist\u00eancia ao impacto)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A sele\u00e7\u00e3o do material afeta as classifica\u00e7\u00f5es de press\u00e3o, os limites de temperatura e a compatibilidade qu\u00edmica.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Tipos de conex\u00e3o final<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As especifica\u00e7\u00f5es da v\u00e1lvula de esfera tamb\u00e9m incluem o tipo de conex\u00e3o, que deve corresponder ao seu sistema de tubula\u00e7\u00e3o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Flangeado<\/strong>: Usando flanges padronizados (RF, FF, RTJ)<\/li>\n\n\n\n<li><strong>Rosqueado<\/strong>: Roscas NPT ou BSPT<\/li>\n\n\n\n<li><strong>Solda de soquete<\/strong>:Para conex\u00f5es soldadas<\/li>\n\n\n\n<li><strong>Solda de topo<\/strong>: Para soldagem direta em tubos<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Para aplica\u00e7\u00f5es especializadas de controle de fluxo, <a href=\"https:\/\/www.onerovalve.com\/pt\/blog\/3-way-ball-valve-guide\/\" target=\"_blank\" rel=\"noreferrer noopener\">V\u00e1lvulas de esfera de 3 vias<\/a> oferecem op\u00e7\u00f5es de configura\u00e7\u00e3o adicionais al\u00e9m dos designs bidirecionais padr\u00e3o.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Considera\u00e7\u00f5es sobre temperatura<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Embora as classifica\u00e7\u00f5es de press\u00e3o normalmente se refiram \u00e0 temperatura ambiente, as v\u00e1lvulas devem ser reduzidas para temperaturas mais altas. Os gr\u00e1ficos do fabricante mostram o quanto a classifica\u00e7\u00e3o de press\u00e3o diminui com o aumento da temperatura.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por exemplo, uma v\u00e1lvula Classe 150 classificada para 285 PSI a 100\u00b0F pode suportar apenas 260 PSI a 200\u00b0F.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclus\u00e3o<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Compreender as especifica\u00e7\u00f5es das v\u00e1lvulas de esfera garante a sele\u00e7\u00e3o da v\u00e1lvula certa para a sua aplica\u00e7\u00e3o. Ao interpretar corretamente as designa\u00e7\u00f5es de tamanho, as classifica\u00e7\u00f5es de press\u00e3o como CWP e WOG, as classifica\u00e7\u00f5es de classe e as especifica\u00e7\u00f5es de material, voc\u00ea pode evitar erros dispendiosos e garantir a seguran\u00e7a do sistema.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ao comparar v\u00e1lvulas de esfera com outras op\u00e7\u00f5es, como v\u00e1lvulas de gaveta, nosso guia sobre <a href=\"https:\/\/www.onerovalve.com\/pt\/blog\/comparison\/gate-valve-vs-ball-valve-9-key-differences\/\" target=\"_blank\" rel=\"noreferrer noopener\">diferen\u00e7as entre v\u00e1lvula de gaveta e v\u00e1lvula de esfera<\/a> pode ajudar voc\u00ea a determinar qual \u00e9 mais adequado para sua aplica\u00e7\u00e3o espec\u00edfica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lembre-se de que essas especifica\u00e7\u00f5es funcionam em conjunto como um sistema; a classifica\u00e7\u00e3o de press\u00e3o \u00e9 v\u00e1lida apenas para a faixa de temperatura e a compatibilidade do meio especificadas. Consulte sempre a documenta\u00e7\u00e3o do fabricante para obter as informa\u00e7\u00f5es mais precisas para o seu modelo espec\u00edfico de v\u00e1lvula.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ball valve markings provide essential information about size, pressure capabilities, and suitable applications. However, they can seem like a foreign language if you&#8217;re unfamiliar with industry<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":3387,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3386","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Read Ball Valve Specifications (NPS, DN, Class Ratings)<\/title>\n<meta name=\"description\" content=\"Learn how to read ball valve specifications including NPS, DN, pressure ratings (CWP &amp; WOG), and class ratings to select the right valve for your application.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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