{"id":5592,"date":"2020-04-25T03:44:26","date_gmt":"2020-04-25T03:44:26","guid":{"rendered":"https:\/\/www.stvvalves.com\/?p=5592"},"modified":"2020-05-04T04:51:05","modified_gmt":"2020-05-04T04:51:05","slug":"introduction-of-the-function-of-check-valve-and-the-analysis-of-the-reason-why-check-valve-doesnt-work","status":"publish","type":"post","link":"https:\/\/www.stvvalves.com\/pt\/introduction-of-the-function-of-check-valve-and-the-analysis-of-the-reason-why-check-valve-doesnt-work\/","title":{"rendered":"Introdu\u00e7\u00e3o da fun\u00e7\u00e3o da v\u00e1lvula de reten\u00e7\u00e3o e an\u00e1lise do motivo pelo qual a v\u00e1lvula de reten\u00e7\u00e3o n\u00e3o funciona"},"content":{"rendered":"<p>Fun\u00e7\u00e3o da v\u00e1lvula de reten\u00e7\u00e3o<br>A resist\u00eancia ao fluido da v\u00e1lvula de reten\u00e7\u00e3o oscilante \u00e9 geralmente menor do que a da v\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o, que pode ser dividida em tr\u00eas tipos: oscila\u00e7\u00e3o de disco \u00fanico, oscila\u00e7\u00e3o de disco duplo e oscila\u00e7\u00e3o de disco m\u00faltiplo. A v\u00e1lvula de reten\u00e7\u00e3o girat\u00f3ria \u00e9 adequada para ocasi\u00f5es de grande calibre. Para v\u00e1lvulas de reten\u00e7\u00e3o de giro maiores que 80 mm instaladas na sa\u00edda da bomba, o m\u00e9todo de instala\u00e7\u00e3o horizontal deve ser adotado para reduzir o assentamento e o impacto do disco da v\u00e1lvula. Para a tubula\u00e7\u00e3o com di\u00e2metro da v\u00e1lvula de reten\u00e7\u00e3o na sa\u00edda da bomba maior ou igual a 150 mm, o bypass deve ser ajustado antes e depois da v\u00e1lvula de reten\u00e7\u00e3o para evitar danos \u00e0 superf\u00edcie de veda\u00e7\u00e3o da v\u00e1lvula de reten\u00e7\u00e3o causados pela alta press\u00e3o subir na frente da v\u00e1lvula.<br>A raz\u00e3o pela qual a v\u00e1lvula de reten\u00e7\u00e3o n\u00e3o funciona<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>A v\u00e1lvula de reten\u00e7\u00e3o \u00e9 instalada inversamente. Mostra que o meio da tubula\u00e7\u00e3o flui e a v\u00e1lvula de reten\u00e7\u00e3o bloqueia o fluxo.<\/li><li>Sele\u00e7\u00e3o ou instala\u00e7\u00e3o incorreta da v\u00e1lvula de reten\u00e7\u00e3o, como instala\u00e7\u00e3o vertical da v\u00e1lvula de reten\u00e7\u00e3o em tubula\u00e7\u00e3o vertical. Por exemplo, a pr\u00f3pria v\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o conectada por flange \u00e9 instalada verticalmente com a tubula\u00e7\u00e3o. O meio entra pela entrada de \u00e1gua e empurra o disco para cima. O meio flui atrav\u00e9s da sede da v\u00e1lvula para outra sa\u00edda da v\u00e1lvula de reten\u00e7\u00e3o. O impulso para empurrar o disco \u00e9 menor que a gravidade do disco e o disco cair\u00e1 naturalmente na sede da v\u00e1lvula. Se a v\u00e1lvula for instalada verticalmente, a gravidade do disco da v\u00e1lvula \u00e9 toda suportada pela v\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o conectada ao flange, e o meio empurra o disco da v\u00e1lvula, apenas empurra o disco da v\u00e1lvula horizontalmente, e o disco da v\u00e1lvula n\u00e3o pode cair de volta para a sede da v\u00e1lvula naturalmente, fazendo com que a v\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o conectada ao flange perca sua fun\u00e7\u00e3o.<\/li><li>As partes internas da v\u00e1lvula de reten\u00e7\u00e3o est\u00e3o enferrujadas. \u00c9 mostrado como as pe\u00e7as de conex\u00e3o dentro da v\u00e1lvula de reten\u00e7\u00e3o de oscila\u00e7\u00e3o.<\/li><li>O disco da v\u00e1lvula n\u00e3o est\u00e1 bem fechado devido ao bloqueio de corpos estranhos<\/li><li>O disco da v\u00e1lvula est\u00e1 quebrado ou tem um buraco de areia.<br><\/li><li>As v\u00e1lvulas de reten\u00e7\u00e3o produzidas pela Stv Valve Technology Group Co., limitada incluem v\u00e1lvula de reten\u00e7\u00e3o de giro, v\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o, v\u00e1lvula de reten\u00e7\u00e3o ANSI, v\u00e1lvula de reten\u00e7\u00e3o DIN, v\u00e1lvula de reten\u00e7\u00e3o de a\u00e7o fundido, v\u00e1lvula de reten\u00e7\u00e3o de a\u00e7o forjado e outros materiais.<\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"818\" height=\"462\" src=\"https:\/\/www.stvvalves.com\/wp-content\/uploads\/2020\/04\/Introduction-of-the-function-of-check-valve-and-the-analysis-of-the-reason-why-check-valve-does-not-work-1.jpg\" alt=\"\" class=\"wp-image-5594\" srcset=\"https:\/\/www.stvvalves.com\/wp-content\/uploads\/2020\/04\/Introduction-of-the-function-of-check-valve-and-the-analysis-of-the-reason-why-check-valve-does-not-work-1.jpg 818w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2020\/04\/Introduction-of-the-function-of-check-valve-and-the-analysis-of-the-reason-why-check-valve-does-not-work-1-600x339.jpg 600w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2020\/04\/Introduction-of-the-function-of-check-valve-and-the-analysis-of-the-reason-why-check-valve-does-not-work-1-300x169.jpg 300w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2020\/04\/Introduction-of-the-function-of-check-valve-and-the-analysis-of-the-reason-why-check-valve-does-not-work-1-768x434.jpg 768w, https:\/\/www.stvvalves.com\/wp-content\/uploads\/2020\/04\/Introduction-of-the-function-of-check-valve-and-the-analysis-of-the-reason-why-check-valve-does-not-work-1-705x398.jpg 705w\" sizes=\"auto, (max-width: 818px) 100vw, 818px\" \/><\/figure>","protected":false},"excerpt":{"rendered":"<p>Function of check valveThe fluid resistance of swing check valve is generally less than that of lift check valve, which can be divided into three types: single disc swing, double disc swing and multi disc swing. Swing check valve is suitable for large caliber occasions. For the swing check valve larger than 80mm installed at [&hellip;]<\/p>\n","protected":false},"author":290641,"featured_media":5593,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,1],"tags":[],"class_list":["post-5592","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news","category-news-events"],"_links":{"self":[{"href":"https:\/\/www.stvvalves.com\/pt\/wp-json\/wp\/v2\/posts\/5592","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stvvalves.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stvvalves.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/pt\/wp-json\/wp\/v2\/users\/290641"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/pt\/wp-json\/wp\/v2\/comments?post=5592"}],"version-history":[{"count":2,"href":"https:\/\/www.stvvalves.com\/pt\/wp-json\/wp\/v2\/posts\/5592\/revisions"}],"predecessor-version":[{"id":5596,"href":"https:\/\/www.stvvalves.com\/pt\/wp-json\/wp\/v2\/posts\/5592\/revisions\/5596"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/pt\/wp-json\/wp\/v2\/media\/5593"}],"wp:attachment":[{"href":"https:\/\/www.stvvalves.com\/pt\/wp-json\/wp\/v2\/media?parent=5592"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stvvalves.com\/pt\/wp-json\/wp\/v2\/categories?post=5592"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stvvalves.com\/pt\/wp-json\/wp\/v2\/tags?post=5592"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}