{"id":10823,"date":"2023-11-15T11:48:47","date_gmt":"2023-11-15T09:48:47","guid":{"rendered":"https:\/\/comdiflex.com\/produtos\/juntas\/juntas-planas-metalicas-nao-metalicas\/metalicas\/"},"modified":"2026-01-19T13:17:58","modified_gmt":"2026-01-19T11:17:58","slug":"metalicas","status":"publish","type":"page","link":"https:\/\/comdiflex.com\/pt\/produtos\/juntas\/juntas-planas-nao-metalicos-metalicos\/metalicas\/","title":{"rendered":"Juntas met\u00e1licas"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#eae9e9;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1012.96px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_6 1_6 fusion-flex-column imagenproducto\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div ><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><img decoding=\"async\" width=\"105\" height=\"132\" alt=\"Juntas no met\u00e1licas - juntas planas 1\" title=\"juntas-planas1\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27105%27%20height%3D%27132%27%20viewBox%3D%270%200%20105%20132%27%3E%3Crect%20width%3D%27105%27%20height%3D%273132%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-orig-src=\"http:\/\/comdiflex.com\/wp-content\/uploads\/2021\/06\/juntas-planas1.jpg\" class=\"lazyload img-responsive wp-image-6363\"\/><\/span><\/div><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-0{width:16.666666666667% !important;margin-top : 0px;margin-bottom : -10px;}.fusion-builder-column-0 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 11.52%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 11.52%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-0{width:100% !important;order : 0;}.fusion-builder-column-0 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-0{width:100% !important;order : 0;}.fusion-builder-column-0 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_5 1_5 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-1 tituloficha\" style=\"font-size:17px;color:#000000;font-family:&quot;Lato&quot;;font-weight:400;transform:translate3d(0,0,0);\"><p>JUNTAS PLANAS<\/p>\n<\/div><div class=\"fusion-text fusion-text-2\" style=\"font-size:22px;color:#000000;font-family:&quot;Lato&quot;;font-weight:700;transform:translate3d(0,0,0);\"><p>MET\u00c1LICAS<\/p>\n<\/div><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-1{width:20% !important;margin-top : 88px;margin-bottom : -10px;}.fusion-builder-column-1 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 9.6%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 9.6%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-1{width:33.333333333333% !important;order : 0;margin-top : 20px;}.fusion-builder-column-1 > .fusion-column-wrapper {margin-right : 5.76%;margin-left : 5.76%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-1{width:33.333333333333% !important;order : 0;margin-top : 20px;}.fusion-builder-column-1 > .fusion-column-wrapper {margin-right : 5.76%;margin-left : 5.76%;}}<\/style><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_1 1_1 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;width:100%;\"><div class=\"fusion-separator-border sep-single sep-dotted\" style=\"border-color:#000000;border-top-width:1px;\"><\/div><\/div><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-2{width:100% !important;margin-top : -5px;margin-bottom : 10px;}.fusion-builder-column-2 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 1.92%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 1.92%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-2{width:100% !important;order : 0;}.fusion-builder-column-2 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-2{width:100% !important;order : 0;}.fusion-builder-column-2 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-1{ padding-top : 0px;margin-top : 10px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#eae9e9;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1012.96px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_1 1_1 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div style=\"text-align:center;\"><span class=\" fusion-imageframe imageframe-none imageframe-2 hover-type-none\"><img decoding=\"async\" width=\"608\" height=\"306\" alt=\"juntas no met\u00e1licas\" title=\"juntas-planas\" src=\"https:\/\/comdiflex.com\/wp-content\/uploads\/2021\/07\/juntas-planas.jpg\" data-orig-src=\"http:\/\/comdiflex.com\/wp-content\/uploads\/2021\/07\/juntas-planas.jpg\" class=\"lazyload img-responsive wp-image-8534\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27608%27%20height%3D%27306%27%20viewBox%3D%270%200%20608%20306%27%3E%3Crect%20width%3D%27608%27%20height%3D%273306%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/comdiflex.com\/wp-content\/uploads\/2021\/07\/juntas-planas-200x101.jpg 200w, https:\/\/comdiflex.com\/wp-content\/uploads\/2021\/07\/juntas-planas-400x201.jpg 400w, https:\/\/comdiflex.com\/wp-content\/uploads\/2021\/07\/juntas-planas-600x302.jpg 600w, https:\/\/comdiflex.com\/wp-content\/uploads\/2021\/07\/juntas-planas.jpg 608w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 608px\" \/><\/span><\/div><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-3{width:100% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-3 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 1.92%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 1.92%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-3{width:100% !important;order : 0;}.fusion-builder-column-3 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-3{width:100% !important;order : 0;}.fusion-builder-column-3 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-4 fusion_builder_column_1_1 1_1 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><div class=\"fusion-text fusion-text-3\" style=\"font-family:&quot;Roboto&quot;;font-weight:400;transform:translate3d(0,0,0);\"><p>Os vedantes planos tamb\u00e9m podem ser feitos de materiais met\u00e1licos (s\u00f3lidos). Estes vedantes s\u00e3o amplamente utilizados em \u00e1reas industriais, dependendo dos valores de press\u00e3o, temperatura e do fluido em quest\u00e3o. Em geral, a sua utiliza\u00e7\u00e3o justifica-se quando \u00e9 necess\u00e1ria uma elevada estanquicidade, como resposta a condi\u00e7\u00f5es exigentes de temperaturas e\/ou press\u00f5es elevadas ou como resposta a requisitos de seguran\u00e7a contra fluidos agressivos, inflam\u00e1veis, t\u00f3xicos ou corrosivos.<\/p>\n<p>A sele\u00e7\u00e3o correcta do material da junta depender\u00e1 das condi\u00e7\u00f5es de servi\u00e7o do equipamento. Uma vez que estas juntas requerem elevadas cargas de aperto para vedar, isto significa inevitavelmente que toda a geometria de contacto entre a junta e a superf\u00edcie deve estar nas melhores condi\u00e7\u00f5es poss\u00edveis, em termos de acabamento (s\u00e3o necess\u00e1rios acabamentos muito finos), alinhamento correto da geometria e limpeza das \u00e1reas de contacto.<br \/>\nzonas de contacto. \u00c9 por isso que, nestes casos, a dureza da junta de metal maci\u00e7o \u00e9 de particular import\u00e2ncia.<br \/>\nNeste caso, a dureza das juntas e o seu acabamento superficial dependem substancialmente da dureza Brinell do material da junta. A este respeito, descobrimos que o seguinte r\u00e1cio: Rz (mm) \u2264 300\/HB fornece uma boa orienta\u00e7\u00e3o sobre o acabamento da junta necess\u00e1rio.<\/p>\n<\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:20px;width:100%;\"><\/div><div class=\"fusion-text fusion-text-4\" style=\"font-family:&quot;Roboto&quot;;font-weight:400;transform:translate3d(0,0,0);\"><table style=\"height: 82px;\" width=\"999\">\n<tbody>\n<tr>\n<td style=\"text-align: center; background: #b01117;\" rowspan=\"2\" width=\"79\"><span style=\"color: #ffffff;\">Perfil<\/span><\/td>\n<td style=\"text-align: center; background: #b01117;\" rowspan=\"2\" width=\"185\"><span style=\"color: #ffffff;\">Sec\u00e7\u00e3o<\/span><\/td>\n<td style=\"text-align: center; background: #b01117;\" rowspan=\"2\" width=\"140\"><span style=\"color: #ffffff;\">Material<\/span><\/td>\n<td style=\"text-align: center; background: #b01117;\" width=\"80\"><span style=\"color: #ffffff;\">K<sub>O<\/sub>+K<sub>D<\/sub><\/span><\/td>\n<td style=\"text-align: center; background: #b01117;\" width=\"87\"><span style=\"color: #ffffff;\">K<sub>1<\/sub><\/span><\/td>\n<td style=\"text-align: center; background: #b01117;\" width=\"89\"><span style=\"color: #ffffff;\">R<sub>Z<\/sub><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center; background: #343433;\" width=\"80\"><span style=\"color: #ffffff;\">[N\/mm]<\/span><\/td>\n<td style=\"text-align: center; background: #343433;\" width=\"87\"><\/td>\n<td style=\"text-align: center; background: #343433;\" width=\"89\"><span style=\"color: #ffffff;\">(\u00b5m)<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center; background: #343433;\" width=\"79\"><span style=\"color: #ffffff;\">A1<\/span><\/td>\n<td width=\"185\"><img decoding=\"async\" class=\"lazyload wp-image-10652 aligncenter\" src=\"http:\/\/comdiflex.com\/wp-content\/uploads\/2023\/11\/junt-A1-met.jpg\" data-orig-src=\"http:\/\/comdiflex.com\/wp-content\/uploads\/2023\/11\/junt-A1-met.jpg\" alt=\"\" width=\"120\" height=\"27\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27120%27%20height%3D%2727%27%20viewBox%3D%270%200%20120%2027%27%3E%3Crect%20width%3D%27120%27%20height%3D%27327%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/comdiflex.com\/wp-content\/uploads\/2023\/11\/junt-A1-met-150x35.jpg 150w, https:\/\/comdiflex.com\/wp-content\/uploads\/2023\/11\/junt-A1-met.jpg 156w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 120px) 100vw, 120px\" \/><\/td>\n<td style=\"text-align: center;\" width=\"140\">Metal<\/td>\n<td style=\"text-align: center;\" width=\"80\">b<sub>D<\/sub><\/td>\n<td style=\"text-align: center;\" width=\"87\">b<sub>D+5<\/sub><\/td>\n<td style=\"text-align: center;\" width=\"89\">1,6 a 6,3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:20px;width:100%;\"><\/div><div class=\"fusion-text fusion-text-5\" style=\"font-family:&quot;Roboto&quot;;font-weight:400;transform:translate3d(0,0,0);\"><p>Podemos fornecer juntas met\u00e1licas numa vasta gama de materiais (a\u00e7os inoxid\u00e1veis, a\u00e7o carbono macio, monel, cobre, lat\u00e3o, etc.).<\/p>\n<p>\u00c9 interessante notar que os materiais met\u00e1licos com baixa dureza ou baixo limite de elasticidade (como o cobre ou o alum\u00ednio) t\u00eam for\u00e7as de fecho \u03c3min relativamente pequenas em compara\u00e7\u00e3o com materiais mais duros, como o a\u00e7o-carbono.<\/p>\n<p>Se forem utilizados estes \u00faltimos materiais, \u00e9 poss\u00edvel utiliz\u00e1-los com revestimentos especiais de cobre, n\u00edquel ou prata (entre 35 \u00b5m e 50 \u00b5m, at\u00e9 um m\u00e1ximo de 100 \u00b5m); isto ter\u00e1 um efeito ben\u00e9fico na tens\u00e3o \u03c3min, reduzindo o seu valor e facilitando assim o fecho da junta.<\/p>\n<p>As juntas de metal s\u00f3lido s\u00e3o (normalmente) instaladas em encaixes de lingueta e ranhura, o que normalmente facilita a sua estabilidade dimensional e a sua operacionalidade sob cargas elevadas. No entanto, \u00e9 de notar que h\u00e1 casos em que pode ocorrer corros\u00e3o devido ao poss\u00edvel confinamento de detritos ou part\u00edculas de fluido na bolsa. Este efeito nocivo pode ser evitado atrav\u00e9s da utiliza\u00e7\u00e3o de revestimentos especiais.<\/p>\n<p>Em conclus\u00e3o, o projetista deve garantir sempre que, em condi\u00e7\u00f5es normais de funcionamento do equipamento (mesmo no caso de ensaios hidr\u00e1ulicos ou de outro tipo de ensaios), a tens\u00e3o m\u00e1xima \u03c3max (limite de rutura) nunca seja ultrapassada; por esta mesma raz\u00e3o, e tendo em conta todos os conceitos anteriores, a conce\u00e7\u00e3o dos parafusos, das flanges e da geometria e material da junta deve ser sempre coerente em todos os momentos.<\/p>\n<\/div><div class=\"fusion-text fusion-text-6\" style=\"color:#b01117;font-family:&quot;Montserrat&quot;;font-weight:400;transform:translate3d(0,0,0);\"><p><strong>Press\u00e3o de superf\u00edcie<\/strong><\/p>\n<\/div><div class=\"fusion-text fusion-text-7\" style=\"font-family:&quot;Roboto&quot;;font-weight:400;transform:translate3d(0,0,0);\"><p>O quadro de tens\u00f5es m\u00ednimas \u03c3min (fecho da junta) e m\u00e1ximas \u03c3max (limite de rotura) <strong>para as juntas met\u00e1licas do tipo A1 \u00e9 apresentado a seguir:<\/strong><\/p>\n<\/div><div style=\"text-align:center;\"><span class=\" fusion-imageframe imageframe-none imageframe-3 hover-type-none\"><img decoding=\"async\" width=\"963\" height=\"678\" title=\"presion-juntas-met\" src=\"https:\/\/comdiflex.com\/wp-content\/uploads\/2023\/11\/presion-juntas-met.jpg\" data-orig-src=\"http:\/\/comdiflex.com\/wp-content\/uploads\/2023\/11\/presion-juntas-met.jpg\" class=\"lazyload img-responsive wp-image-10672\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27963%27%20height%3D%27678%27%20viewBox%3D%270%200%20963%20678%27%3E%3Crect%20width%3D%27963%27%20height%3D%273678%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/comdiflex.com\/wp-content\/uploads\/2023\/11\/presion-juntas-met-200x141.jpg 200w, https:\/\/comdiflex.com\/wp-content\/uploads\/2023\/11\/presion-juntas-met-400x282.jpg 400w, https:\/\/comdiflex.com\/wp-content\/uploads\/2023\/11\/presion-juntas-met-600x422.jpg 600w, https:\/\/comdiflex.com\/wp-content\/uploads\/2023\/11\/presion-juntas-met-800x563.jpg 800w, https:\/\/comdiflex.com\/wp-content\/uploads\/2023\/11\/presion-juntas-met.jpg 963w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 963px\" \/><\/span><\/div><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-4{width:100% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-4 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 1.92%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 1.92%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-4{width:100% !important;order : 0;}.fusion-builder-column-4 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-4{width:100% !important;order : 0;}.fusion-builder-column-4 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><style type=\"text\/css\">.fusion-body .fusion-flex-container.fusion-builder-row-2{ padding-top : 0px;margin-top : 0px;padding-right : 0px;padding-bottom : 0px;margin-bottom : 0px;padding-left : 0px;}<\/style><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":6362,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-10823","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.9 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>JUNTAS PLANAS MET\u00c1LICAS | Veda\u00e7\u00e3o Industrial Confi\u00e1vel | COMDIFLEX<\/title>\n<meta name=\"description\" content=\"Juntas planas met\u00e1licas para flanges e aplica\u00e7\u00f5es industriais na Comdiflex. 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