{"id":2519,"date":"2026-06-22T10:20:00","date_gmt":"2026-06-22T10:20:00","guid":{"rendered":"https:\/\/www.tgvalve.com\/?p=2519"},"modified":"2026-07-07T07:28:37","modified_gmt":"2026-07-07T07:28:37","slug":"duplex-super-duplex-butterfly-valves-seawater","status":"publish","type":"post","link":"https:\/\/www.tgvalve.com\/pt\/blog\/butterfly-valve\/duplex-super-duplex-butterfly-valves-seawater\/","title":{"rendered":"Por que as v\u00e1lvulas borboleta duplex s\u00e3o a escolha padr\u00e3o para servi\u00e7os em \u00e1gua do mar?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Duplex e super <strong>v\u00e1lvulas duplex<\/strong> S\u00e3o a escolha padr\u00e3o para aplica\u00e7\u00f5es em \u00e1gua do mar devido \u00e0 sua fabrica\u00e7\u00e3o em a\u00e7o inoxid\u00e1vel e material duplex. A liga utilizada na v\u00e1lvula cont\u00e9m ferrita e austenita, o que proporciona maior resist\u00eancia mec\u00e2nica e propriedades de resist\u00eancia a cloretos.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Al\u00e9m disso, o super duplex \u00e9 a vers\u00e3o de liga superior e desempenho mais elevado. Ele apresenta melhor resist\u00eancia \u00e0 corros\u00e3o por pites e \u00e0 corros\u00e3o sob tens\u00e3o por cloretos do que o duplex padr\u00e3o.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Este artigo aprofunda-se no porqu\u00ea de um <strong>v\u00e1lvula borboleta dupla <\/strong>e super <strong>v\u00e1lvulas duplex <\/strong>S\u00e3o ideais para aplica\u00e7\u00f5es em \u00e1gua do mar.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>O que \u00e9 uma v\u00e1lvula borboleta duplex?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Um duplex ou <a href=\"https:\/\/www.tgvalve.com\/pt\/product-category\/butterfly-valve\/triple-offset-butterfly-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">v\u00e1lvula borboleta pr\u00f3pria para \u00e1gua do mar<\/a> \u00c9 uma v\u00e1lvula de controle de fluxo de um quarto de volta. O disco e o corpo s\u00e3o feitos de a\u00e7o inoxid\u00e1vel duplex ou super duplex.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2018&#039;Duplex&#039; refere-se \u00e0 liga met\u00e1lica, e n\u00e3o ao tipo de v\u00e1lvula borboleta. Ela \u00e9 composta por uma microestrutura austen\u00edtica-ferr\u00edtica de liga de a\u00e7o.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A\u00e7o austen\u00edtico<\/strong> Oferece propriedades anticorrosivas e de alta resist\u00eancia.<\/li>\n\n\n\n<li><strong>A\u00e7o ferr\u00edtico <\/strong>Proporciona resist\u00eancia contra tens\u00f5es e fissuras por corros\u00e3o sob tens\u00e3o.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Em conjunto, eles proporcionam um material com desempenho superior ao de cada um deles individualmente. O duplex 2205 e o super duplex 2507 s\u00e3o as duas classes frequentemente especificadas para v\u00e1lvulas borboleta de \u00e1gua do mar.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Qual a diferen\u00e7a entre Duplex 2205 e Super Duplex 2507?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tanto o duplex 2205 quanto o super duplex 2507 apresentam desempenho superior ao a\u00e7o inoxid\u00e1vel. No entanto, eles s\u00e3o projetados para diferentes condi\u00e7\u00f5es de servi\u00e7o.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Suas principais diferen\u00e7as residem na composi\u00e7\u00e3o da liga, que afeta diretamente sua resist\u00eancia ao ataque de cloretos.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As v\u00e1lvulas para \u00e1gua do mar na classe 2205 s\u00e3o adequadas para ambientes moderados. A classe super duplex 2507 suporta as condi\u00e7\u00f5es mais agressivas de \u00e1gua do mar e salmoura.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cada nota \u00e9 medida por <em>PREN<\/em>, o que significa <em>N\u00famero Equivalente de Resist\u00eancia \u00e0 Corros\u00e3o por Pite<\/em>. \u00c9 uma &quot;classifica\u00e7\u00e3o&quot; ou pontua\u00e7\u00e3o que os engenheiros usam para medir a capacidade de um metal resistir \u00e0 corros\u00e3o por pite.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Abaixo est\u00e3o as especifica\u00e7\u00f5es de cada n\u00edvel:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Duplex 2205 (UNS S31803 \/ S32205: ASTM A182 F51)<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"648\" src=\"https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-duplex-butterfly-valve-for-seawater-applications-featuring-Duplex-2205-material-with-a-PREN-of-35-for-coastal-service-1200x648.webp\" alt=\"V\u00e1lvula borboleta duplex para aplica\u00e7\u00f5es em \u00e1gua do mar, fabricada em material Duplex 2205 com PREN 35 para servi\u00e7o costeiro.\" class=\"wp-image-2521\" srcset=\"https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-duplex-butterfly-valve-for-seawater-applications-featuring-Duplex-2205-material-with-a-PREN-of-35-for-coastal-service-1200x648.webp 1200w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-duplex-butterfly-valve-for-seawater-applications-featuring-Duplex-2205-material-with-a-PREN-of-35-for-coastal-service-500x270.webp 500w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-duplex-butterfly-valve-for-seawater-applications-featuring-Duplex-2205-material-with-a-PREN-of-35-for-coastal-service-300x162.webp 300w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-duplex-butterfly-valve-for-seawater-applications-featuring-Duplex-2205-material-with-a-PREN-of-35-for-coastal-service-768x415.webp 768w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-duplex-butterfly-valve-for-seawater-applications-featuring-Duplex-2205-material-with-a-PREN-of-35-for-coastal-service-18x10.webp 18w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-duplex-butterfly-valve-for-seawater-applications-featuring-Duplex-2205-material-with-a-PREN-of-35-for-coastal-service-139x75.webp 139w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-duplex-butterfly-valve-for-seawater-applications-featuring-Duplex-2205-material-with-a-PREN-of-35-for-coastal-service-480x259.webp 480w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-duplex-butterfly-valve-for-seawater-applications-featuring-Duplex-2205-material-with-a-PREN-of-35-for-coastal-service-800x432.webp 800w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-duplex-butterfly-valve-for-seawater-applications-featuring-Duplex-2205-material-with-a-PREN-of-35-for-coastal-service.webp 1376w\" sizes=\"auto, (max-width:767px) 480px, (max-width:1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cont\u00e9m cromo 22%, n\u00edquel 5% e molibd\u00eanio 3%.<\/li>\n\n\n\n<li>Atinge um PREN de aproximadamente 35.<\/li>\n\n\n\n<li>A resist\u00eancia \u00e0 tra\u00e7\u00e3o \u00e9 aproximadamente o dobro da do a\u00e7o inoxid\u00e1vel 316L (~620 MPa contra ~480 MPa).<\/li>\n\n\n\n<li>Trata \u00e1gua salobra, circuitos de \u00e1gua de refrigera\u00e7\u00e3o e capta\u00e7\u00e3o costeira de baixa salinidade.<\/li>\n\n\n\n<li>Uma op\u00e7\u00e3o com boa rela\u00e7\u00e3o custo-benef\u00edcio quando o contato com a \u00e1gua do mar \u00e9 intermitente ou os n\u00edveis de cloreto permanecem abaixo de 10.000 ppm.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Super Duplex 2507 (UNS S32750: ASTM A182 F53)<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"651\" src=\"https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-super-duplex-butterfly-valve-designed-for-high-pressure-seawater-service-featuring-2507-alloy-with-a-PREN-of-43-for-deepsea-corrosion-resistance-1200x651.webp\" alt=\"Uma v\u00e1lvula borboleta super duplex projetada para servi\u00e7o em \u00e1gua do mar de alta press\u00e3o, fabricada em liga 2507 com PREN 43 para resist\u00eancia \u00e0 corros\u00e3o em \u00e1guas profundas.\" class=\"wp-image-2522\" srcset=\"https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-super-duplex-butterfly-valve-designed-for-high-pressure-seawater-service-featuring-2507-alloy-with-a-PREN-of-43-for-deepsea-corrosion-resistance-1200x651.webp 1200w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-super-duplex-butterfly-valve-designed-for-high-pressure-seawater-service-featuring-2507-alloy-with-a-PREN-of-43-for-deepsea-corrosion-resistance-500x271.webp 500w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-super-duplex-butterfly-valve-designed-for-high-pressure-seawater-service-featuring-2507-alloy-with-a-PREN-of-43-for-deepsea-corrosion-resistance-300x163.webp 300w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-super-duplex-butterfly-valve-designed-for-high-pressure-seawater-service-featuring-2507-alloy-with-a-PREN-of-43-for-deepsea-corrosion-resistance-768x416.webp 768w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-super-duplex-butterfly-valve-designed-for-high-pressure-seawater-service-featuring-2507-alloy-with-a-PREN-of-43-for-deepsea-corrosion-resistance-18x10.webp 18w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-super-duplex-butterfly-valve-designed-for-high-pressure-seawater-service-featuring-2507-alloy-with-a-PREN-of-43-for-deepsea-corrosion-resistance-138x75.webp 138w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-super-duplex-butterfly-valve-designed-for-high-pressure-seawater-service-featuring-2507-alloy-with-a-PREN-of-43-for-deepsea-corrosion-resistance-480x260.webp 480w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-super-duplex-butterfly-valve-designed-for-high-pressure-seawater-service-featuring-2507-alloy-with-a-PREN-of-43-for-deepsea-corrosion-resistance-800x434.webp 800w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/A-super-duplex-butterfly-valve-designed-for-high-pressure-seawater-service-featuring-2507-alloy-with-a-PREN-of-43-for-deepsea-corrosion-resistance.webp 1376w\" sizes=\"auto, (max-width:767px) 480px, (max-width:1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cont\u00e9m 25% de cromo, 7% de n\u00edquel, 4% de molibd\u00eanio e 0,3% de nitrog\u00eanio.<\/li>\n\n\n\n<li>Atinge um PREN de aproximadamente 43, o que atende ao limite \u226540 para servi\u00e7o cont\u00ednuo em \u00e1gua do mar.<\/li>\n\n\n\n<li>A resist\u00eancia ao escoamento atinge aproximadamente 550 MPa, permitindo se\u00e7\u00f5es de parede mais finas e conjuntos mais leves.<\/li>\n\n\n\n<li>Preferencialmente utilizado em sistemas de alimenta\u00e7\u00e3o de alta press\u00e3o para osmose reversa (OR), operando entre 55 e 80 bar.<\/li>\n\n\n\n<li>Material padr\u00e3o para sistemas de eleva\u00e7\u00e3o de \u00e1gua do mar em alto-mar, redes de \u00e1gua de combate a inc\u00eandio e linhas de inje\u00e7\u00e3o de \u00e1gua produzida.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>O a\u00e7o inoxid\u00e1vel duplex \u00e9 adequado para \u00e1gua do mar?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sim, os graus duplex e super duplex foram desenvolvidos especificamente para ambientes ricos em cloreto e \u00e1gua do mar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.tgvalve.com\/pt\/product\/metal-to-metal-triple-offset-butterfly-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\">V\u00e1lvulas padr\u00e3o em a\u00e7o inoxid\u00e1vel 316L<\/a> A corros\u00e3o come\u00e7a acima de 1.000 ppm de cloreto em temperaturas elevadas. A \u00e1gua salina cont\u00e9m entre 19.000 e 35.000 ppm de cloreto. Portanto, n\u00e3o \u00e9 adequada para uso direto com \u00e1gua do mar na maioria das aplica\u00e7\u00f5es industriais.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A solu\u00e7\u00e3o \u00e9 usar o duplex 2205 ou o super duplex 2507, dependendo do n\u00edvel de salinidade.&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O Duplex 2205 eleva o padr\u00e3o para PREN ~35. Ele abrange \u00e1guas salobras e capta\u00e7\u00f5es costeiras com baixa salinidade. No entanto, para \u00e1gua do mar com salinidade total, especialmente em temperaturas acima de 25\u00b0C, os engenheiros exigem PREN \u2265 40.<\/li>\n\n\n\n<li>O a\u00e7o super duplex 2507 tem classifica\u00e7\u00e3o PREN ~43. Ele resiste \u00e0 corros\u00e3o sob tens\u00e3o induzida por cloretos, um modo de falha comum em a\u00e7os como o 304 e o 316L.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Compara\u00e7\u00e3o da resist\u00eancia \u00e0 corros\u00e3o: materiais comuns para v\u00e1lvulas em \u00e1gua do mar.<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A tabela abaixo compara os materiais de v\u00e1lvulas mais comuns usados em sistemas de \u00e1gua do mar e dessaliniza\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Um valor de PREN mais alto significa melhor resist\u00eancia \u00e0 corros\u00e3o por pites induzida por cloretos.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Material<\/strong><\/th><th><strong>Cr (<\/strong><strong>Cromo<\/strong><strong>) %<\/strong><\/th><th><strong>Mo (<\/strong><strong>Molibd\u00eanio<\/strong><strong>) %<\/strong><\/th><th><strong>PREN<\/strong><\/th><th><strong>Adequa\u00e7\u00e3o para \u00e1gua do mar<\/strong><\/th><\/tr><\/thead><tbody><tr><td>A\u00e7o inoxid\u00e1vel 316L<\/td><td>16 a 18<\/td><td>2 a 3<\/td><td>~24<\/td><td>N\u00e3o recomendado: risco de corros\u00e3o por pite acima de 1.000 ppm de cloreto.<\/td><\/tr><tr><td>Duplex 2205<\/td><td>22<\/td><td>3<\/td><td>~35<\/td><td>Adequado para capta\u00e7\u00e3o em \u00e1gua salobra e costeira com baixa salinidade.<\/td><\/tr><tr><td>Super Duplex 2507<\/td><td>25<\/td><td>4<\/td><td>~43<\/td><td>Indicado para servi\u00e7os com \u00e1gua do mar e salmoura em sua concentra\u00e7\u00e3o m\u00e1xima.<\/td><\/tr><tr><td>Tit\u00e2nio Grau 2<\/td><td>\u2014<\/td><td>\u2014<\/td><td>N \/ D<\/td><td>Resist\u00eancia superior: custo significativamente maior<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Principais vantagens das v\u00e1lvulas duplex e superduplex<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"656\" src=\"https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/An-infographic-that-explains-why-engineers-choose-seawater-grade-valves-1200x656.webp\" alt=\"Um infogr\u00e1fico que explica por que os engenheiros escolhem v\u00e1lvulas pr\u00f3prias para \u00e1gua do mar.\" class=\"wp-image-2523\" srcset=\"https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/An-infographic-that-explains-why-engineers-choose-seawater-grade-valves-1200x656.webp 1200w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/An-infographic-that-explains-why-engineers-choose-seawater-grade-valves-500x273.webp 500w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/An-infographic-that-explains-why-engineers-choose-seawater-grade-valves-300x164.webp 300w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/An-infographic-that-explains-why-engineers-choose-seawater-grade-valves-768x420.webp 768w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/An-infographic-that-explains-why-engineers-choose-seawater-grade-valves-1536x839.webp 1536w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/An-infographic-that-explains-why-engineers-choose-seawater-grade-valves-18x10.webp 18w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/An-infographic-that-explains-why-engineers-choose-seawater-grade-valves-137x75.webp 137w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/An-infographic-that-explains-why-engineers-choose-seawater-grade-valves-480x262.webp 480w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/An-infographic-that-explains-why-engineers-choose-seawater-grade-valves-800x437.webp 800w, https:\/\/www.tgvalve.com\/wp-content\/uploads\/2026\/07\/An-infographic-that-explains-why-engineers-choose-seawater-grade-valves.webp 1999w\" sizes=\"auto, (max-width:767px) 480px, (max-width:1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Os engenheiros especificam v\u00e1lvulas para servi\u00e7o em \u00e1gua do mar pelos seguintes motivos:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Resist\u00eancia \u00e0 corros\u00e3o por pites e frestas<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">O alto teor de molibd\u00eanio e nitrog\u00eanio impede o ataque de cloretos nas bordas do disco, na haste e nas faces da sede. Essas s\u00e3o as \u00e1reas mais vulner\u00e1veis \u00e0 corros\u00e3o por frestas em conjuntos de v\u00e1lvulas.<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>Alta resist\u00eancia mec\u00e2nica<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">A resist\u00eancia ao escoamento do a\u00e7o duplex 2205 \u00e9 de aproximadamente 450 MPa, em compara\u00e7\u00e3o com os 170 MPa do 316L. Isso permite que os engenheiros projetem componentes com paredes mais finas sem reduzir a capacidade de press\u00e3o, diminuindo assim o peso em aplica\u00e7\u00f5es de superf\u00edcie em plataformas offshore.<\/p>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>Resist\u00eancia \u00e0 fissura\u00e7\u00e3o por corros\u00e3o sob tens\u00e3o<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">A fase ferr\u00edtica no a\u00e7o duplex interrompe a propaga\u00e7\u00e3o de trincas. Os a\u00e7os austen\u00edticos puros trincam sob a combina\u00e7\u00e3o de tens\u00e3o de tra\u00e7\u00e3o e exposi\u00e7\u00e3o a cloretos. Os a\u00e7os duplex n\u00e3o trincam, o que representa uma vantagem crucial em tubula\u00e7\u00f5es de dessaliniza\u00e7\u00e3o de alta press\u00e3o.<\/p>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>Menor custo do ciclo de vida<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Em aplica\u00e7\u00f5es que envolvem \u00e1gua do mar, uma v\u00e1lvula borboleta para \u00e1gua do mar pode durar o dobro da vers\u00e3o em a\u00e7o inoxid\u00e1vel 316L. A redu\u00e7\u00e3o no custo de substitui\u00e7\u00e3o e no tempo de inatividade \u00e9 importante em locais offshore onde a manuten\u00e7\u00e3o n\u00e3o \u00e9 facilmente acess\u00edvel ou \u00e9 muito cara.&nbsp;<\/p>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li><strong>Ampla faixa de temperatura operacional<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">As classes 2205 e 2507 apresentam excelente desempenho desde temperaturas criog\u00eanicas at\u00e9 300 \u00b0C. Essa faixa abrange os processos de pr\u00e9-tratamento, osmose reversa e p\u00f3s-tratamento em uma mesma planta de dessaliniza\u00e7\u00e3o, sem qualquer altera\u00e7\u00e3o nas especifica\u00e7\u00f5es do material da v\u00e1lvula.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Aplica\u00e7\u00e3o de v\u00e1lvulas pr\u00f3prias para \u00e1gua do mar em sistemas de \u00e1gua do mar<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Uma v\u00e1lvula pr\u00f3pria para \u00e1gua do mar \u00e9 utilizada em diversos tipos de sistemas de \u00e1gua do mar. Aqui est\u00e3o as tr\u00eas principais categorias de projetos.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Usinas de dessaliniza\u00e7\u00e3o de \u00e1gua do mar<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">As usinas de dessaliniza\u00e7\u00e3o representam os maiores desafios. Os sistemas de osmose reversa de alta press\u00e3o operam entre 55 e 80 bar com salmoura contendo mais de 40.000 ppm de cloreto. As v\u00e1lvulas borboleta controlam o fluxo em todas as etapas: desde a capta\u00e7\u00e3o e filtra\u00e7\u00e3o da \u00e1gua do mar at\u00e9 a alimenta\u00e7\u00e3o de alta press\u00e3o e a descarga da salmoura. O a\u00e7o super duplex 2507 \u00e9 a especifica\u00e7\u00e3o padr\u00e3o para v\u00e1lvulas de alta press\u00e3o e do lado da salmoura.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Engenharia Offshore e Submarina<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">As plataformas offshore utilizam \u00e1gua do mar para sistemas de combate a inc\u00eandio, tratamento de \u00e1gua de lastro e inje\u00e7\u00e3o de \u00e1gua produzida. Esses ambientes operam em regime cont\u00ednuo, com imers\u00e3o total ou em zonas de respingos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O Superduplex 2507 \u00e9 o material exigido para v\u00e1lvulas de \u00e1gua do mar, de acordo com a especifica\u00e7\u00e3o NORSOK MDS D45. Isso \u00e9 importante para projetos no Mar do Norte e no Golfo P\u00e9rsico.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Capta\u00e7\u00e3o e descarga de \u00e1gua costeira<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Instala\u00e7\u00f5es costeiras municipais e industriais utilizam v\u00e1lvulas borboleta de grande di\u00e2metro para capta\u00e7\u00e3o de \u00e1gua do mar e linhas de refrigera\u00e7\u00e3o. Estas v\u00e1lvulas suportam altos fluxos em baixa press\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o duplex 2205 \u00e9 adequado para a maioria das capta\u00e7\u00f5es de \u00e1gua costeiras. O a\u00e7o super duplex 2507 \u00e9 mais indicado para usinas hidrel\u00e9tricas, onde as altas temperaturas aumentam o risco de corros\u00e3o.<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <title>Destaque do produto Hero<\/title>\n  <style>\n    \/* Added !important tags to prevent WordPress themes from injecting unwanted underlines *\/\n    .hero-card, .hero-card:hover, .hero-card:focus {\n      display: flex;\n      flex-wrap: wrap;\n      align-items: center;\n      background: #f7f8fa;\n      border-radius: 16px;\n      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);\n      padding: 24px;\n      max-width: 900px;\n      margin: 40px auto;\n      font-family: 'Poppins', Arial, sans-serif;\n      text-decoration: none !important; \n      color: inherit;\n    }\n\n    .hero-image {\n      width: 220px;\n      height: auto;\n      border-radius: 12px;\n      object-fit: cover;\n      flex-shrink: 0;\n    }\n\n    .hero-content {\n      padding-left: 24px;\n      flex: 1;\n      min-width: 260px;\n    }\n\n    .hero-title {\n      font-size: 1.6rem;\n      font-weight: bold;\n      margin-bottom: 12px;\n      color: #222;\n      font-family: 'Poppins', sans-serif; \n    }\n\n    .hero-description {\n      font-size: 1rem;\n      color: #555;\n      margin-bottom: 18px;\n      line-height: 1.6;\n    }\n\n    .hero-link {\n      display: inline-block;\n      padding: 10px 20px;\n      background-color: #0066cc;\n      color: #fff !important;\n      text-decoration: none !important;\n      border-radius: 8px;\n      font-weight: bold;\n      transition: background 0.2s ease-in-out;\n    }\n\n    .hero-link:hover {\n      background-color: #004c99;\n    }\n\n    @media (max-width: 640px) {\n      .hero-card {\n        flex-direction: column;\n        text-align: center;\n      }\n\n      .hero-content {\n        padding-left: 0;\n        padding-top: 20px;\n      }\n\n      .hero-image {\n        width: 100%;\n        max-width: 280px;\n      }\n    }\n  <\/style>\n<\/head>\n<body>\n\n<a class=\"hero-card\" href=\"https:\/\/www.tgvalve.com\/pt\/product\/wafer-concentric-butterfly-valve\/\" target=\"_blank\">\n  <img decoding=\"async\" class=\"hero-image\" src=\"https:\/\/tgvalve.b-cdn.net\/wp-content\/uploads\/2025\/06\/Wafer-Concentric-Butterfly-Valve-480x480.webp\" alt=\"V\u00e1lvula borboleta conc\u00eantrica tipo wafer\">\n  <div class=\"hero-content\">\n    <div class=\"hero-title\">V\u00e1lvula borboleta conc\u00eantrica tipo wafer<\/div>\n    <div class=\"hero-description\">\n      <strong>Estrutura:<\/strong> Selagem central<br>\n      <strong>Aplicativo:<\/strong> Uso industrial, \u00e1gua Uso industrial, uso dom\u00e9stico\n    <\/div>\n    <span class=\"hero-link\">Ver produto<\/span>\n  <\/div>\n<\/a>\n\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclus\u00e3o<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A \u00e1gua do mar \u00e9 um meio agressivo que pode danificar as v\u00e1lvulas convencionais de a\u00e7o inoxid\u00e1vel. Existem dois tipos de v\u00e1lvulas capazes de lidar com ela: 2205 <strong>v\u00e1lvulas duplex<\/strong> e 2507 super <strong>v\u00e1lvulas borboleta duplex<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o inoxid\u00e1vel duplex \u00e9 adequado para \u00e1gua do mar? Sim, \u00e9. Mas isso deve ser avaliado com base no teor de cloro da \u00e1gua do mar, na temperatura e na classe de press\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Se voc\u00ea usar \u00e1gua do mar em condi\u00e7\u00f5es normais, sem alto teor de cloreto e sem altas temperaturas, o a\u00e7o duplex \u00e9 uma op\u00e7\u00e3o razo\u00e1vel. Caso precise de maior resist\u00eancia \u00e0 corros\u00e3o em ambientes agressivos, escolha o a\u00e7o superduplex.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.tgvalve.com\/pt\/contact\/\" target=\"_blank\" rel=\"noreferrer noopener\">V\u00e1lvula TG<\/a> Produzimos e vendemos v\u00e1lvulas borboleta nas classes 2205 e 2507, que funcionam perfeitamente com \u00e1gua do mar. Nossos especialistas conhecem todos os detalhes da sele\u00e7\u00e3o adequada de materiais para dessaliniza\u00e7\u00e3o de \u00e1gua do mar, projetos offshore e projetos de uso de \u00e1guas costeiras.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nossa empresa possui as certifica\u00e7\u00f5es ISO 9001, API 609 e CE.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/www.tgvalve.com\/pt\/contact\/\" style=\"background-color:#1b4ca2\" target=\"_blank\" rel=\"noreferrer noopener\">Obtenha um or\u00e7amento gratuito<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Duplex and super duplex valves are the standard choice for seawater application due to their fabrication with stainless steel and duplex material. The alloy used in<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":2520,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2519","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-butterfly-valve"],"_links":{"self":[{"href":"https:\/\/www.tgvalve.com\/pt\/wp-json\/wp\/v2\/posts\/2519","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tgvalve.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tgvalve.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tgvalve.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tgvalve.com\/pt\/wp-json\/wp\/v2\/comments?post=2519"}],"version-history":[{"count":1,"href":"https:\/\/www.tgvalve.com\/pt\/wp-json\/wp\/v2\/posts\/2519\/revisions"}],"predecessor-version":[{"id":2524,"href":"https:\/\/www.tgvalve.com\/pt\/wp-json\/wp\/v2\/posts\/2519\/revisions\/2524"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tgvalve.com\/pt\/wp-json\/wp\/v2\/media\/2520"}],"wp:attachment":[{"href":"https:\/\/www.tgvalve.com\/pt\/wp-json\/wp\/v2\/media?parent=2519"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tgvalve.com\/pt\/wp-json\/wp\/v2\/categories?post=2519"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tgvalve.com\/pt\/wp-json\/wp\/v2\/tags?post=2519"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}