{"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\/fr\/introduction-of-the-function-of-check-valve-and-the-analysis-of-the-reason-why-check-valve-doesnt-work\/","title":{"rendered":"Introduction de la fonction du clapet anti-retour et analyse de la raison pour laquelle le clapet anti-retour ne fonctionne pas"},"content":{"rendered":"<p>Fonction du clapet anti-retour<br>La r\u00e9sistance aux fluides du clapet anti-retour \u00e0 battant est g\u00e9n\u00e9ralement inf\u00e9rieure \u00e0 celle du clapet anti-retour \u00e0 levage, qui peut \u00eatre divis\u00e9 en trois types : battant \u00e0 disque unique, battant \u00e0 double disque et battant \u00e0 disques multiples. Le clapet anti-retour \u00e0 battant convient aux occasions de gros calibre. Pour le clapet anti-retour \u00e0 battant de plus de 80\u00a0mm install\u00e9 \u00e0 la sortie de la pompe, la m\u00e9thode d&#039;installation horizontale doit \u00eatre adopt\u00e9e pour r\u00e9duire le si\u00e8ge et l&#039;impact du disque de soupape. Pour les canalisations dont le diam\u00e8tre du clapet anti-retour \u00e0 la sortie de la pompe est sup\u00e9rieur ou \u00e9gal \u00e0 150 mm, le by-pass doit \u00eatre r\u00e9gl\u00e9 avant et apr\u00e8s le clapet anti-retour pour \u00e9viter les dommages \u00e0 la surface d&#039;\u00e9tanch\u00e9it\u00e9 du clapet anti-retour caus\u00e9s par la haute pression. monter devant la valve.<br>La raison pour laquelle le clapet anti-retour ne fonctionne pas<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Le clapet anti-retour est install\u00e9 \u00e0 l&#039;envers. Cela montre que le fluide du pipeline s&#039;\u00e9coule et que le clapet anti-retour bloque le d\u00e9bit.<\/li><li>Mauvaise s\u00e9lection ou installation du clapet anti-retour, telle qu&#039;une installation verticale du clapet anti-retour dans une canalisation verticale. Par exemple, le clapet anti-retour \u00e0 bride connect\u00e9 lui-m\u00eame est install\u00e9 verticalement avec le pipeline. Le fluide entre par l\u2019entr\u00e9e d\u2019eau et pousse le disque vers le haut. Le fluide s&#039;\u00e9coule \u00e0 travers le si\u00e8ge de soupape vers une autre sortie du clapet anti-retour. La pouss\u00e9e pour pousser le disque est inf\u00e9rieure \u00e0 la gravit\u00e9 du disque, et le disque tombera naturellement sur le si\u00e8ge de soupape. Si la vanne est install\u00e9e verticalement, la gravit\u00e9 du disque de vanne est enti\u00e8rement support\u00e9e par le clapet anti-retour \u00e0 levage connect\u00e9 \u00e0 la bride, et le fluide pousse le disque de vanne, ne pousse le disque de vanne qu&#039;horizontalement, et le disque de vanne ne peut pas retomber sur le si\u00e8ge de vanne. Naturellement, ce qui fait perdre sa fonction au clapet anti-retour \u00e0 levage connect\u00e9 \u00e0 la bride.<\/li><li>Les parties internes du clapet anti-retour sont rouill\u00e9es. Il est repr\u00e9sent\u00e9 comme les pi\u00e8ces de connexion \u00e0 l\u2019int\u00e9rieur du clapet anti-retour \u00e0 battant.<\/li><li>Le disque de la vanne n&#039;est pas ferm\u00e9 herm\u00e9tiquement en raison du blocage de corps \u00e9trangers<\/li><li>Le disque de la vanne est cass\u00e9 ou pr\u00e9sente un trou de sable.<br><\/li><li>Les clapets anti-retour produits par Stv Valve Technology Group Co., Limited comprennent le clapet anti-retour \u00e0 battant, le clapet anti-retour \u00e0 levage, le clapet anti-retour ANSI, le clapet anti-retour DIN, le clapet anti-retour en acier moul\u00e9, le clapet anti-retour en acier forg\u00e9 et d&#039;autres mat\u00e9riaux.<\/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\/fr\/wp-json\/wp\/v2\/posts\/5592","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.stvvalves.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.stvvalves.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/fr\/wp-json\/wp\/v2\/users\/290641"}],"replies":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/fr\/wp-json\/wp\/v2\/comments?post=5592"}],"version-history":[{"count":2,"href":"https:\/\/www.stvvalves.com\/fr\/wp-json\/wp\/v2\/posts\/5592\/revisions"}],"predecessor-version":[{"id":5596,"href":"https:\/\/www.stvvalves.com\/fr\/wp-json\/wp\/v2\/posts\/5592\/revisions\/5596"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.stvvalves.com\/fr\/wp-json\/wp\/v2\/media\/5593"}],"wp:attachment":[{"href":"https:\/\/www.stvvalves.com\/fr\/wp-json\/wp\/v2\/media?parent=5592"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.stvvalves.com\/fr\/wp-json\/wp\/v2\/categories?post=5592"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.stvvalves.com\/fr\/wp-json\/wp\/v2\/tags?post=5592"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}