{"id":19521,"date":"2022-07-11T07:47:18","date_gmt":"2022-07-11T07:47:18","guid":{"rendered":"https:\/\/zecovalve.com\/?p=19521"},"modified":"2023-07-05T13:24:27","modified_gmt":"2023-07-05T13:24:27","slug":"check-valve-types","status":"publish","type":"post","link":"https:\/\/zecovalve.com\/pt\/check-valve-types.html","title":{"rendered":"Tipos de v\u00e1lvulas de reten\u00e7\u00e3o - V\u00e1rios tipos de v\u00e1lvulas de reten\u00e7\u00e3o Fabricante"},"content":{"rendered":"<p>As v\u00e1lvulas de reten\u00e7\u00e3o s\u00e3o encontradas em quase todas as aplica\u00e7\u00f5es industriais, atuando como v\u00e1lvulas unidirecionais ou de reten\u00e7\u00e3o. As v\u00e1lvulas de reten\u00e7\u00e3o s\u00e3o dispositivos simples que desempenham uma fun\u00e7\u00e3o vital, evitando fluxos reversos, evitando danos e garantindo opera\u00e7\u00f5es eficientes. Diferentes tipos de v\u00e1lvulas de reten\u00e7\u00e3o s\u00e3o projetados para uma aplica\u00e7\u00e3o espec\u00edfica.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Princ\u00edpio de funcionamento das v\u00e1lvulas de reten\u00e7\u00e3o<\/h2>\n\n\n\n<p>Como j\u00e1 foi dito, uma v\u00e1lvula de reten\u00e7\u00e3o opera segundo o princ\u00edpio da press\u00e3o diferencial. Para que uma v\u00e1lvula de reten\u00e7\u00e3o abra, ela deve atingir uma press\u00e3o m\u00ednima a montante conhecida como press\u00e3o de abertura. Dependendo do projeto e tamanho da v\u00e1lvula de reten\u00e7\u00e3o, a press\u00e3o de abertura muda. Quando a press\u00e3o a montante atinge a press\u00e3o de abertura, a v\u00e1lvula abre, permitindo a entrada do fluido. A contrapress\u00e3o \u00e9 gerada quando a press\u00e3o a montante cai abaixo da press\u00e3o de craqueamento e o fluxo tenta se mover da sa\u00edda para a entrada. Neste ponto, a v\u00e1lvula de reten\u00e7\u00e3o fecha e o fluxo \u00e9 interrompido. O mecanismo de fechamento de uma v\u00e1lvula de reten\u00e7\u00e3o varia dependendo do projeto e do tipo da v\u00e1lvula. A press\u00e3o da mola ou da gravidade normalmente auxilia no processo de fechamento.<\/p>\n\n\n\n<p>Como a v\u00e1lvula de reten\u00e7\u00e3o funciona apenas em uma dire\u00e7\u00e3o, os fabricantes fornecem uma seta no corpo da v\u00e1lvula indicando a dire\u00e7\u00e3o do fluxo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-types-of-check-valves\">Tipos de v\u00e1lvulas de reten\u00e7\u00e3o<\/h2>\n\n\n\n<p>Os tipos de v\u00e1lvula de reten\u00e7\u00e3o ZECO podem ser divididos nos seguintes designs:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/zecovalve.com\/pt\/produto\/stainless-steel-swing-check-valve\/\"><strong><mark style=\"background-color:var(--base)\" class=\"has-inline-color has-contrast-2-color\">V\u00e1lvulas de reten\u00e7\u00e3o oscilantes<\/mark><\/strong><\/a><\/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. Muitos designs de discos e assentos est\u00e3o 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. Essas v\u00e1lvulas est\u00e3o totalmente fechadas quando o fluxo chega a zero para evitar refluxo. A turbul\u00eancia e a queda de press\u00e3o na v\u00e1lvula s\u00e3o muito baixas.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Swing-Check-Valve.jpg\" alt=\"\" class=\"wp-image-17941\" width=\"381\" height=\"358\" srcset=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Swing-Check-Valve.jpg 508w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Swing-Check-Valve-300x282.jpg 300w\" sizes=\"auto, (max-width: 381px) 100vw, 381px\" \/><\/figure>\n<\/div>\n\n\n<p>C\u00f3digos e padr\u00f5es da ind\u00fastria<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Projeto da v\u00e1lvula: BS 1868 \/ API 6D<\/li>\n\n\n\n<li>Teste de press\u00e3o: BS 6755-I<\/li>\n\n\n\n<li>Cara a cara: ANSI B 16.10<\/li>\n\n\n\n<li>Perfura\u00e7\u00e3o de flange: Tabela ANSI B 16.5 \/ BS 10 \/ DIN \/ IS \/ JIS Std.<\/li>\n\n\n\n<li>Extremidade de solda de topo: ANSI B 16.25<\/li>\n\n\n\n<li>Cara a cara: ANSI B 16.10<\/li>\n\n\n\n<li>Extremidade de solda de soquete: ANSI B 16.11<\/li>\n\n\n\n<li>Extremidade parafusada: ANSI B 1.20.1(BSP\/NPT)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/zecovalve.com\/pt\/produto\/wafer-dual-plate-check-valve\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong><mark style=\"background-color:var(--base)\" class=\"has-inline-color has-contrast-2-color\">V\u00e1lvulas de reten\u00e7\u00e3o wafer<\/mark><\/strong><\/a><\/h3>\n\n\n\n<p>A v\u00e1lvula de reten\u00e7\u00e3o tipo Wafer tem dimens\u00f5es face a face curtas e baixo peso, permitindo uma instala\u00e7\u00e3o simples com economia de espa\u00e7o entre os flanges acompanhantes.<\/p>\n\n\n\n<p>As v\u00e1lvulas s\u00e3o adequadas para montagem entre pesco\u00e7os soldados ou flanges complementares do tipo slip-on de diferentes padr\u00f5es.<\/p>\n\n\n\n<p>Eles s\u00e3o especialmente desenvolvidos para aplica\u00e7\u00f5es onde uma baixa perda de press\u00e3o \u00e9 essencial. A abertura e o fechamento da v\u00e1lvula ocorrer\u00e3o com uma diferen\u00e7a de press\u00e3o extremamente baixa sobre o disco da v\u00e1lvula.<\/p>\n\n\n\n<p>A combina\u00e7\u00e3o do eixo do disco exc\u00eantrico com a sede do disco garante um fechamento positivo do meio de retorno. As v\u00e1lvulas de reten\u00e7\u00e3o Wafer est\u00e3o se tornando o tipo preferido de v\u00e1lvula de reten\u00e7\u00e3o para a maioria das aplica\u00e7\u00f5es devido ao seu design compacto e custo relativamente baixo.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/wafer-dual-plate-check-valve.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o de placa dupla de wafer\" class=\"wp-image-16568\" width=\"400\" height=\"300\" srcset=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/wafer-dual-plate-check-valve.jpg 800w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/wafer-dual-plate-check-valve-300x225.jpg 300w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/wafer-dual-plate-check-valve-768x576.jpg 768w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/wafer-dual-plate-check-valve-600x450.jpg 600w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><figcaption class=\"wp-element-caption\">V\u00e1lvula de reten\u00e7\u00e3o de placa dupla de wafer<\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">V\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o\/v\u00e1lvula de reten\u00e7\u00e3o de pist\u00e3o<\/h3>\n\n\n\n<p>O design da sede de uma v\u00e1lvula lift-check \u00e9 semelhante ao de uma v\u00e1lvula globo. O disco geralmente tem a forma de um pist\u00e3o ou de uma esfera.<\/p>\n\n\n\n<p>As v\u00e1lvulas de reten\u00e7\u00e3o de eleva\u00e7\u00e3o s\u00e3o particularmente adequadas para servi\u00e7os de alta press\u00e3o com alta velocidade de fluxo. Nas v\u00e1lvulas de reten\u00e7\u00e3o de eleva\u00e7\u00e3o, o disco \u00e9 guiado com precis\u00e3o e se encaixa perfeitamente no amortecedor. As v\u00e1lvulas de reten\u00e7\u00e3o de eleva\u00e7\u00e3o s\u00e3o adequadas para instala\u00e7\u00e3o em tubula\u00e7\u00f5es horizontais ou verticais com fluxo ascendente.<\/p>\n\n\n\n<p>Fluxo para eleva\u00e7\u00e3o As v\u00e1lvulas de reten\u00e7\u00e3o devem sempre entrar abaixo da sede. \u00c0 medida que o fluxo entra, o pist\u00e3o ou esfera \u00e9 elevado dentro das guias a partir da sede pela press\u00e3o do fluxo ascendente. Quando o fluxo para ou inverte, o pist\u00e3o ou esfera \u00e9 for\u00e7ado na sede da v\u00e1lvula pelo refluxo e pela gravidade.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Piston-Check-Valve-798x1024.jpg\" alt=\"\" class=\"wp-image-17942\" width=\"399\" height=\"512\" srcset=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Piston-Check-Valve-798x1024.jpg 798w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Piston-Check-Valve-234x300.jpg 234w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Piston-Check-Valve-768x986.jpg 768w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Piston-Check-Valve-600x770.jpg 600w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Piston-Check-Valve.jpg 835w\" sizes=\"auto, (max-width: 399px) 100vw, 399px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">V\u00e1lvulas de reten\u00e7\u00e3o de esfera<\/h3>\n\n\n\n<p>As v\u00e1lvulas de reten\u00e7\u00e3o de esfera s\u00e3o simples e comumente usadas em bombas pequenas e sistemas de baixa altura manom\u00e9trica. As v\u00e1lvulas de reten\u00e7\u00e3o de esfera envolvem um tamp\u00e3o esf\u00e9rico com mola ou flutuante para fechar em press\u00f5es abaixo da press\u00e3o de abertura. A sede de veda\u00e7\u00e3o \u00e9 c\u00f4nica para guiar a esfera para dentro da sede e criar uma veda\u00e7\u00e3o positiva. No entanto, estas v\u00e1lvulas podem desgastar-se facilmente devido ao uso prolongado e requerem manuten\u00e7\u00e3o frequente.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Ball-Check-Valves.webp\" alt=\"\" class=\"wp-image-19441\" width=\"477\" height=\"456\"\/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">V\u00e1lvulas de reten\u00e7\u00e3o de disco inclin\u00e1vel<\/h3>\n\n\n\n<p>A v\u00e1lvula de reten\u00e7\u00e3o de disco inclin\u00e1vel tem apar\u00eancia semelhante a uma v\u00e1lvula borboleta exc\u00eantrica. O corpo da v\u00e1lvula tem flange duplo e comprimento curto. O disco \u00e9 colocado atrav\u00e9s de um eixo posicionado excentricamente a partir da linha central do corpo nos eixos horizontal e vertical.<\/p>\n\n\n\n<p>A dupla excentricidade do eixo faz com que a se\u00e7\u00e3o inferior do disco ocupe uma \u00e1rea maior no trajeto do fluxo. Consequentemente, o disco come\u00e7a a abrir a taxas de fluxo muito baixas. Portanto, a v\u00e1lvula de reten\u00e7\u00e3o de disco inclin\u00e1vel \u00e9 comumente usada em sistemas de bombeamento com baixas vaz\u00f5es e para fluxos pulsantes.<\/p>\n\n\n\n<p>Durante a revers\u00e3o do fluxo, o disco fecha devido \u00e0 gravidade. A parte superior do disco acima da linha central do eixo empurra contra o fluxo, agindo assim como um freio hidr\u00e1ulico que amortece o disco quando ele retorna \u00e0 posi\u00e7\u00e3o fechada. As v\u00e1lvulas de disco inclin\u00e1vel podem ser fornecidas com alavancas e pesos opcionais para ajustar as caracter\u00edsticas de fechamento da v\u00e1lvula. Como tal, as v\u00e1lvulas de reten\u00e7\u00e3o de disco inclin\u00e1vel s\u00e3o adequadas para reduzir o risco de golpes de ar\u00edete.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Tilted-Disc-check-valves.jpg\" alt=\"\" class=\"wp-image-17943\" width=\"377\" height=\"358\" srcset=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Tilted-Disc-check-valves.jpg 502w, https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/07\/Tilted-Disc-check-valves-300x285.jpg 300w\" sizes=\"auto, (max-width: 377px) 100vw, 377px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"h-butterfly-check-valve\">V\u00e1lvula de reten\u00e7\u00e3o borboleta<\/h3>\n\n\n\n<p>Uma v\u00e1lvula de reten\u00e7\u00e3o borboleta \u00e9 uma v\u00e1lvula de reten\u00e7\u00e3o de placa dupla, v\u00e1lvula de reten\u00e7\u00e3o de disco dobr\u00e1vel, v\u00e1lvula de reten\u00e7\u00e3o de disco duplo ou v\u00e1lvula de reten\u00e7\u00e3o de disco dividido. Como o nome sugere, duas metades do disco se movem em dire\u00e7\u00e3o \u00e0 linha central com o fluxo direto e, com o fluxo reverso, as duas metades se abrem e repousam na sede para fechar o fluxo.<\/p>\n\n\n\n<p>Esses tipos de v\u00e1lvulas de reten\u00e7\u00e3o s\u00e3o bons para sistemas de l\u00edquidos de baixa press\u00e3o, bem como para sistemas de tubula\u00e7\u00e3o de g\u00e1s. A sua constru\u00e7\u00e3o leve e compacta torna-o uma escolha prefer\u00edvel quando o espa\u00e7o e a conveni\u00eancia s\u00e3o importantes. Al\u00e9m disso, \u00e9 80 a 90% mais leve que a v\u00e1lvula de reten\u00e7\u00e3o convencional de corpo inteiro e o custo de instala\u00e7\u00e3o e manuten\u00e7\u00e3o \u00e9 menor que outros tipos.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00e1lvula de reten\u00e7\u00e3o de diafragma<\/h3>\n\n\n\n<p>As v\u00e1lvulas de reten\u00e7\u00e3o de diafragma consistem em diafragmas flex\u00edveis de borracha ou discos autocentrantes para evitar refluxo. Quando a press\u00e3o de entrada aumenta, o diafragma se abre e o fluxo come\u00e7a. Existem dois tipos de v\u00e1lvulas de reten\u00e7\u00e3o de diafragma;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>V\u00e1lvula normalmente aberta flutuante<\/li>\n\n\n\n<li>V\u00e1lvula Flex\u00edvel Normalmente Fechada Fixa<\/li>\n<\/ul>\n\n\n\n<p>No caso de v\u00e1lvulas de diafragma normalmente abertas, nenhuma press\u00e3o de abertura \u00e9 necess\u00e1ria, pois o diafragma elastom\u00e9rico autocentrado \u00e9 flutuante. No entanto, eles precisam de contrapress\u00e3o para fechar a v\u00e1lvula. Por outro lado, as v\u00e1lvulas normalmente fechadas necessitam de uma certa press\u00e3o de entrada para superar a elasticidade do diafragma fixo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00e1lvula de reten\u00e7\u00e3o de parada<\/h3>\n\n\n\n<p>Uma v\u00e1lvula de reten\u00e7\u00e3o de parada consiste em duas v\u00e1lvulas embutidas em um corpo. Pode atuar como uma v\u00e1lvula globo para fins de isolamento ou regula\u00e7\u00e3o. Novamente, pode atuar como uma v\u00e1lvula de reten\u00e7\u00e3o para evitar refluxo. Ao contr\u00e1rio de outras v\u00e1lvulas de reten\u00e7\u00e3o, a v\u00e1lvula de reten\u00e7\u00e3o Stop possui um mecanismo de controle externo adicional na dire\u00e7\u00e3o perpendicular ou angular. As v\u00e1lvulas Stop Check s\u00e3o populares em servi\u00e7os de vapor, como usinas de energia, circula\u00e7\u00e3o de caldeiras, geradores de vapor, resfriamento de turbinas e sistemas de seguran\u00e7a.<\/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\/introduction-of-epdm-nbr-butterfly-valve-seat-industrial-valve-information-news-zeco-valve.html\/\">V\u00e1lvula borboleta NBR<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/advantages-and-disadvantages-of-globe-valves.html\/\">O que \u00e9 uma v\u00e1lvula de globo?<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/difference-between-gate-valves-and-ball-valves.html\/\">V\u00e1lvula de gaveta vs V\u00e1lvula de esfera<\/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\/difference-between-gate-valve-and-butterfly-valve.html\/\">Diferen\u00e7a entre a v\u00e1lvula de gaveta e a v\u00e1lvula de borboleta<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/the-difference-between-globe-valve-and-ball-valve.html\/\">V\u00e1lvula de Globo vs V\u00e1lvula de Esfera<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/pt\/history-of-automatic-control-valve-zeco-valve-industrial-valve-manufacturer.html\/\">O que s\u00e3o v\u00e1lvulas de controlo autom\u00e1ticas?<\/a>\n\n<\/div>","protected":false},"excerpt":{"rendered":"<p>As v\u00e1lvulas de reten\u00e7\u00e3o s\u00e3o encontradas em quase todas as aplica\u00e7\u00f5es industriais, atuando como v\u00e1lvulas unidirecionais ou de reten\u00e7\u00e3o. V\u00e1lvulas de reten\u00e7\u00e3o s\u00e3o dispositivos simples que executam\u2026 <a title=\"Tipos de v\u00e1lvulas de reten\u00e7\u00e3o \u2013 Fabricante de v\u00e1rios tipos de v\u00e1lvulas de reten\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/zecovalve.com\/pt\/check-valve-types.html\" aria-label=\"Mais em Tipos de v\u00e1lvulas de reten\u00e7\u00e3o \u2013 Fabricante de v\u00e1rios tipos de v\u00e1lvulas de reten\u00e7\u00e3o\">Ler mais<\/a><\/p>","protected":false},"author":2,"featured_media":18005,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","kt_blocks_editor_width":"","footnotes":""},"categories":[1],"tags":[2823,2824,2819,1882,2825,2822,2826,1857,2820,2821,1883,2546],"class_list":["post-19521","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-ball-check-valve","tag-butterfly-check-valve","tag-check-valve-types","tag-check-valve-wiki","tag-diaphragm-check-valve","tag-lift-check-valve","tag-stop-check-valve","tag-swing-check-valve","tag-types-of-check-valve","tag-types-of-check-valves","tag-valve-wikipedia","tag-wafer-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\/07\/Wafer-Type-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":2823,"name":"Ball Check Valve","slug":"ball-check-valve","term_group":0,"term_taxonomy_id":2823,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":2824,"name":"Butterfly Check Valve","slug":"butterfly-check-valve","term_group":0,"term_taxonomy_id":2824,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":2819,"name":"Check Valve Types","slug":"check-valve-types","term_group":0,"term_taxonomy_id":2819,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":1882,"name":"Check Valve Wiki","slug":"check-valve-wiki","term_group":0,"term_taxonomy_id":1882,"taxonomy":"post_tag","description":"<!-- wp:generateblocks\/button-container {\"uniqueId\":\"f8260ba6\",\"isDynamic\":true,\"blockVersion\":2} -->\r\n<!-- wp:generateblocks\/button {\"uniqueId\":\"e4f70767\",\"hasUrl\":true,\"target\":true,\"backgroundColor\":\"#0366d6\",\"textColor\":\"#ffffff\",\"backgroundColorHover\":\"#222222\",\"textColorHover\":\"#ffffff\",\"paddingTop\":\"15\",\"paddingRight\":\"20\",\"paddingBottom\":\"15\",\"paddingLeft\":\"20\"} -->\r\n<a class=\"gb-button gb-button-e4f70767 gb-button-text\" href=\"mailto:commercial@zecovalve.com\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>GET CHECK VALVE WIKI<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_0ef6a7-5d\"} \/-->\r\n\r\n<!-- wp:heading -->\r\n<h2>Valve Wiki<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA valve is a device or natural object that regulates, directs, or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe simplest, and very ancient, valve is simply a freely hinged flap that swings down to obstruct fluid (gas or liquid) flow in one direction but is pushed up by the flow itself when the flow is moving in the opposite direction. This is called a check valve, as it prevents or \"checks\" the flow in one direction. Modern control valves may regulate pressure or flow downstream and operate on sophisticated automation systems. (sources from Wikipedia)\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-check-valve-wiki\"><strong>Check Valve Wiki<\/strong><\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA check valve is a type of valve that normally allows fluid (liquid or gas) to flow through it in one direction, but not the opposite direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items. Although they are available in a wide range of sizes and costs, many check valves are very small, simple, and\/or cheap. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of plastic or metal, and some alloy check valves are made of exotic materials, such as nickel-copper alloys or titanium.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Type of <a href=\"https:\/\/zecovalve.com\/product-category\/check-valve\">Check Valves<\/a><\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Ball Check Valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA ball check valve is a check valve in which the closing member, the movable part to block the flow, is a spherical ball. In some ball check valves, the ball is spring-loaded to help keep it shut. For those designs without a spring, reverse flow is required to move the ball toward the seat and create a seal. The interior surface of the main seats of ball check valves is more or less conically-tapered to guide the ball into the seat and form a positive seal when stopping reverse flow.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA ball check valve uses a free-floating or spring-loaded ball that rests on the sealing seat to close the orifice. The sealing seat is normally conically tapered to guide the ball into the seat and create a positive seal, thereby stopping reverse flow. When the pressure of the fluid in the inlet side exceeds the cracking pressure, the ball is dislodged from its seat, which permits flow. When the inlet pressure doesn\u2019t exceed the cracking pressure, or there is back pressure, the ball will close with the back pressure or via the spring, effectively closing the orifice. True union ball check valves allow for easy removal and replacement of balls, eliminating the need to buy a new valve.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Diaphragm Check Valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA diaphragm check valve uses a flexing rubber diaphragm positioned to create a normally-closed valve. Pressure on the upstream side must be greater than the pressure on the downstream side by a certain amount, known as the pressure differential, for the check valve to open allowing flow. Once positive pressure stops, the diaphragm automatically flexes back to its original closed position.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Swing Check Valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nSwing check valves are called \u2018tilting-disc\u2019 or \u2018flapper\u2019 check valves. They have a disc on a hinge (or trunnion) that swings open with an inlet pressure. The disc swings shut as the inlet pressure decreases or if there is backflow. If there is no spring to assist in closing, mounting orientation is important to consider to ensure that the disc swings shut with gravity. A dual disk or double door check valve has a central disk that is split into two semicircular doors that function independently hinged on a central pivot point. Figure 7 shows an example of a swing check valve. Read our article on swing check valves for more information.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Stop Check Valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA stop-check valve is a check valve with override control to stop flow regardless of flow direction or pressure. In addition to closing in response to backflow or insufficient forward pressure, it can also be deliberately shut by an external mechanism, thereby preventing any flow regardless of forward pressure.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Lift Check Valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA lift-check valve is a check valve in which the disc, sometimes called a lift, can be lifted up off its seat by higher pressure of inlet or upstream fluid to allow flow to the outlet or downstream side. A guide keeps the motion of the disc on a vertical line, so the valve can later reseat properly. When the pressure is no longer higher, gravity or higher downstream pressure will cause the disc to lower onto its seat, shutting the valve to stop reverse flow.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Spring-loaded in-line Check Valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nIn-line spring-loaded check valves are common, easy to understand, and have a simple design. Figure 2 shows a spring-loaded in-line check valve in the open and closed positions. The arrows indicate flow direction. When flow enters the input port of the valve, it should have enough pressure (force) to overcome the cracking pressure and the spring force. The pressure pushes the disc, opening the orifice and allowing flow to move through the valve. When the input pressure is no longer high enough or there is enough back pressure, the back pressure and spring push the disc against the orifice and seal the valve shut. The spring, along with the short travel distance for the disc, allows for a quick reaction time for closing. This valve design also prevents pressure surges in the line, preventing water hammering.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Duckbill Valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA duckbill valve is a check valve in which flow proceeds through a soft tube that protrudes into the downstream side. Back pressure collapses this tube, cutting off flow.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Multiple Check Valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nMultiple check valves can be connected in series. For example, a double-check valve is often used as a backflow prevention device to keep potentially contaminated water from siphoning back into municipal water supply lines. There are also double ball check valves in which there are two ball or seat combinations sequentially in the same body to ensure positive leak-tight shutoff when blocking reverse flow; and piston check valves, wafer check valves, and ball-and-cone check valves.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Flap Valve Wiki<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA flap valve is a type of non-return device for water or sewerage. The purpose of a flap valve is to ensure water can pass through the valve in one direction only. Flap valves operate by water flowing through a pipe or culvert and pushing the swinging door open. When the water level on the downstream side of the flap valve is higher than in the pipe or culvert it presses the swinging, door shut and prevents the water from traveling back through the system.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA Flap Valve, in simple words, permits gas or fluid to flow in one direction while preventing backflow. A spring-loaded or weighted flap affixed to the opening of a pipe, tube, or duct accomplishes this function. Flap valves are commonly used as industrial equipment to direct flow in the desired direction. They can be opened manually or remotely, and they can be opened by the force of the flow. The purpose of a flap valve is to send water out of a flanged pipe while preventing debris such as sticks and leaves from flowing back in. The valve will open when direct pressure is applied to it, and it will close when that pressure is alleviated.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":9,"filter":"raw"},{"term_id":2825,"name":"Diaphragm Check Valve","slug":"diaphragm-check-valve","term_group":0,"term_taxonomy_id":2825,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"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":2826,"name":"Stop Check Valve","slug":"stop-check-valve","term_group":0,"term_taxonomy_id":2826,"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"},{"term_id":2820,"name":"Types of Check Valve","slug":"types-of-check-valve","term_group":0,"term_taxonomy_id":2820,"taxonomy":"post_tag","description":"<!-- wp:paragraph -->\r\n\r\nCheck valves are found in almost every industrial application acting as one-way or non-return valves. Check valves are simple devices that perform a vital function by preventing reverse flows, therefore preventing damage and ensuring efficient operations. Different types of check valves are designed for a specific application. To help you choose the right check valve for your needs, here are a few of the most common types of check valves and their recommended applications. Follow this new blog in Linquip to find out more.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_40f5bf-86\"} \/-->\r\n\r\n<!-- wp:generateblocks\/button-container {\"uniqueId\":\"6d8495a3\",\"isDynamic\":true,\"blockVersion\":2} -->\r\n<!-- wp:generateblocks\/button {\"uniqueId\":\"3d442e11\",\"hasUrl\":true,\"target\":true,\"backgroundColor\":\"#0366d6\",\"textColor\":\"#ffffff\",\"backgroundColorHover\":\"#222222\",\"textColorHover\":\"#ffffff\",\"paddingTop\":\"15\",\"paddingRight\":\"20\",\"paddingBottom\":\"15\",\"paddingLeft\":\"20\"} -->\r\n<a class=\"gb-button gb-button-3d442e11 gb-button-text\" href=\"mailto:commercial@zecovalve.com\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>GET TYPES OF CHECK VALVE INFORMATION<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Working of Types of Check Valves<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nAs already stated that a check valve operates on the principle of differential pressure. For a check valve to open, it must attain a minimum upstream pressure known as cracking pressure. Depending on the check valve design and size, the cracking pressure changes. When the upstream pressure reaches the cracking pressure, the valve opens allowing the fluid to enter. When the upstream pressure falls below the cracking pressure, back pressure is generated and the flow attempt to move from outlet to inlet. At this point, the check valve closes, and the flow halts. The closing mechanism of a check valve varies depending on the design and type of the valve. Spring or Gravity pressure normally assist the closing process.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Check Valve Types<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Lift Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nLift-check valves feature a guided disc and a similar seating arrangement as globe valves. The disc is usually in the form of a piston or a ball. There are three body patterns (horizontal, angle, and vertical) that can be installed in horizontal or vertical lines with upward flow.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nWhen the flow enters below the seat, a disk is raised from the seat by the pressure of the upward flow. When the flow stops or reverses, the backflow and gravity force the disk downward to set on the seat.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nLift check valves are particularly suitable for high-pressure service where the velocity of flow is high. They are commonly used in high-rise buildings, industrial and power plant applications, and water and wastewater applications. They have no external moving parts and are known to be economical and reliable. Over time, these types of check valves can have high energy costs because the disc remains in the flow stream during operation.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThere are two types of lift check valves:\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Piston Check Valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThis type of check valve is also known as a plug check valve. It operates by controlling the flow of fluid in a piping system utilizing the linear motion of a piston within the valve chamber. Sometimes the piston has a spring attached, which helps it stay in the closed position when not in use.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Ball Check Valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe ball check valve operates simply using gravity. When there is enough pressure in the flow, the ball is lifted upward, and when the pressure is decreased, the ball rolls down and closes the opening. Ball Check Valves come in a wide range of material types and style types.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Swing Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nSwing Check Valves are available in straight body design and y-pattern design. The disk is suspended from the body by means of a hinge pin and seals against the seat which is integral to the body.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThese valves are typically used in sizes 2 inches and over. Swing check valves can be installed in both horizontal and vertical positions. They are not suitable for pulsating flow.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe closure response of the swing check valve is slower compared to the lift check valve due to longer disc travel and inertia of the disk.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Specifications of Swing Check Valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>Valve Design: BS 1868 \/ API 6D<\/li>\r\n \t<li>Pressure Testing: BS 6755-I<\/li>\r\n \t<li>Face To Face: ANSI B 16.10<\/li>\r\n \t<li>Flange Drilling : ANSI B 16.5 \/ BS 10 Table \/ DIN \/ IS \/ JIS Std.<\/li>\r\n \t<li>Butt Weld End: ANSI B 16.25<\/li>\r\n \t<li>Face to Face: ANSI B 16.10<\/li>\r\n \t<li>Socket Weld End: ANSI B 16.11<\/li>\r\n \t<li>Screwed End: ANSI B 1.20.1(BSP\/NPT)<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Tilting Disc Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe tilting disc check valve is similar in appearance to an eccentric butterfly valve. The valve body is double\u2010flanged and of a short length. The disc is held in place via a shaft which is positioned eccentrically from the body centreline in both the horizontal and vertical axes.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe double eccentricity of the shaft results in the lower section of the disc occupying a greater area in the flow path. Consequently, the disc begins to open at very low flow rates. The tilting disc check valve is therefore commonly used in pumping systems with low flow rates and also for pulsating flows.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nDuring flow reversal, the disc closes due to gravity and the upper part of the disc above the shaft centreline pushes against the flow thus acting as a hydraulic brake that cushions the disc as it returns to the closed position. Tilting disc valves can be supplied with optional levers and weights to adjust the closing characteristics of the valve. As such, the tilting disc check valves are well suited to reduce the risk of water hammers.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Butterfly Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA butterfly check valve is known as a dual plate check valve, folding disc check valve, double-disc, or split disc check valve. As the name suggests, two halves of the disk move towards the centerline with the forward flow, and with reverse flow two halves open and rest on the seat to close the flow.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThese types of check valves are good for low-pressure liquid systems as well as gas piping systems. Its lightweight and compact construction make it a preferable choice when space and convenience are important. Besides, it is 80 to 90% lighter than the conventional full-body check valve and the cost of installation and maintenance is lower compared to other types.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Stop Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nStop-check valves can be used for many applications. They\u2019re designed to start, stop, and regulate the flow of materials, and they help to prevent backflow.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nIf the pressure in the system is too low, these valves will automatically close to prevent reverse flow. As a result, damage usually caused by backflow is prevented.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nstop-check-valveThese types of check valves also work with an external mechanism or an override control. With these, you can set the valve to close regardless of flow direction or pressure to ensure safe and efficient operations.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nGenerally, stop-check valves are used in power plants and boiler systems. They\u2019re also beneficial for petroleum production and refining, hydrocarbon processing, and high-pressure safety services.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Diaphragm Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nDiaphragm check valves consist of rubber flexing diaphragms or self-centering discs for preventing backflow. When the inlet pressure is increased, the diaphragm flexes open, and flow starts. There are two types of diaphragm check valves;\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li>Free-floating Normally Open Valve<\/li>\r\n \t<li>Fixed Flexing Normally closed Valve<\/li>\r\n<\/ul>\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nIn the case of normally open diaphragm valves, no cracking pressure is required as the self-centering elastomeric diaphragm is free-floating. However, they need back pressure to close the valve. On the other hand, normally closed valves need a certain inlet pressure to overcome the elasticity of the fixed diaphragm.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nDue to very low cracking pressure, Diaphragm check valves find their use in low pressure and vacuum applications.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Spring Loaded Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThere are two types of Spring Loaded Check Valves; Spring Loaded in-line valves and Spring loaded Y-valves.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Spring Loaded in-line valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nIn-line valves are also known as Nozzle Check Valves or Silent Check Valves. These valves employ a centrally guided stem-disc assembly along with a compression spring. To open the valve, the flow pressure must be more than the spring force and cracking pressure. In that case, the flow pushes the disc allowing the flow. When the inlet pressure reduces, the spring pushes the disc against the orifice and shut the valve.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4>Spring Loaded Y-valve<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe operating principle of Spring-loaded y-check valves is similar to in-line check valves. The only difference is that the spring and movable disc are located at an angle to form a \u2018y\u2019 shape. The main advantage of Y-type check valves is that they can be inspected and serviced while the valve is still connected to the system.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Foot Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA foot valve is a check valve that has a strainer installed on the inlet side to prevent debris from entering the valve.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Duckbill Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nDuckbill Check Valves are unique, one-piece, elastomeric components that enable flow to proceed through a soft tube that feeds into the downstream side of the valve wherein back pressure collapses the tube and cuts off the flow.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Wafer Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nWafer check valves are very slim and compact in design and use a swinging disc to allow or block flow. They are lightweight and suitable for various applications. They are economical and are available in various sizes. The following figure shows the typical working of a Wafer Check Valve.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nWafer check valves are ideal for services requiring low-pressure loss as the valve operation takes place at a very low-pressure difference.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Silent Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nSilent check valves are incredibly useful for water pipelines and systems. These valves are engineered to control and protect against pressure surges that can occur in water lines. They also work to prevent water hammer and reverse flow.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nSilent check valves are constructed with a spring-assisted disc. When the fluid pressure in the valve is higher than the cracking pressure, or the pressure needed open or close the valve, the spring lowers the disc to prevent reverse flow.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe valve is also manufactured to include a guide to keep the disc moving in vertically. This allows it to reseat properly.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Non-slam Check Valve<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThe swing check valve closes abruptly because of gravity and causes a pressure surge resulting in shock waves.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThese high-pressure waves cause severe stress on the piping system.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nThis problem can be minimized by installing a Non-Slam type check valve. Non-Slam check valves do not rely on gravity. As the upstream velocity of the fluid slows the spring assist on the valve start to close the disc.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nBy the time the upstream velocity comes to 0, the disc is completely closed. With the reverse flow eliminated, the force necessary to produce a water hammer on either side of the valve is substantially reduced.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":13,"filter":"raw"},{"term_id":2821,"name":"Types of Check Valves","slug":"types-of-check-valves","term_group":0,"term_taxonomy_id":2821,"taxonomy":"post_tag","description":"","parent":0,"count":3,"filter":"raw"},{"term_id":1883,"name":"Valve Wikipedia","slug":"valve-wikipedia","term_group":0,"term_taxonomy_id":1883,"taxonomy":"post_tag","description":"<!-- wp:generateblocks\/button-container {\"uniqueId\":\"f8260ba6\",\"isDynamic\":true,\"blockVersion\":2} -->\r\n<!-- wp:generateblocks\/button {\"uniqueId\":\"e4f70767\",\"hasUrl\":true,\"target\":true,\"backgroundColor\":\"#0366d6\",\"textColor\":\"#ffffff\",\"backgroundColorHover\":\"#222222\",\"textColorHover\":\"#ffffff\",\"paddingTop\":\"15\",\"paddingRight\":\"20\",\"paddingBottom\":\"15\",\"paddingLeft\":\"20\"} -->\r\n<a class=\"gb-button gb-button-e4f70767 gb-button-text\" href=\"mailto:commercial@zecovalve.com\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>GET VALVE WIKIPEDIA<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_d5c49d-10\"} \/-->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-valve-wikipedia\"><a href=\"https:\/\/zecovalve.com\"><strong>Valve Wikipedia<\/strong><\/a><\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nA valve is a device or natural object that regulates, directs, or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways.\r\n\r\n<!-- \/wp:paragraph -->\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 {\"id\":16646,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\r\n<figure class=\"wp-block-image size-full\"><img class=\"wp-image-16646\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/carbon-steel-ball-valve-3.jpg\" alt=\"\" \/><\/figure>\r\n<!-- \/wp:image -->\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 {\"id\":16050,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\r\n<figure class=\"wp-block-image size-full\"><img class=\"wp-image-16050\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/gear-operated-gate-valve-2.jpg\" alt=\"\" \/><\/figure>\r\n<!-- \/wp:image -->\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 {\"id\":27344,\"sizeSlug\":\"full\",\"linkDestination\":\"none\"} -->\r\n<figure class=\"wp-block-image size-full\"><img class=\"wp-image-27344\" src=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/12\/Butterfly-Valve-12in-150LB-C95800.jpg\" alt=\"\" \/><\/figure>\r\n<!-- \/wp:image -->\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>What is the Function of Valve?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul><!-- wp:list-item -->\r\n \t<li>Ball valve:<!-- wp:list -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul><!-- wp:list-item -->\r\n \t<li>The ball valve is a common valve type, which is improved from the plug valve and replaces the plunger with a ball. The ball is provided with a through-the-hole, and the rotation of the ball can control the cooperation between the through-the-hole and the flow channel to adjust the opening and closing of the valve. The ball valve is used to cut off, distribute and change the flow direction of the medium in the pipeline. It only needs to be rotated 90 degrees and a small torque can be closed tightly. The valve seat can be made of suitable material according to the working conditions. It is widely used because of its good sealing performance, simple structure, and easy operation and maintenance.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list --><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul>\r\n \t<li>Globe valve:<!-- wp:list -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul><!-- wp:list-item -->\r\n \t<li>It is called because its shape resembles a ball. It opens or closes the flow channel with the cooperation of the valve plate and the valve seat. It is often used for cutting off and throttling. The flow channel in the valve body is S-shaped, when the fluid passes through, the flow direction will be changed, which will increase the resistance and reduce the fluid pressure.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list --><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul>\r\n \t<li>Gate valve:<!-- wp:list -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul><!-- wp:list-item -->\r\n \t<li>The valve stem is used to drive the gate to move in a straight line, and the gate is lifted to open or close the flow channel. When the gate is half-opened, the fluid impacting the gate will easily cause the valve seat to vibrate and be damaged, so it is not suitable for throttling use. It is only suitable for fully open or fully closed occasions.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list --><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul>\r\n \t<li>Check valve:<!-- wp:list -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul><!-- wp:list-item -->\r\n \t<li>A check valve is also called a one-way valve. It is a valve that automatically opens and closes according to the pressure difference between the front and rear of the valve disc, allowing only a one-way flow of fluid. Under the action of fluid pressure in one direction, the valve flap opens to make the flow channel unblocked. Conversely, when the fluid pressure in the other direction acts, the valve flap is closed to prevent backflow.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list --><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul>\r\n \t<li>Butterfly valve:<!-- wp:list -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul><!-- wp:list-item -->\r\n \t<li>The butterfly valve can adjust the opening and closing and flow rate by controlling the rotation angle of the valve plate. Butterfly valves can be divided into elastic seals and metal direct seals. The elastic seals use rubber rings to prevent leakage and have good low-pressure sealing, but the rubber rings have temperature and pressure limitations. Metal direct sealing is direct contact between metal surfaces and has a wide operating temperature range. Butterfly valves are suitable for installation on large-diameter pipes.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list --><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul>\r\n \t<li>Plug valve:<!-- wp:list -->\r\n<ul>\r\n \t<li style=\"list-style-type: none\">\r\n<ul><!-- wp:list-item -->\r\n \t<li>The plug valve is mainly composed of a valve body and a plug, and the faucet is a kind of plug valve.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list --><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading -->\r\n<h2>How is the Valve Produced?<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nValves can be produced in any desired diameter and from various materials. Valves can control all fluids, from gases to high-impact chemicals, steam, toxic gases, and radioactive materials. They can operate from very low temperatures to the highest temperatures, from vacuum pressures to hundreds of bar high-pressure conditions. The valve varies according to pipe diameters, system structure, and system pressure.\r\n\r\n<!-- \/wp:paragraph -->","parent":0,"count":7,"filter":"raw"},{"term_id":2546,"name":"Wafer Check Valve","slug":"wafer-check-valve","term_group":0,"term_taxonomy_id":2546,"taxonomy":"post_tag","description":"","parent":0,"count":4,"filter":"raw"}],"taxonomy_info":{"category":[{"value":1,"label":"Uncategorized"}],"post_tag":[{"value":2823,"label":"Ball Check Valve"},{"value":2824,"label":"Butterfly Check Valve"},{"value":2819,"label":"Check Valve Types"},{"value":1882,"label":"Check Valve Wiki"},{"value":2825,"label":"Diaphragm Check Valve"},{"value":2822,"label":"Lift Check Valve"},{"value":2826,"label":"Stop Check Valve"},{"value":1857,"label":"swing check valve"},{"value":2820,"label":"Types of Check Valve"},{"value":2821,"label":"Types of Check Valves"},{"value":1883,"label":"Valve Wikipedia"},{"value":2546,"label":"Wafer Check Valve"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Check Valve Types - Various Types of Check Valves Manufacturer | ZECO<\/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\/check-valve-types.html\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Check Valve Types - Various Types of Check Valves Manufacturer | ZECO\" \/>\n<meta property=\"og:description\" content=\"Check valves are found in almost every industrial application acting as one-way or non-return valves. 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