{"id":9189,"date":"2021-12-30T08:08:50","date_gmt":"2021-12-30T08:08:50","guid":{"rendered":"https:\/\/zecovalve.com\/a182-f304-lift-check-valve-high-quality-piston-check-valve-titanium-ball-valves-supplier-chinacryogenic-globe-valve-manufacturers-chinac95800-butterfly-valve-in-chinabellow-sealed-globe-valve-fa.html"},"modified":"2022-08-03T05:48:34","modified_gmt":"2022-08-03T05:48:34","slug":"a182-f304-lift-check-valve-high-quality-piston-check-valve-titanium-ball-valves-supplier-chinacryogenic-globe-valve-manufacturers-chinac95800-butterfly-valve-in-chinabellow-sealed-globe-valve-fa","status":"publish","type":"post","link":"https:\/\/zecovalve.com\/pt\/a182-f304-lift-check-valve-high-quality-piston-check-valve-titanium-ball-valves-supplier-chinacryogenic-globe-valve-manufacturers-chinac95800-butterfly-valve-in-chinabellow-sealed-globe-valve-fa.html","title":{"rendered":"V\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o e v\u00e1lvula de reten\u00e7\u00e3o de pist\u00e3o"},"content":{"rendered":"<p><span style=\"font-family: Arial; font-weight: bold; font-size: 10.5pt;\">V\u00e1lvula de reten\u00e7\u00e3o: a v\u00e1lvula mais importante no sistema de processamento<\/span><\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-family: Arial;\">Principais fun\u00e7\u00f5es e fun\u00e7\u00f5es da v\u00e1lvula de reten\u00e7\u00e3o:<\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><span style=\"font-family: Arial;\">Eles s\u00f3 permitem que o fluido flua em uma dire\u00e7\u00e3o.<\/span><\/li><li><span style=\"font-family: Arial;\">Eles evitam refluxo ou sifonamento.<\/span><\/li><li><span style=\"font-family: Arial;\">Eles mant\u00eam a press\u00e3o no sistema.<\/span><\/li><li><span style=\"font-family: Arial;\">Eles protegem outros equipamentos, como bombas e caixas d\u2019\u00e1gua.<\/span><\/li><li><span style=\"font-family: Arial;\">V\u00e1lvula de reten\u00e7\u00e3o guiada pelo centro com superalimentador a montante<\/span><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-family: Arial; font-weight: bold;\">Tipos de v\u00e1lvulas de reten\u00e7\u00e3o<\/span><\/h2>\n\n\n\n<p><span style=\"font-family: Arial;\">Existem muitos estilos de v\u00e1lvulas de reten\u00e7\u00e3o, elas usam diferentes mecanismos para evitar o refluxo, incluindo discos, esferas, pist\u00f5es e outras formas. O fluxo pode ser reto, angular ou elevado. Cada tipo de v\u00e1lvula de reten\u00e7\u00e3o tem suas vantagens. As v\u00e1lvulas de reten\u00e7\u00e3o girat\u00f3rias permitem o uso de pigs atrav\u00e9s da tubula\u00e7\u00e3o para limpar ou inspecionar a tubula\u00e7\u00e3o. Outros apresentam melhor desempenho em fluxo vertical. Alguns podem ser reparados online. Alguns cont\u00eam materiais s\u00f3lidos ou fibrosos que podem suportar o fluxo.<\/span><\/p>\n\n\n\n<p><span style=\"font-family: Arial;\">Os acess\u00f3rios podem ajustar o desempenho da v\u00e1lvula. V\u00e1rias combina\u00e7\u00f5es de alavancas e contrapesos, molas, almofadas de ar ou amortecedores podem ajudar a controlar a velocidade de fechamento da v\u00e1lvula para corresponder \u00e0 aplica\u00e7\u00e3o e evitar problemas de batida da v\u00e1lvula e golpe de ar\u00edete. Outros acess\u00f3rios, como indicadores de posi\u00e7\u00e3o, fornecem informa\u00e7\u00f5es operacionais. Em muitas aplica\u00e7\u00f5es, \u00e9 melhor incluir uma retrolavagem<br>dispositivo para remover quaisquer detritos acumulados na parte inferior da v\u00e1lvula.<\/span><span style=\"font-family: Arial;\"><\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span style=\"font-family: Arial;\"><strong><a href=\"https:\/\/zecovalve.com\/pt\/produto\/stainless-steel-swing-check-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\"><mark style=\"background-color:var(--base)\" class=\"has-inline-color has-contrast-2-color\">V\u00e1lvula de reten\u00e7\u00e3o oscilante<\/mark><\/a><\/strong><\/span><\/h3>\n\n\n\n<p>Uma v\u00e1lvula de reten\u00e7\u00e3o oscilante b\u00e1sica consiste em um corpo de v\u00e1lvula, um castelo e um disco conectado a uma dobradi\u00e7a. O disco se afasta da sede da v\u00e1lvula para permitir o fluxo na dire\u00e7\u00e3o direta e retorna \u00e0 sede da v\u00e1lvula quando o fluxo a montante \u00e9 interrompido, para evitar o refluxo.<\/p>\n\n\n\n<p>O disco em uma v\u00e1lvula de reten\u00e7\u00e3o do tipo oscilante n\u00e3o \u00e9 guiado quando abre ou fecha totalmente. Existem muitos designs de discos e sedes dispon\u00edveis, para atender aos requisitos de diferentes aplica\u00e7\u00f5es. A v\u00e1lvula permite fluxo total e desobstru\u00eddo e fecha automaticamente conforme a press\u00e3o diminui. Estas v\u00e1lvulas s\u00e3o totalmente fechadas quando a vaz\u00e3o chega a zero, para evitar refluxo. A turbul\u00eancia e a queda de press\u00e3o na v\u00e1lvula s\u00e3o muito baixas.<span style=\"font-family: Arial;\"><\/span><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/flange-check-valve.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o de flange\" class=\"wp-image-16338\" width=\"400\" height=\"300\" srcset=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/flange-check-valve.jpg 800w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/flange-check-valve-300x225.jpg 300w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/flange-check-valve-768x576.jpg 768w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/flange-check-valve-600x450.jpg 600w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><span style=\"font-family: Arial;\"><strong><a href=\"https:\/\/zecovalve.com\/pt\/what-is-an-axial-flow-silent-check-valve.html\/\" target=\"_blank\" rel=\"noreferrer noopener\"><mark style=\"background-color:var(--base)\" class=\"has-inline-color has-contrast-2-color\">V\u00e1lvula de reten\u00e7\u00e3o de fluxo axial<\/mark><\/a><\/strong><\/span><\/h3>\n\n\n\n<p>O objetivo principal de uma v\u00e1lvula de reten\u00e7\u00e3o de fluxo axial \u00e9 permitir o fluxo em uma dire\u00e7\u00e3o enquanto pro\u00edbe ou interrompe o fluxo na dire\u00e7\u00e3o oposta. Normalmente fica estacion\u00e1rio na posi\u00e7\u00e3o fechada. O desempenho das v\u00e1lvulas de reten\u00e7\u00e3o axiais em termos de baixa perda de press\u00e3o, opera\u00e7\u00e3o est\u00e1vel e comportamento din\u00e2mico desempenha um papel vital em aplica\u00e7\u00f5es de reten\u00e7\u00e3o cr\u00edticas, como a prote\u00e7\u00e3o de equipamentos e sistemas rotativos.<span style=\"font-family: Arial;\"><\/span><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2021\/12\/non-slam-check-valve1.png\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o axial\" class=\"wp-image-15759\" width=\"450\" height=\"317\" srcset=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2021\/12\/non-slam-check-valve1.png 899w, https:\/\/zecovalve.com\/wp-content\/uploads\/2021\/12\/non-slam-check-valve1-600x423.png 600w, https:\/\/zecovalve.com\/wp-content\/uploads\/2021\/12\/non-slam-check-valve1-300x212.png 300w, https:\/\/zecovalve.com\/wp-content\/uploads\/2021\/12\/non-slam-check-valve1-768x542.png 768w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><span style=\"font-family: Arial;\">V\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o<\/span><\/h3>\n\n\n\n<p>Este tipo de v\u00e1lvula \u00e9 t\u00edpico em aplica\u00e7\u00f5es que requerem servi\u00e7o de alta press\u00e3o. Eficazes com fluxo de alta velocidade, as v\u00e1lvulas de reten\u00e7\u00e3o de eleva\u00e7\u00e3o podem ser instaladas horizontal ou verticalmente (em tubula\u00e7\u00f5es com fluxo ascendente). Os tipos de v\u00e1lvulas de reten\u00e7\u00e3o de eleva\u00e7\u00e3o incluem o tipo pist\u00e3o e o tipo esfera. Este tipo de v\u00e1lvula pode ser mais resistente a vazamentos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-family: Arial;\">V\u00e1lvulas adequadas para o trabalho<\/span><\/h2>\n\n\n\n<p><span style=\"font-family: Arial;\">Como o fluxo do fluido abre a v\u00e1lvula de reten\u00e7\u00e3o, \u00e9 importante compreender o fluido e suas caracter\u00edsticas. O fluido \u00e9 l\u00edquido, gasoso ou multif\u00e1sico - s\u00f3lido em uma corrente l\u00edquida ou l\u00edquido em uma corrente gasosa? Qual \u00e9 a taxa de fluxo de volume normal? O fluxo \u00e9 horizontal ou vertical? Para cima ou para baixo? Qual ser\u00e1 a temperatura e a press\u00e3o do fluxo? Quais s\u00e3o as propriedades f\u00edsicas do fluido, como densidade e viscosidade? Quais s\u00e3o as propriedades qu\u00edmicas do fluido, como pH e press\u00e3o de vapor? \u00c9 corrosivo? \u00c9 abrasivo?<\/span><\/p>\n\n\n\n<p><span style=\"font-family: Arial;\">Essas caracter\u00edsticas de fluxo<\/span> <span style=\"font-family: Arial;\">determine qual estilo de v\u00e1lvula de reten\u00e7\u00e3o pode completar o trabalho, bem como quaisquer requisitos especiais de material para a v\u00e1lvula de reten\u00e7\u00e3o e o interno da v\u00e1lvula.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-family: Arial;\">E se a v\u00e1lvula de reten\u00e7\u00e3o for do tamanho errado<\/span>?<span style=\"font-family: Arial;\"><\/span><\/h2>\n\n\n\n<p><span style=\"font-family: Arial;\">Uma v\u00e1lvula de reten\u00e7\u00e3o muito grande resulta em uma vaz\u00e3o baixa, o que torna imposs\u00edvel manter a v\u00e1lvula aberta o tempo todo. Isso pode causar instabilidade e a v\u00e1lvula pode vibrar ou vibrar. Por outro lado, <\/span>substitui\u00e7\u00e3o frequente de v\u00e1lvula\/carretel e outros desligamentos do sistema devido ao reparo ou substitui\u00e7\u00e3o de v\u00e1lvulas de reten\u00e7\u00e3o, <span style=\"font-family: Arial;\">levar\u00e1 ao desgaste mec\u00e2nico prematuro da v\u00e1lvula e poss\u00edveis custos adicionais de manuten\u00e7\u00e3o.<\/span><\/p>\n\n\n\n<p><span style=\"font-family: Arial;\">Uma v\u00e1lvula de reten\u00e7\u00e3o muito pequena far\u00e1 com que o fluxo atrav\u00e9s da v\u00e1lvula seja muito alto, resultando em perdas desnecess\u00e1rias de alta press\u00e3o no sistema. Tamb\u00e9m pode criar turbul\u00eancia excessiva no fluxo, o que pode causar instabilidade da v\u00e1lvula e aumentar o desgaste mec\u00e2nico, levando a maiores custos de manuten\u00e7\u00e3o. Da mesma forma, uma vaz\u00e3o mais alta atrav\u00e9s de uma v\u00e1lvula muito pequena pode aumentar a corros\u00e3o e o desgaste no interior da v\u00e1lvula.<\/span><\/p>\n\n\n\n<p><span style=\"font-family: Arial;\">As v\u00e1lvulas de reten\u00e7\u00e3o desempenham um papel importante na prote\u00e7\u00e3o de outros componentes do sistema de fluxo. Para completar seu trabalho, cada v\u00e1lvula de reten\u00e7\u00e3o deve ser do tipo adequado para a aplica\u00e7\u00e3o e precisa ser dimensionada corretamente para mant\u00ea-la totalmente aberta na vaz\u00e3o normal de opera\u00e7\u00e3o. A escolha e o tamanho corretos da v\u00e1lvula de reten\u00e7\u00e3o podem proporcionar uma vida \u00fatil longa e sem problemas. Al\u00e9m da v\u00e1lvula de reten\u00e7\u00e3o de giro e da v\u00e1lvula de reten\u00e7\u00e3o de fluxo axial. H\u00e1 outra v\u00e1lvula de reten\u00e7\u00e3o de pist\u00e3o de alta qualidade que foi projetada.<\/span><\/p>\n\n\n\n<!-- Andy:h-related-tags -->\n<h2 id=\"h-related-tags\">Etiquetas relacionadas :<\/h2>\n<!-- \/Andy:h-related-tags -->\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/\">V\u00e1lvula ZECO<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/categoria-do-produto\/gate-valve\/\">Fabricante de v\u00e1lvula gaveta - v\u00e1rios tipos de v\u00e1lvula gaveta<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/categoria-do-produto\/ball-valve\/\">Fabricante de v\u00e1lvula esf\u00e9rica - V\u00e1rios tipos de v\u00e1lvula esf\u00e9rica<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/what-is-an-axial-flow-silent-check-valve.html\/\">O que \u00e9 uma v\u00e1lvula de reten\u00e7\u00e3o axial<\/a>\n\n<\/div>\n\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/tag\/shanghai-pressure-reducing-valve-factory\/\">F\u00e1brica de v\u00e1lvulas redutoras de press\u00e3o de Xangai<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/what-is-the-difference-between-floating-ball-valve-and-trunnion-mounted-ball-valve.html\/\">Diferen\u00e7a entre v\u00e1lvula esf\u00e9rica flutuante e v\u00e1lvula esf\u00e9rica munh\u00e3o<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/thermoplastic-materials-as-valve-seat.html\/\">Materiais termopl\u00e1sticos como sede de v\u00e1lvula esf\u00e9rica e sede de v\u00e1lvula borboleta<\/a>\n\n<\/div>\n\n\n\n<p>Dez artigos antes e depois<\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/bronze-ball-valve-ball-valve-c95800-titanium-ball-valves-supplier-chinacryogenic-globe-valve-manufacturers-chinac95800-butterfly-valve-in-chinabellow-sealed-globe-valve-factoryinconel-625-globe.html\/\">v\u00e1lvula de esfera de bronze, v\u00e1lvula de esfera C95800 - fornecedor de v\u00e1lvulas de esfera de tit\u00e2nio na China, fabricantes de v\u00e1lvulas globo criog\u00eanicas na China, v\u00e1lvula borboleta C95800 na China, f\u00e1brica de v\u00e1lvula globo selada com fole, empresa de v\u00e1lvula globo inconel 625 | Fabricante profissional de v\u00e1lvulas<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/high-pressure-control-valve2500lb-control-valve-titanium-ball-valves-supplier-chinacryogenic-globe-valve-manufacturers-chinac95800-butterfly-valve-in-chinabellow-sealed-globe-valve-factoryincon.html\/\">v\u00e1lvula de controle de alta press\u00e3o, v\u00e1lvula de controle 2500LB - fornecedor de v\u00e1lvulas de esfera de tit\u00e2nio na China, fabricantes de v\u00e1lvula globo criog\u00eanica na China, v\u00e1lvula borboleta C95800 na China, f\u00e1brica de v\u00e1lvula globo selada com fole, empresa de v\u00e1lvula globo inconel 625 | Fabricante profissional de v\u00e1lvulas<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/level-operated-4-butterfly-valveductile-iron-wafer-butterfly-valveviton-lined-butterfly-valveviton-lined-butterfly-valve-made-in-china-titanium-ball-valves-supplier-chinacryogenic-globe-valv.html\/\">V\u00e1lvula borboleta de 4 &quot;operada por n\u00edvel, v\u00e1lvula borboleta wafer de ferro d\u00factil, v\u00e1lvula borboleta revestida com Viton, v\u00e1lvula borboleta revestida com viton fabricada na China - fornecedor de v\u00e1lvulas de esfera de tit\u00e2nio na China, fabricantes de v\u00e1lvula globo criog\u00eanica na China, v\u00e1lvula borboleta C95800 na China, f\u00e1brica de v\u00e1lvula globo selada por fole, empresa de v\u00e1lvula globo inconel 625 | Fabricante profissional de v\u00e1lvulas<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/zecovalve.com\/pt\/zirconium-dual-plate-wafer-check-valve-astm-b752-gr-702c-dual-plate-wafer-check-valve-titanium-ball-valves-supplier-chinacryogenic-globe-valve-manufacturers-chinac95800-butterfly-valve-in-china.html\/\">V\u00e1lvula de reten\u00e7\u00e3o wafer de placa dupla de zirc\u00f4nio, ASTM B752 Gr. 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V\u00e1lvula de esfera F-2, V\u00e1lvula de esfera de tit\u00e2nio forjado, V\u00e1lvula de esfera de tit\u00e2nio NPT 3pc - Fornecedor de v\u00e1lvulas de esfera de tit\u00e2nio na China, Fabricantes de v\u00e1lvula globo criog\u00eanica na China, V\u00e1lvula borboleta C95800 na China, F\u00e1brica de v\u00e1lvula globo selada com fole, empresa de v\u00e1lvula globo inconel 625 | Fabricante profissional de v\u00e1lvulas<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>V\u00e1lvula de reten\u00e7\u00e3o: a v\u00e1lvula mais importante no sistema de processamento Principais fun\u00e7\u00f5es e fun\u00e7\u00f5es da v\u00e1lvula de reten\u00e7\u00e3o: Elas permitem apenas que o fluido \u2026 <a title=\"V\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o e v\u00e1lvula de reten\u00e7\u00e3o de pist\u00e3o\" class=\"read-more\" href=\"https:\/\/zecovalve.com\/pt\/a182-f304-lift-check-valve-high-quality-piston-check-valve-titanium-ball-valves-supplier-chinacryogenic-globe-valve-manufacturers-chinac95800-butterfly-valve-in-chinabellow-sealed-globe-valve-fa.html\" aria-label=\"Mais em V\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o e v\u00e1lvula de reten\u00e7\u00e3o de pist\u00e3o\">Ler mais<\/a><\/p>","protected":false},"author":2,"featured_media":16338,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","kt_blocks_editor_width":"","footnotes":""},"categories":[1],"tags":[2822,3330,1857],"class_list":["post-9189","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-lift-check-valve","tag-lift-check-valve-factory","tag-swing-check-valve","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"featured_image_src_large":["https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/flange-check-valve.jpg",800,600,false],"author_info":{"display_name":"Jerry","author_link":"https:\/\/zecovalve.com\/pt\/author\/jerry"},"comment_info":0,"category_info":[{"term_id":1,"name":"Uncategorized","slug":"uncategorized","term_group":0,"term_taxonomy_id":1,"taxonomy":"category","description":"","parent":0,"count":452,"filter":"raw","cat_ID":1,"category_count":452,"category_description":"","cat_name":"Uncategorized","category_nicename":"uncategorized","category_parent":0}],"tag_info":[{"term_id":2822,"name":"Lift Check Valve","slug":"lift-check-valve","term_group":0,"term_taxonomy_id":2822,"taxonomy":"post_tag","description":"","parent":0,"count":2,"filter":"raw"},{"term_id":3330,"name":"lift check valve factory","slug":"lift-check-valve-factory","term_group":0,"term_taxonomy_id":3330,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1857,"name":"swing check valve","slug":"swing-check-valve","term_group":0,"term_taxonomy_id":1857,"taxonomy":"post_tag","description":"","parent":0,"count":10,"filter":"raw"}],"taxonomy_info":{"category":[{"value":1,"label":"Uncategorized"}],"post_tag":[{"value":2822,"label":"Lift Check Valve"},{"value":3330,"label":"lift check valve factory"},{"value":1857,"label":"swing check valve"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Lift Check Valve &amp; Piston Check Valve | 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\/a182-f304-lift-check-valve-high-quality-piston-check-valve-titanium-ball-valves-supplier-chinacryogenic-globe-valve-manufacturers-chinac95800-butterfly-valve-in-chinabellow-sealed-globe-valve-fa.html\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lift Check Valve &amp; Piston Check Valve | ZECO Valve\" \/>\n<meta property=\"og:description\" content=\"Check valve: the most important valve in the processing system Main functions and functions of check valve: They only allow fluid to ... 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