{"id":10688,"date":"2022-11-25T08:38:01","date_gmt":"2022-11-25T00:38:01","guid":{"rendered":"https:\/\/limegreen-okapi-448594.hostingersite.com\/?p=10688"},"modified":"2022-11-25T08:38:05","modified_gmt":"2022-11-25T00:38:05","slug":"valve-sealing-materials","status":"publish","type":"post","link":"https:\/\/raymonvalve.com\/pt\/blog\/valve-sealing-materials\/","title":{"rendered":"Materiais de veda\u00e7\u00e3o da v\u00e1lvula<\/strong>"},"content":{"rendered":"

O que s\u00e3o materiais de veda\u00e7\u00e3o de v\u00e1lvula?<\/strong><\/h2>\n\n\n\n

O material de veda\u00e7\u00e3o \u00e9, na verdade, a superf\u00edcie muito cr\u00edtica da v\u00e1lvula. A qualidade do material de veda\u00e7\u00e3o afeta a vida \u00fatil das v\u00e1lvulas. O material de veda\u00e7\u00e3o \u00e9, na verdade, um fator muito importante para garantir a manuten\u00e7\u00e3o da qualidade da superf\u00edcie de veda\u00e7\u00e3o.<\/p>\n\n\n\n

As veda\u00e7\u00f5es da v\u00e1lvula s\u00e3o a parte chave para determinar o desempenho da v\u00e1lvula. Fatores como atrito, flash, corros\u00e3o, oxida\u00e7\u00e3o e outros devem ser considerados ao selecionar os materiais da superf\u00edcie de veda\u00e7\u00e3o. As veda\u00e7\u00f5es de v\u00e1lvula s\u00e3o divididas em 2 categorias: uma \u00e9 conhecida como veda\u00e7\u00e3o macia, que tamb\u00e9m \u00e9 conhecida como borracha, incluindo borracha de fluoro e butano. A outra e a segunda s\u00e3o veda\u00e7\u00f5es duras, que incluem ligas de cobre e s\u00e3o usadas para v\u00e1lvulas de baixa press\u00e3o, ligas \u00e0 base de n\u00edquel, ligas de sat\u00e9lite e a\u00e7os inoxid\u00e1veis cromados.<\/p>\n\n\n\n

Top 10 materiais de veda\u00e7\u00e3o de v\u00e1lvula<\/strong><\/h2>\n\n\n\n

1.<\/strong>   Borracha sint\u00e9tica<\/strong><\/h3>\n\n\n\n

A borracha sint\u00e9tica \u00e9 superior \u00e0 borracha natural em sua resist\u00eancia \u00e0 temperatura e resist\u00eancia \u00e0 corros\u00e3o. A temperatura de opera\u00e7\u00e3o da borracha sint\u00e9tica \u00e9 inferior a 150 graus Celsius. A borracha natural \u00e9 inferior a 60 graus Celsius. As borrachas s\u00e3o usadas para v\u00e1lvulas de bloqueio, v\u00e1lvulas borboleta, v\u00e1lvulas de reten\u00e7\u00e3o, v\u00e1lvulas de pin\u00e7a e outras v\u00e1lvulas cuja press\u00e3o \u00e9 menor que 1 MPa.<\/p>\n\n\n\n

2.<\/strong>   Nylon<\/strong><\/h3>\n\n\n\n

O nylon possui caracter\u00edsticas de boa resist\u00eancia \u00e0 corros\u00e3o e baixo coeficiente de atrito. O nylon \u00e9 mais usado para v\u00e1lvulas globo e v\u00e1lvulas esfera com temperatura inferior a 90 graus Celsius. A press\u00e3o nominal \u00e9 menor que 32 MPa.<\/p>\n\n\n\n

3.<\/strong>   Teflon<\/strong><\/h3>\n\n\n\n

O Teflon \u00e9 amplamente utilizado em v\u00e1lvulas gaveta, v\u00e1lvulas de bloqueio, v\u00e1lvulas esfera, etc. Ele suporta temperaturas acima de 232 graus Celsius e press\u00e3o nominal de 6,4 MPa.<\/p>\n\n\n\n

4.<\/strong>   Ferro fundido<\/strong><\/h3>\n\n\n\n

O ferro fundido \u00e9 utilizado em v\u00e1lvulas globo, v\u00e1lvulas gaveta e v\u00e1lvulas de plug para transporte de \u00f3leo e g\u00e1s. A temperatura de opera\u00e7\u00e3o \u00e9 superior a 100 graus Celsius e a press\u00e3o nominal \u00e9 de 1,6 MPa.<\/p>\n\n\n\n

5.<\/strong>   Liga Babbitt<\/strong><\/h3>\n\n\n\n

A liga Babbitt \u00e9 utilizada em v\u00e1lvulas de bloqueio para am\u00f4nia. A temperatura de opera\u00e7\u00e3o varia entre -70 e -50 graus Celsius e a press\u00e3o nominal \u00e9 de 2,5 MPa.<\/p>\n\n\n\n

6.<\/strong>   Liga de cobre<\/strong><\/h3>\n\n\n\n

As ligas de cobre comuns incluem bronze estan\u00edfero 6-6-3 e lat\u00e3o mangan\u00eas 58-2-2. As ligas de cobre possuem excelente resist\u00eancia ao desgaste e s\u00e3o adequadas para vapor e \u00e1gua. A temperatura de opera\u00e7\u00e3o \u00e9 superior a 200 graus Celsius e a press\u00e3o nominal \u00e9 de 1,6 MPa. S\u00e3o comumente usadas em v\u00e1lvulas de plug, v\u00e1lvulas globo, v\u00e1lvulas gaveta e v\u00e1lvulas de reten\u00e7\u00e3o, etc.<\/p>\n\n\n\n

7.<\/strong>   A\u00e7o inoxid\u00e1vel cromo n\u00edquel tit\u00e2nio<\/strong><\/h3>\n\n\n\n

A liga comum de a\u00e7o inoxid\u00e1vel cromo n\u00edquel tit\u00e2nio \u00e9 1 Cr18Ni9ti. Possui boa resist\u00eancia \u00e0 corros\u00e3o, ao calor e \u00e0 eros\u00e3o. \u00c9 adequada para fluidos como \u00e1cido n\u00edtrico e vapor. S\u00e3o utilizadas em v\u00e1lvulas esfera e v\u00e1lvulas de bloqueio.<\/p>\n\n\n\n

8.<\/strong>   Boroniza\u00e7\u00e3o<\/strong><\/h3>\n\n\n\n

A boroniza\u00e7\u00e3o \u00e9 um processo aplicado diretamente no corpo ou material da v\u00e1lvula na superf\u00edcie de veda\u00e7\u00e3o. A superf\u00edcie tratada por boroniza\u00e7\u00e3o confere excelente resist\u00eancia ao desgaste \u00e0 superf\u00edcie de veda\u00e7\u00e3o. \u00c9 utilizada em v\u00e1lvulas de dreno de usinas de energia.<\/p>","protected":false},"excerpt":{"rendered":"

What are Valve sealing materials? The sealing material is actually the very critical surface of the […]<\/p>\n","protected":false},"author":1,"featured_media":7558,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-10688","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/posts\/10688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/comments?post=10688"}],"version-history":[{"count":1,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/posts\/10688\/revisions"}],"predecessor-version":[{"id":10689,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/posts\/10688\/revisions\/10689"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/media\/7558"}],"wp:attachment":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/media?parent=10688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/categories?post=10688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/tags?post=10688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}