{"id":2454,"count":7,"description":"<!-- wp:paragraph -->\r\n\r\nAo selecionar o material da v\u00e1lvula de gaveta, o material deve ser determinado de acordo com as condi\u00e7\u00f5es reais de trabalho, como a temperatura, a press\u00e3o e o meio. O material da v\u00e1lvula de gaveta ZECO inclui, mas n\u00e3o se limita a a\u00e7o inoxid\u00e1vel, a\u00e7o carbono, forjado e criog\u00e9nico.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n\u00c1gua, \u00f3leo, g\u00e1s natural, vapor e outros meios n\u00e3o corrosivos, o material mais comumente usado do corpo da v\u00e1lvula, castelo da v\u00e1lvula e a cunha \u00e9 A216 WCB, e ap\u00f3s o tratamento NACE MR-01-75 ou NACE MR-01-03, o material A216 WCB tamb\u00e9m \u00e9 frequentemente usado na condi\u00e7\u00e3o de leve corros\u00e3o. Uma coisa a notar, no entanto, \u00e9 que a faixa de temperatura do A216 WCB \u00e9 de -29 \u2103 a 425 \u2103.<!-- \/wp:paragraph -->\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Pe\u00e7as para v\u00e1lvulas de gaveta<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>O corpo da v\u00e1lvula \u00e9 a parte principal da v\u00e1lvula que mant\u00e9m tudo unido. A maior parte das vezes, est\u00e1 ligado \u00e0 tubagem atrav\u00e9s de uma flange e de uma junta. \u00c9 o limite de press\u00e3o da v\u00e1lvula.<\/li>\r\n \t<li>O castelo da v\u00e1lvula \u00e9 o segundo limite de press\u00e3o. Est\u00e1 ligado ao corpo da v\u00e1lvula atrav\u00e9s de parafusos ou flanges.<\/li>\r\n \t<li>A guarni\u00e7\u00e3o da v\u00e1lvula, que re\u00fane as hastes, a sede e o disco, \u00e9 conhecida como guarni\u00e7\u00e3o da v\u00e1lvula. O desempenho da v\u00e1lvula depende da disposi\u00e7\u00e3o da sede e do disco.<\/li>\r\n \t<li>A sede e o disco s\u00e3o a parte mais importante da v\u00e1lvula de gaveta. Cont\u00e9m um disco do tipo gaveta e uma sede que se encaixa firmemente no disco.<\/li>\r\n \t<li>A haste liga o atuador e o disco na v\u00e1lvula de gaveta. Abre e fecha a disposi\u00e7\u00e3o do disco e da sede. Est\u00e3o dispon\u00edveis dois tipos de haste: uma \u00e9 ascendente, que se eleva quando abrimos a v\u00e1lvula, e a outra \u00e9 n\u00e3o ascendente, que n\u00e3o tem movimento vertical.<\/li>\r\n \t<li>O atuador da v\u00e1lvula \u00e9 uma roda manual que acciona a disposi\u00e7\u00e3o da haste e do disco.<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Como selecionar materiais para v\u00e1lvulas<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nO desafio na escolha de um material \u00e9, de facto, verificar se o material escolhido \u00e9 o mais adequado para a aplica\u00e7\u00e3o. Isto implica ter em conta as condi\u00e7\u00f5es de trabalho e as propriedades do meio de escoamento.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nO mais importante no que respeita \u00e0s condi\u00e7\u00f5es de trabalho \u00e9 conhecer as classifica\u00e7\u00f5es de press\u00e3o e temperatura e, para os meios de trabalho, \u00e9 necess\u00e1rio ter em considera\u00e7\u00e3o as propriedades corrosivas e erosivas. Al\u00e9m disso, poder\u00e1 ser necess\u00e1rio ter em conta os choques t\u00e9rmicos e f\u00edsicos, a tens\u00e3o na linha e os riscos de inc\u00eandio.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEm termos gerais, ao considerar as limita\u00e7\u00f5es de temperatura dos diferentes grupos de materiais, o Quadro 1 deve ser utilizado como refer\u00eancia geral para a sele\u00e7\u00e3o de materiais.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:html -->\r\n<table border=\"=1\" width=\"800\">\r\n<tbody>\r\n<tr>\r\n<td>Gama<\/td>\r\n<td>Temperatura (\u00b0F)<\/td>\r\n<td>Material<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Muito elevado<\/td>\r\n<td>2000<\/td>\r\n<td>Metais refract\u00e1rios, cer\u00e2mica<\/td>\r\n<\/tr>\r\n<tr>\r\n<td rowspan=\"2\">Elevado<\/td>\r\n<td>1600<\/td>\r\n<td>Alta temperatura<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>1200<\/td>\r\n<td>A\u00e7os de liga<\/td>\r\n<\/tr>\r\n<tr>\r\n<td rowspan=\"5\">Intermedi\u00e1rio<\/td>\r\n<td>1000<\/td>\r\n<td>A\u00e7o carbono<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>650<\/td>\r\n<td>Ferro fundido d\u00factil<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>550<\/td>\r\n<td>Bronze<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>450<\/td>\r\n<td>Ferro fundido<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>150<\/td>\r\n<td>Pl\u00e1stico PVC<\/td>\r\n<\/tr>\r\n<tr>\r\n<td rowspan=\"2\">Baixa<\/td>\r\n<td rowspan=\"2\">-250<\/td>\r\n<td>A\u00e7os de baixa liga<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Bronze<\/td>\r\n<\/tr>\r\n<tr>\r\n<td rowspan=\"2\">Muito baixo (criog\u00e9nico)<\/td>\r\n<td rowspan=\"2\">-450<\/td>\r\n<td>Bronze, ferro fundido d\u00factil austen\u00edtico<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>A\u00e7os inoxid\u00e1veis austen\u00edticos<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<!-- \/wp:html -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEm alguns casos, \u00e9 necess\u00e1rio chegar a um compromisso na sele\u00e7\u00e3o de um material. Algumas condi\u00e7\u00f5es de servi\u00e7o requerem a utiliza\u00e7\u00e3o de ligas e metais ex\u00f3ticos para resistir a propriedades corrosivas espec\u00edficas do fluido em circula\u00e7\u00e3o. Estes materiais s\u00e3o muito mais caros do que os metais comuns, pelo que a economia pode tamb\u00e9m ser um fator na sele\u00e7\u00e3o do material. A Tabela 2 mostra os materiais ASTM amplamente utilizados para corpos e capotas de v\u00e1lvulas.\r\n\r\n<!-- \/wp:paragraph -->\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>Classe ANSI<\/td>\r\n<td>Material<\/td>\r\n<td>Especifica\u00e7\u00e3o ASTM<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>125<\/td>\r\n<td>Bronze<\/td>\r\n<td>B 62<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>125<\/td>\r\n<td>Ferro fundido<\/td>\r\n<td>A216 Cl. B<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>150<\/td>\r\n<td>Bronze<\/td>\r\n<td>B 62 \/ B 148<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>150<\/td>\r\n<td>A\u00e7o carbono<\/td>\r\n<td>A216 GR. WCB<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>150<\/td>\r\n<td>A\u00e7o forjado<\/td>\r\n<td>A105<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>150<\/td>\r\n<td>Ferro fundido d\u00factil<\/td>\r\n<td>A536<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>200<\/td>\r\n<td>Bronze<\/td>\r\n<td>B 61 \/ B 148<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>250<\/td>\r\n<td>Ferro fundido<\/td>\r\n<td>A216 Cl. B<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>300<\/td>\r\n<td>A\u00e7o carbono<\/td>\r\n<td>A216 GR. WCB<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>300<\/td>\r\n<td>A\u00e7o forjado<\/td>\r\n<td>A105<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>600<\/td>\r\n<td>A\u00e7o carbono<\/td>\r\n<td>A216 GR. WCB<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>600<\/td>\r\n<td>A\u00e7o forjado<\/td>\r\n<td>A105<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<figcaption>Quadro 2<\/figcaption><\/figure>\r\n<!-- \/wp:table -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nOs internos incluem normalmente um disco, uma sede, uma haste e os casquilhos necess\u00e1rios para guiar a haste. Os materiais dos internos da v\u00e1lvula em rela\u00e7\u00e3o aos limites de temperatura devem ser seleccionados de acordo com a Tabela 3.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:html -->\r\n<table border=\"=1\" width=\"800\">\r\n<tbody>\r\n<tr>\r\n<td rowspan=\"2\">MATERIAL<\/td>\r\n<td rowspan=\"2\">CANDIDATURA<\/td>\r\n<td colspan=\"2\">BAIXO<\/td>\r\n<td colspan=\"2\">SUPERIOR<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>\u00b0F<\/td>\r\n<td>\u00b0C<\/td>\r\n<td>\u00b0F<\/td>\r\n<td>\u00b0C<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>304 SST, S30400, CF8<\/td>\r\n<td>Tamp\u00f5es e assentos n\u00e3o revestidos<\/td>\r\n<td>-450<\/td>\r\n<td>-268<\/td>\r\n<td>600<\/td>\r\n<td>316<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>316 SST, S31600, CF8M<\/td>\r\n<td>Tamp\u00f5es e assentos n\u00e3o revestidos<\/td>\r\n<td>-450<\/td>\r\n<td>-268<\/td>\r\n<td>600<\/td>\r\n<td>316<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>317 SST, S31700, CG8M<\/td>\r\n<td>Tamp\u00f5es e assentos n\u00e3o revestidos<\/td>\r\n<td>-450<\/td>\r\n<td>-268<\/td>\r\n<td>600<\/td>\r\n<td>316<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>416 SST, S41600, 38 HRC min<\/td>\r\n<td>Gaiolas, tamp\u00f5es e assentos<\/td>\r\n<td>-20<\/td>\r\n<td>-29<\/td>\r\n<td>800<\/td>\r\n<td>427<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>CA6NM, 32 HRC min<\/td>\r\n<td>Gaiolas, tamp\u00f5es e assentos<\/td>\r\n<td>-20<\/td>\r\n<td>-29<\/td>\r\n<td>900<\/td>\r\n<td>482<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Nitronic 50, S20910 Condi\u00e7\u00e3o de alta resist\u00eancia<\/td>\r\n<td>Eixo, haste e pinos<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>1100<\/td>\r\n<td>593<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>440 SST, S44004<\/td>\r\n<td>Buchas, tamp\u00f5es e assentos<\/td>\r\n<td>-20<\/td>\r\n<td>-29<\/td>\r\n<td>800<\/td>\r\n<td>427<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>17-4PH, S17400, CB7Cu-1, H1075 Condi\u00e7\u00e3o<\/td>\r\n<td>Gaiolas, tamp\u00f5es e assentos<\/td>\r\n<td>-80<\/td>\r\n<td>-62<\/td>\r\n<td>800<\/td>\r\n<td>427<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Liga 6, R3006, CoCr-A<\/td>\r\n<td>Tamp\u00f5es e assentos<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>1500<\/td>\r\n<td>816<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Revestimento de n\u00edquel eletrol\u00edtico<\/td>\r\n<td>Revestimento de guarni\u00e7\u00e3o<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>750<\/td>\r\n<td>400<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Cromagem dura<\/td>\r\n<td>Revestimento de guarni\u00e7\u00e3o<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>600<\/td>\r\n<td>316<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Cromagem dura em esferas em V<\/td>\r\n<td>Revestimento de guarni\u00e7\u00e3o<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>800<\/td>\r\n<td>427<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Revestimento de cr\u00f3mio duro<\/td>\r\n<td>Revestimento de guarni\u00e7\u00e3o<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>1100<\/td>\r\n<td>593<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Monel K500, N05500<\/td>\r\n<td>Tamp\u00f5es e assentos n\u00e3o revestidos<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>800<\/td>\r\n<td>427<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Monel K400, N04400<\/td>\r\n<td>Tamp\u00f5es e assentos n\u00e3o revestidos<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>800<\/td>\r\n<td>427<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Hastelloy B2, N10665, N7M<\/td>\r\n<td>Tamp\u00f5es e assentos n\u00e3o revestidos<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>800<\/td>\r\n<td>427<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Hastelloy C276, N10276, CW2M<\/td>\r\n<td>Tamp\u00f5es e assentos n\u00e3o revestidos<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>800<\/td>\r\n<td>427<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Tit\u00e2nio Graus 2, 3, 4, C2, C3, C4<\/td>\r\n<td>Tamp\u00f5es e assentos n\u00e3o revestidos<\/td>\r\n<td>-75<\/td>\r\n<td>-59<\/td>\r\n<td>600<\/td>\r\n<td>316<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>N\u00edquel, N02200, CZ100<\/td>\r\n<td>Tamp\u00f5es e assentos n\u00e3o revestidos<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>600<\/td>\r\n<td>316<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Liga 20, N08020, CN7M<\/td>\r\n<td>Tamp\u00f5es e assentos n\u00e3o revestidos<\/td>\r\n<td>-325<\/td>\r\n<td>-198<\/td>\r\n<td>600<\/td>\r\n<td>316<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>NBR, borracha nitr\u00edlica<\/td>\r\n<td>Assentos<\/td>\r\n<td>-20<\/td>\r\n<td>-29<\/td>\r\n<td>200<\/td>\r\n<td>93<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>FKM Fluoroelast\u00f3mero<\/td>\r\n<td>Assentos<\/td>\r\n<td>0<\/td>\r\n<td>-18<\/td>\r\n<td>400<\/td>\r\n<td>204<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>PTFE, Politetrafluoroetileno<\/td>\r\n<td>Assentos<\/td>\r\n<td>-450<\/td>\r\n<td>-268<\/td>\r\n<td>450<\/td>\r\n<td>232<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>PA, Nylon<\/td>\r\n<td>Assentos<\/td>\r\n<td>-60<\/td>\r\n<td>-51<\/td>\r\n<td>200<\/td>\r\n<td>93<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>HDPE, Polietileno de Alta Densidade<\/td>\r\n<td>Assentos<\/td>\r\n<td>-65<\/td>\r\n<td>-54<\/td>\r\n<td>185<\/td>\r\n<td>85<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>CR, Cloropreno<\/td>\r\n<td>Assentos<\/td>\r\n<td>-40<\/td>\r\n<td>-40<\/td>\r\n<td>180<\/td>\r\n<td>82<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<!-- \/wp:html -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-gate-valve-for-sale-list-by-material\">V\u00e1lvula de gaveta para venda Lista por material<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:columns -->\r\n<div class=\"wp-block-columns\">\r\n\r\n<!-- wp:column -->\r\n<div class=\"wp-block-column\">\r\n\r\n<!-- wp:image {\"align\":\"center\",\"id\":16182,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\r\n<figure class=\"wp-block-image aligncenter size-full\"><img class=\"wp-image-16182\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/carbon-steel-gate-valve.jpg\" alt=\"V\u00e1lvula de gaveta em a\u00e7o carbono\" \/><figcaption><a href=\"https:\/\/zecovalve.com\/pt\/products\/carbon-steel-gate-valve.html\/\">V\u00e1lvula de gaveta em a\u00e7o carbono<em>\/ OBTER PRE\u00c7O DA V\u00c1LVULA &gt;<\/em><\/a><\/figcaption><\/figure>\r\n<!-- \/wp:image -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<a href=\"https:\/\/zecovalve.com\/pt\/products\/carbon-steel-gate-valve.html\/\">V\u00e1lvula de gaveta em a\u00e7o carbonoA v\u00e1lvula de gaveta em a\u00e7o carbono da ZECO est\u00e1 empenhada em fornecer aos utilizadores o design do produto para a vida \u00fatil do maior e mais fi\u00e1vel desempenho de veda\u00e7\u00e3o.<\/a>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<!-- wp:column -->\r\n<div class=\"wp-block-column\">\r\n\r\n<!-- wp:image {\"align\":\"center\",\"id\":16248,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\r\n<figure class=\"wp-block-image aligncenter size-full\"><img class=\"wp-image-16248\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/manual-gate-valve.jpg\" alt=\"V\u00e1lvula de gaveta manual\" \/><figcaption><a href=\"https:\/\/zecovalve.com\/pt\/products\/stainless-steel-gate-valve.html\/\">V\u00e1lvula de gaveta em a\u00e7o inoxid\u00e1vel<em>\/ OBTER PRE\u00c7O DA V\u00c1LVULA &gt;<\/em><\/a><\/figcaption><\/figure>\r\n<!-- \/wp:image -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<a href=\"https:\/\/zecovalve.com\/pt\/products\/stainless-steel-gate-valve.html\/\">V\u00e1lvula de gaveta em a\u00e7o inoxid\u00e1velA v\u00e1lvula de gaveta em a\u00e7o inoxid\u00e1vel da ZECO \u00e9 basicamente utilizada para tubagens com meios corrosivos. Para qualquer tipo de material de a\u00e7o inoxid\u00e1vel, a capacidade de resistir \u00e0 corros\u00e3o m\u00e9dia \u00e9 relativamente limitada e \u00e9 afetada por muitos factores externos, como a temperatura.<\/a>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<\/div>\r\n<!-- \/wp:columns -->\r\n\r\n<!-- wp:columns -->\r\n<div class=\"wp-block-columns\">\r\n\r\n<!-- wp:column -->\r\n<div class=\"wp-block-column\">\r\n\r\n<!-- wp:image {\"align\":\"center\",\"id\":16562,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\r\n<figure class=\"wp-block-image aligncenter size-full\"><img class=\"wp-image-16562\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/cast-steel-gate-valve.jpg\" alt=\"V\u00e1lvula de gaveta em a\u00e7o fundido\" \/><figcaption><a href=\"https:\/\/zecovalve.com\/pt\/products\/cast-steel-gate-valve.html\/\">V\u00e1lvula de gaveta em a\u00e7o fundido<em>\/ OBTER PRE\u00c7O DA V\u00c1LVULA &gt;<\/em><\/a><\/figcaption><\/figure>\r\n<!-- \/wp:image -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<a href=\"https:\/\/zecovalve.com\/pt\/products\/cast-steel-gate-valve.html\/\">V\u00e1lvula de gaveta em a\u00e7o fundidoA v\u00e1lvula de gaveta em a\u00e7o fundido da ZECO \u00e9 controlada pelo sistema de garantia de qualidade de produ\u00e7\u00e3o e fabrico, tendo cumprido todas as normas internacionais da ind\u00fastria e os procedimentos documentados dos requisitos do utilizador.\/ OBTER PRE\u00c7O DA V\u00c1LVULA &gt;<\/a>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<!-- wp:column -->\r\n<div class=\"wp-block-column\">\r\n\r\n<!-- wp:image {\"align\":\"center\",\"id\":16061,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\r\n<figure class=\"wp-block-image aligncenter size-full\"><img class=\"wp-image-16061\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/wcb-gate-valve-1.jpg\" alt=\"V\u00e1lvula de gaveta WCB\" \/><figcaption><a href=\"https:\/\/zecovalve.com\/pt\/products\/wcb-gate-valve.html\/\">V\u00e1lvula de gaveta WCB<em>\/ OBTER PRE\u00c7O DA V\u00c1LVULA &gt;<\/em><\/a><\/figcaption><\/figure>\r\n<!-- \/wp:image -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<a href=\"https:\/\/zecovalve.com\/pt\/products\/wcb-gate-valve.html\/\">V\u00e1lvula de gaveta WCBZECO Refer\u00eancia de projeto da v\u00e1lvula de gaveta WCB API 600. As v\u00e1lvulas de gaveta WCB cumprem as dimens\u00f5es ASME B16.10 face a face \/ OBTER PRE\u00c7O DA V\u00c1LVULA &gt;<\/a>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<\/div>\r\n<!-- \/wp:columns -->\r\n\r\n<!-- wp:columns -->\r\n<div class=\"wp-block-columns\">\r\n\r\n<!-- wp:column -->\r\n<div class=\"wp-block-column\">\r\n\r\n<!-- wp:image {\"align\":\"center\",\"id\":16591,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\r\n<figure class=\"wp-block-image aligncenter size-full\"><img class=\"wp-image-16591\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/high-pressure-gate-valve.jpg\" alt=\"V\u00e1lvula de gaveta de alta press\u00e3o\" \/><figcaption><a href=\"https:\/\/zecovalve.com\/pt\/products\/high-pressure-gate-valve.html\/\">V\u00e1lvula de gaveta de alta press\u00e3o<em>\/ OBTER PRE\u00c7O DA V\u00c1LVULA &gt;<\/em><\/a><\/figcaption><\/figure>\r\n<!-- \/wp:image -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<a href=\"https:\/\/zecovalve.com\/pt\/products\/high-pressure-gate-valve.html\/\">V\u00e1lvula de gaveta de alta press\u00e3oQuando a press\u00e3o \u00e9 baixa, a espessura da flange \u00e9 pequena, o aumento do custo n\u00e3o \u00e9 muito grande, o stress t\u00e9rmico gerado quando o aquecimento e o arrefecimento s\u00e3o pequenos, dependem da for\u00e7a de aperto do parafuso e da junta f\u00e1cil de conseguir a veda\u00e7\u00e3o.\/ OBTER PRE\u00c7O DA V\u00c1LVULA &gt;<\/a>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<!-- wp:column -->\r\n<div class=\"wp-block-column\">\r\n\r\n<!-- wp:image {\"align\":\"center\",\"id\":16113,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\r\n<figure class=\"wp-block-image aligncenter size-full\"><img class=\"wp-image-16113\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/cryogenic-gate-valve.jpg\" alt=\"V\u00e1lvula de gaveta criog\u00e9nica\" \/><figcaption><a href=\"https:\/\/zecovalve.com\/pt\/products\/cryogenic-gate-valve.html\/\">V\u00e1lvula de gaveta criog\u00e9nica<em>\/ OBTER PRE\u00c7O DA V\u00c1LVULA &gt;<\/em><\/a><\/figcaption><\/figure>\r\n<!-- \/wp:image -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<a href=\"https:\/\/zecovalve.com\/pt\/products\/cryogenic-gate-valve.html\/\">V\u00e1lvula de gaveta criog\u00e9nicaA v\u00e1lvula de gaveta criog\u00e9nica ZECO utiliza uma cunha flex\u00edvel ou uma cunha aberta. Estas estruturas mant\u00eam uma veda\u00e7\u00e3o fi\u00e1vel independentemente da temperatura.\/ OBTER PRE\u00c7O DA V\u00c1LVULA &gt;<\/a>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<\/div>\r\n<!-- \/wp:columns -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-material-choices-of-gate-valve\">Op\u00e7\u00f5es de materiais da v\u00e1lvula de gaveta<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nComo as condi\u00e7\u00f5es de alta temperatura, o meio \u00e9 vapor de alta temperatura ou condi\u00e7\u00f5es de ar quente, geralmente, a escolha de materiais para materiais resistentes a altas temperaturas, como A217 WC6, A217 WC9, a faixa de temperatura de A217 WC6 e A217 WC9 \u00e9 de -29 \u2103 a 593 \u2103.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA352 LCB, A352 LCC \u00e9 geralmente usado para uma aplica\u00e7\u00e3o de baixa temperatura, geralmente, o meio \u00e9 de baixa temperatura, mas acima de -46 \u2103 ou atrav\u00e9s da v\u00e1lvula de gaveta do condu\u00edte \u00e9 instalado ao ar livre em uma \u00e1rea de ambiente frio. Mas esses materiais n\u00e3o podem ser usados para alta temperatura acima de 345 \u2103.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA351 CF8, A351 CF8M, A351 CF3, A351 CF3M, estes a\u00e7os inoxid\u00e1veis austen\u00edticos s\u00e3o anti-ferrugem e anti-corros\u00e3o, adequados para o meio de v\u00e1rios tipos de \u00e1cido. A351 CF8, A351 CF8M, A351 CF3 e A351 CF3M podem ser utilizados na maioria das condi\u00e7\u00f5es de baixa temperatura, mas necessitam de tratamento criog\u00e9nico. Tamb\u00e9m pode ser utilizado na maioria das condi\u00e7\u00f5es de alta temperatura, mas existem normas correspondentes para o teor de carbono.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nBronze-alum\u00ednio como B148 C95800, B62 C83600, B283 C61300 e outros bronzes-alum\u00ednio s\u00e3o perfeitamente adequados para aplica\u00e7\u00e3o em \u00e1gua do mar.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nOs a\u00e7os duplex A890 4A, A890 5A, SAF2205, S31803 e os a\u00e7os super duplex A890 6A, SAF2507, S32750 t\u00eam uma gama de aplica\u00e7\u00e3o semelhante \u00e0 do bronze-alum\u00ednio, t\u00eam uma boa resist\u00eancia \u00e0 corros\u00e3o por cloretos, pelo que s\u00e3o amplamente utilizados para aplica\u00e7\u00f5es em \u00e1gua do mar e em \u00e1gua produzida.\r\n\r\n<!-- \/wp:paragraph -->","link":"https:\/\/zecovalve.com\/pt\/categoria-do-produto\/gate-valve\/gate-valve-by-material","name":"V\u00e1lvula de gaveta por material","slug":"gate-valve-by-material","taxonomy":"product_cat","parent":2052,"meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Gate Valve Parts - How to Select Right Gate Valve Material | 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\/categoria-do-produto\/gate-valve\/gate-valve-by-material\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gate Valve Parts - How to Select Right Gate Valve Material | ZECO Valve\" \/>\n<meta property=\"og:description\" content=\"When selecting the valve material of the gate valve, the material should be determined according to the actual conditions of working conditions such as temperature, pressure &amp; medium. The material of ZECO gate valve includes, but is not limited to stainless steel, carbon steel, forged and cryogenic.  Water, oil, natural gas, steam, and other non-corrosive media the most commonly used material of valve body, valve bonnet, and the wedge is A216 WCB, and after NACE MR-01-75 or NACE MR-01-03 treatment, A216 WCB material is also often used in the condition of slight corrosion. One thing to note, however, is that the temperature range of A216 WCB is\u00a0-29\u2103 to 425\u2103.  Gate Valve Parts  The valve body is the primary part of the valve which holds everything together. Mostly it is connected to piping through flange and gasket. It is the pressure boundary of the valve. The valve bonnet is the second boundary of pressure. It is connected with a valve body with bolts or flange. The valve trim collectively stems, seat, and the disk is known as valve trim. Valve performance is dependent on seat and disk arrangement. The seat and disk are the most important part of the gate valve. It contains a gate-type disk and seat which fits the disk tightly. The stem connects the actuator and disk in the gate valve. It opens and closes the disk and seat arrangement. Two types of the stem are available one is rising which rises when we open the valve and the other is non-rising which has no vertical motion. Valve Actuator is a manual wheel which operates stem and disk arrangement.  How to Select Valve Materials  The challenge in making a material choice is actually verifying that the chosen material best fits the application. This involves taking into account working conditions and flow media properties.  Most important concerning the working conditions is to know the pressure and temperature ratings and for working media is to take in consideration corrosive and erosive properties. Additionally, it might be needed to consider thermal and physical shock, line stress and fire hazards.  Broadly speaking when considering temperature limitations of different groups of materials Table 1. should be used as general reference for material selection.   Range Temperature(\u00b0F) Material  Very High 2000 Refractory Metals, Ceramics  High 1600 High Temperature  1200 Alloy Steels  Intermediate 1000 Carbon Steel  650 Ductile Iron  550 Bronze  450 Cast Iron  150 PVC Plastic  Low -250 Low Alloy Steels  Bronze  Very Low(Cryogenic) -450 Bronze, Austenitic Ductile Iron  Austenitic Stainless Steels   In some cases a compromise must be reached in selecting a material. Some service conditions require use of exotic alloys and metals to withstand particular corrosive properties of the flowing fluid. These materials are much more expensive than common metals, so economy may also be a factor in material selection. Table 2 shows ASTM materials widely used for valve bodies and bonnets.    ANSI Class Material ASTM Specification  125 Bronze B 62  125 Cast Iron A216 Cl. B  150 Bronze B 62 \/ B 148  150 Carbon Steel A216 GR. WCB  150 Forged Steel A105  150 Ductile Iron A536  200 Bronze B 61 \/ B 148  250 Cast Iron A216 Cl. B  300 Carbon Steel A216 GR. WCB  300 Forged Steel A105  600 Carbon Steel A216 GR. WCB  600 Forged Steel A105  Table 2  The trim typically includes a disk, seat, stem, and sleeves needed to guide the stem. Valve trim materials in relation to temperature limits should be selected in according to Table 3.   MATERIAL APPLICATION LOWER UPPER  \u00b0F \u00b0C \u00b0F \u00b0C  304 SST, S30400, CF8 Uncoated Plugs and Seats -450 -268 600 316  316 SST, S31600, CF8M Uncoated Plugs and Seats -450 -268 600 316  317 SST, S31700, CG8M Uncoated Plugs and Seats -450 -268 600 316  416 SST, S41600, 38 HRC min Cages, Plugs and Seats -20 -29 800 427  CA6NM, 32 HRC min Cages, Plugs and Seats -20 -29 900 482  Nitronic 50, S20910 High Strength Condition Shaft, Stem and Pins -325 -198 1100 593  440 SST, S44004 Bushings, Plugs and Seats -20 -29 800 427  17-4PH, S17400, CB7Cu-1, H1075 Condition Cages, Plugs and Seats -80 -62 800 427  Alloy 6, R3006, CoCr-A Plugs and Seats -325 -198 1500 816  Electroless Nickel Coating Trim Coating -325 -198 750 400  Hard Chromium Plating Trim Coating -325 -198 600 316  Hard Chromium Plating on V-Balls Trim Coating -325 -198 800 427  Hard Chromium Coating Trim Coating -325 -198 1100 593  Monel K500, N05500 Uncoated Plugs and Seats -325 -198 800 427  Monel K400, N04400 Uncoated Plugs and Seats -325 -198 800 427  Hastelloy B2, N10665, N7M Uncoated Plugs and Seats -325 -198 800 427  Hastelloy C276, N10276, CW2M Uncoated Plugs and Seats -325 -198 800 427  Titanium Grades 2, 3, 4, C2, C3, C4 Uncoated Plugs and Seats -75 -59 600 316  Nickel, N02200, CZ100 Uncoated Plugs and Seats -325 -198 600 316  Alloy 20, N08020, CN7M Uncoated Plugs and Seats -325 -198 600 316  NBR, Nitrile Rubber Seats -20 -29 200 93  FKM Fluoroelastomer Seats 0 -18 400 204  PTFE, Polytetrafluoroethylene Seats -450 -268 450 232  PA, Nylon Seats -60 -51 200 93  HDPE, High Density Polyethylene Seats -65 -54 185 85  CR, Chloroprene Seats -40 -40 180 82   Gate Valve for Sale List by Material    Carbon Steel Gate Valve\/ GET VALVE PRICE &gt;  Carbon Steel Gate ValveZECO carbon steel gate valve is committed to providing users with product design into the service life of the largest and most reliable sealing performance.\/ GET VALVE PRICE &gt;    Stainless Steel Gate Valve\/ GET VALVE PRICE &gt;  Stainless Steel Gate ValveZECO stainless steel gate valve is basically used for pipelines with corrosive media. For any kind of stainless steel material, the ability to resist medium corrosion is relatively limited and is affected by many external factors, such as temperature.\/ GET VALVE PRICE &gt;      Cast Steel Gate Valve\/ GET VALVE PRICE &gt;  Cast Steel Gate ValveZECO cast steel gate valve is in controlled under the quality assurance system of production and manufacturing, has met all the international industry standards and user requirements documented procedures.\/ GET VALVE PRICE &gt;    WCB Gate Valve\/ GET VALVE PRICE &gt;  WCB Gate ValveZECO WCB gate valve design reference API 600. WCB gate valves meet ASME B16.10 face to face dimensions.\/ GET VALVE PRICE &gt;      High Pressure Gate Valve\/ GET VALVE PRICE &gt;  High Pressure Gate ValveWhen the pressure is low, the flange thickness is small, the cost increase is not much, the heat stress generated when heating and cooling is small, rely on bolt tightening force and gasket easy to achieve sealing.\/ GET VALVE PRICE &gt;    Cryogenic Gate Valve\/ GET VALVE PRICE &gt;  Cryogenic Gate ValveZECO cryogenic gate valve uses a flexible wedge or open wedge. These structures maintain a reliable seal regardless of temperature.\/ GET VALVE PRICE &gt;    Material Choices of Gate Valve  Like high-temperature conditions, the medium is high-temperature steam or hot air conditions, usually, the choice of materials for high-temperature-resistant materials such as A217 WC6, A217 WC9, the temperature range of A217 WC6 &amp; A217 WC9 is -29\u2103 to 593\u2103.  A352 LCB, A352 LCC is usually used for a low-temperature application, usually, the medium is of low-temperature but over -46\u2103 or through conduit gate valve is installed outdoor in area of a cold environment. But these materials can not be used for high-temperature over 345\u2103.  A351 CF8, A351 CF8M, A351 CF3, A351 CF3M, these austenitic stainless steel are anti-rust and anti-corrosion, suitable for the medium of various kinds of acid. A351 CF8, A351 CF8M, A351 CF3 &amp; A351 CF3M can be used in most low temperature conditions, but it needs cryogenic treatment. It can also be used in most high-temperature conditions, but there are corresponding standards for carbon content.  Aluminum-bronze like B148 C95800, B62 C83600, B283 C61300, and other Al-bronze are perfectly suitable for seawater application.  Duplex Steel A890 4A, A890 5A, SAF2205, S31803 and super duplex steel A890 6A, SAF2507, S32750 have similar application range of Al-Bronze, they have good resistance to chloride corrosion, so they are widely used for seawater application and produced water application.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zecovalve.com\/pt\/categoria-do-produto\/gate-valve\/gate-valve-by-material\" \/>\n<meta property=\"og:site_name\" content=\"ZECO Valve\" \/>\n<meta property=\"og:image\" content=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/carbon-steel-gate-valve.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/zecovalve.com\/#website\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"ZECO Valve\",\"description\":\"Industrial Ball Valve, Gate Valve and Globe Valve Manufacturer\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/zecovalve.com\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"CollectionPage\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/gate-valve-by-material#webpage\",\"url\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/gate-valve-by-material\",\"name\":\"Gate Valve Parts - How to Select Right Gate Valve Material | ZECO Valve\",\"isPartOf\":{\"@id\":\"https:\/\/zecovalve.com\/#website\"},\"breadcrumb\":{\"@id\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/gate-valve-by-material#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/zecovalve.com\/product-category\/gate-valve\/gate-valve-by-material\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/gate-valve-by-material#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"position\":2,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\",\"url\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\",\"name\":\"Gate Valve\"}},{\"@type\":\"ListItem\",\"position\":3,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/gate-valve-by-material\",\"url\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/gate-valve-by-material\",\"name\":\"Gate Valve By Material\"}}]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","_links":{"self":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/product_cat\/2454","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/product_cat"}],"about":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/taxonomies\/product_cat"}],"up":[{"embeddable":true,"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/product_cat\/2052"}],"wp:post_type":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/product?product_cat=2454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}