{"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\/fr\/check-valve-types.html","title":{"rendered":"Types de clapets anti-retour - Diff\u00e9rents types de clapets anti-retour - Fabricant"},"content":{"rendered":"<p>Les clapets anti-retour se trouvent dans presque toutes les applications industrielles, agissant comme des clapets unidirectionnels ou anti-retour. Les clapets anti-retour sont des dispositifs simples qui remplissent une fonction vitale en emp\u00eachant les flux inverses, en pr\u00e9venant les dommages et en garantissant des op\u00e9rations efficaces. Diff\u00e9rents types de clapets anti-retour sont con\u00e7us pour une application sp\u00e9cifique.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Principe de fonctionnement des clapets anti-retour<\/h2>\n\n\n\n<p>Comme d\u00e9j\u00e0 indiqu\u00e9, un clapet anti-retour fonctionne selon le principe de la pression diff\u00e9rentielle. Pour qu\u2019un clapet anti-retour s\u2019ouvre, il doit atteindre une pression minimale en amont appel\u00e9e pression de craquage. En fonction de la conception et de la taille du clapet anti-retour, la pression de craquage change. Lorsque la pression en amont atteint la pression de craquage, la vanne s&#039;ouvre, permettant au fluide d&#039;entrer. Une contre-pression est g\u00e9n\u00e9r\u00e9e lorsque la pression en amont tombe en dessous de la pression de craquage et que le flux tente de se d\u00e9placer de la sortie vers l&#039;entr\u00e9e. \u00c0 ce stade, le clapet anti-retour se ferme et le d\u00e9bit s&#039;arr\u00eate. Le m\u00e9canisme de fermeture d&#039;un clapet anti-retour varie en fonction de la conception et du type du clapet. La pression du ressort ou de la gravit\u00e9 facilite normalement le processus de fermeture.<\/p>\n\n\n\n<p>Le clapet anti-retour ne fonctionnant que dans un seul sens, les fabricants pr\u00e9voient une fl\u00e8che sur le corps du clapet indiquant le sens d&#039;\u00e9coulement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-types-of-check-valves\">Types de clapets anti-retour<\/h2>\n\n\n\n<p>Les types de clapets anti-retour ZECO peuvent \u00eatre divis\u00e9s dans les conceptions suivantes\u00a0:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/zecovalve.com\/fr\/produit\/stainless-steel-swing-check-valve\/\"><strong><mark style=\"background-color:var(--base)\" class=\"has-inline-color has-contrast-2-color\">Clapets anti-retour \u00e0 battant<\/mark><\/strong><\/a><\/h3>\n\n\n\n<p>Un clapet anti-retour \u00e0 battant de base se compose d&#039;un corps de vanne, d&#039;un chapeau et d&#039;un disque reli\u00e9 \u00e0 une charni\u00e8re. Le disque s&#039;\u00e9loigne du si\u00e8ge de soupape pour permettre l&#039;\u00e9coulement vers l&#039;avant et revient au si\u00e8ge de soupape lorsque le d\u00e9bit en amont est arr\u00eat\u00e9 pour emp\u00eacher le reflux.<\/p>\n\n\n\n<p>Le disque d&#039;un clapet anti-retour \u00e0 battant n&#039;est pas guid\u00e9 lorsqu&#039;il s&#039;ouvre ou se ferme compl\u00e8tement. De nombreuses conceptions de disques et de si\u00e8ges sont disponibles pour r\u00e9pondre aux exigences de diff\u00e9rentes applications. La vanne permet un d\u00e9bit complet et sans obstruction et se ferme automatiquement \u00e0 mesure que la pression diminue. Ces vannes sont compl\u00e8tement ferm\u00e9es lorsque le d\u00e9bit atteint z\u00e9ro pour \u00e9viter le reflux. La turbulence et la chute de pression dans la vanne sont tr\u00e8s faibles.<\/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>Codes et normes de l&#039;industrie<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Conception de la vanne\u00a0: BS 1868 \/ API 6D<\/li>\n\n\n\n<li>Test de pression\u00a0: BS 6755-I<\/li>\n\n\n\n<li>Face \u00e0 face\u00a0: ANSI B 16.10<\/li>\n\n\n\n<li>Per\u00e7age des brides\u00a0: ANSI B 16.5 \/ BS 10 Table \/ DIN \/ IS \/ JIS Std.<\/li>\n\n\n\n<li>Extr\u00e9mit\u00e9 soud\u00e9e bout \u00e0 bout\u00a0: ANSI B 16.25<\/li>\n\n\n\n<li>Face \u00e0 face\u00a0: ANSI B 16.10<\/li>\n\n\n\n<li>Extr\u00e9mit\u00e9 \u00e0 souder par douille\u00a0: ANSI B 16.11<\/li>\n\n\n\n<li>Extr\u00e9mit\u00e9 viss\u00e9e\u00a0: ANSI B 1.20.1 (BSP\/NPT)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/zecovalve.com\/fr\/produit\/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\">Clapets anti-retour \u00e0 plaquettes<\/mark><\/strong><\/a><\/h3>\n\n\n\n<p>Le clapet anti-retour de type plaquette a des dimensions face \u00e0 face courtes et un faible poids permettant une installation simple et peu encombrante entre les brides d&#039;accompagnement.<\/p>\n\n\n\n<p>Les vannes conviennent au montage entre des cols \u00e0 souder ou des brides d&#039;accompagnement de type \u00e0 enfiler de diff\u00e9rentes normes.<\/p>\n\n\n\n<p>Ils sont sp\u00e9cialement d\u00e9velopp\u00e9s pour les applications o\u00f9 une faible perte de pression est essentielle. L&#039;ouverture et la fermeture de la vanne s&#039;effectuent avec une diff\u00e9rence de pression extr\u00eamement faible sur le disque de la vanne.<\/p>\n\n\n\n<p>La combinaison de l&#039;arbre \u00e0 disque excentrique avec le si\u00e8ge du disque garantit une fermeture positive du fluide de retour. Les clapets anti-retour \u00e0 plaquettes deviennent le type de clapet anti-retour pr\u00e9f\u00e9r\u00e9 pour la plupart des applications en raison de leur conception compacte et de leur co\u00fbt relativement faible.<\/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=\"Clapet anti-retour \u00e0 double plaque\" 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\">Clapet anti-retour \u00e0 double plaque<\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">Clapet anti-retour \u00e0 levage\/clapet anti-retour \u00e0 piston<\/h3>\n\n\n\n<p>La conception du si\u00e8ge d&#039;un clapet anti-retour est similaire \u00e0 celle d&#039;un robinet \u00e0 soupape. Le disque se pr\u00e9sente g\u00e9n\u00e9ralement sous la forme d&#039;un piston ou d&#039;une bille.<\/p>\n\n\n\n<p>Les clapets anti-retour \u00e0 levage sont particuli\u00e8rement adapt\u00e9s au service haute pression avec une vitesse d&#039;\u00e9coulement \u00e9lev\u00e9e. Dans les clapets anti-retour \u00e0 lev\u00e9e, le disque est guid\u00e9 avec pr\u00e9cision et s&#039;int\u00e8gre parfaitement dans le Dashpot. Les clapets anti-retour \u00e0 levage conviennent \u00e0 une installation dans des canalisations horizontales ou verticales avec un d\u00e9bit ascendant.<\/p>\n\n\n\n<p>D\u00e9bit \u00e0 soulever Les clapets anti-retour doivent toujours entrer sous le si\u00e8ge. Lorsque le flux entre, le piston ou la bille est soulev\u00e9 dans les guides depuis le si\u00e8ge par la pression du flux ascendant. Lorsque le d\u00e9bit s&#039;arr\u00eate ou s&#039;inverse, le piston ou la bille est forc\u00e9 sur le si\u00e8ge de la vanne par le reflux et la gravit\u00e9.<\/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\">Clapets anti-retour \u00e0 bille<\/h3>\n\n\n\n<p>Les clapets anti-retour \u00e0 bille sont simples et couramment utilis\u00e9s sur les petites pompes et les syst\u00e8mes \u00e0 faible hauteur de chute. Les clapets anti-retour \u00e0 bille impliquent un clapet \u00e0 bille sph\u00e9rique \u00e0 ressort ou flottant librement pour se fermer \u00e0 des pressions inf\u00e9rieures \u00e0 la pression de fissuration. Le si\u00e8ge d&#039;\u00e9tanch\u00e9it\u00e9 est conique pour guider la bille dans le si\u00e8ge et cr\u00e9er une \u00e9tanch\u00e9it\u00e9 positive. Cependant, ces valves peuvent facilement s\u2019user en raison d\u2019une utilisation prolong\u00e9e et n\u00e9cessitent un entretien fr\u00e9quent.<\/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\">Clapets anti-retour \u00e0 disque inclinable<\/h3>\n\n\n\n<p>Le clapet anti-retour \u00e0 disque basculant ressemble en apparence \u00e0 une vanne papillon excentrique. Le corps de la vanne est \u00e0 double bride et de courte longueur. Le disque est plac\u00e9 via un arbre positionn\u00e9 de mani\u00e8re excentrique par rapport \u00e0 l&#039;axe central du corps dans les axes horizontal et vertical.<\/p>\n\n\n\n<p>La double excentricit\u00e9 de l&#039;arbre fait que la partie inf\u00e9rieure du disque occupe une plus grande surface dans le trajet d&#039;\u00e9coulement. Par cons\u00e9quent, le disque commence \u00e0 s&#039;ouvrir \u00e0 des d\u00e9bits tr\u00e8s faibles. Par cons\u00e9quent, le clapet anti-retour \u00e0 disque basculant est couramment utilis\u00e9 dans les syst\u00e8mes de pompage \u00e0 faible d\u00e9bit et pour les d\u00e9bits puls\u00e9s.<\/p>\n\n\n\n<p>Lors de l&#039;inversion du flux, le disque se ferme par gravit\u00e9. La partie sup\u00e9rieure du disque, au-dessus de l&#039;axe de l&#039;arbre, pousse \u00e0 contre-courant, agissant ainsi comme un frein hydraulique qui amortit le disque lorsqu&#039;il revient en position ferm\u00e9e. Les vannes \u00e0 disque basculant peuvent \u00eatre fournies avec des leviers et des poids en option pour ajuster les caract\u00e9ristiques de fermeture de la vanne. A ce titre, les clapets anti-retour \u00e0 disque basculant sont bien adapt\u00e9s pour r\u00e9duire les risques de coups de b\u00e9lier.<\/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\">Clapet anti-retour \u00e0 papillon<\/h3>\n\n\n\n<p>Un clapet anti-retour papillon est un clapet anti-retour \u00e0 double plaque, un clapet anti-retour \u00e0 disque pliant, un clapet anti-retour \u00e0 double disque ou \u00e0 disque divis\u00e9. Comme son nom l&#039;indique, deux moiti\u00e9s du disque se d\u00e9placent vers la ligne m\u00e9diane avec le flux vers l&#039;avant, et avec le flux inverse, deux moiti\u00e9s s&#039;ouvrent et reposent sur le si\u00e8ge pour fermer le flux.<\/p>\n\n\n\n<p>Ces types de clapets anti-retour conviennent aux syst\u00e8mes de liquide basse pression ainsi qu&#039;aux syst\u00e8mes de tuyauterie de gaz. Sa construction l\u00e9g\u00e8re et compacte en fait un choix pr\u00e9f\u00e9rable lorsque l&#039;espace et la commodit\u00e9 sont importants. En outre, il est de 80 \u00e0 90% plus l\u00e9ger que le clapet anti-retour conventionnel \u00e0 corps entier, et le co\u00fbt d&#039;installation et de maintenance est inf\u00e9rieur \u00e0 celui des autres types.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Clapet anti-retour \u00e0 membrane<\/h3>\n\n\n\n<p>Les clapets anti-retour \u00e0 membrane sont constitu\u00e9s de diaphragmes flexibles en caoutchouc ou de disques auto-centrants pour emp\u00eacher le reflux. Lorsque la pression d&#039;entr\u00e9e augmente, le diaphragme s&#039;ouvre et le d\u00e9bit commence. Il existe deux types de clapets anti-retour \u00e0 membrane\u00a0;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vanne normalement ouverte flottante<\/li>\n\n\n\n<li>Vanne \u00e0 flexion fixe normalement ferm\u00e9e<\/li>\n<\/ul>\n\n\n\n<p>Dans le cas de vannes \u00e0 membrane normalement ouvertes, aucune pression de craquage n&#039;est requise car la membrane en \u00e9lastom\u00e8re auto-centrante flotte librement. Cependant, ils ont besoin d\u2019une contre-pression pour fermer la vanne. D&#039;un autre c\u00f4t\u00e9, les vannes normalement ferm\u00e9es ont besoin d&#039;une certaine pression d&#039;entr\u00e9e pour vaincre l&#039;\u00e9lasticit\u00e9 du diaphragme fixe.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Clapet anti-retour<\/h3>\n\n\n\n<p>Un clapet anti-retour est constitu\u00e9 de deux vannes int\u00e9gr\u00e9es dans un seul corps. Il peut servir de vanne \u00e0 soupape \u00e0 des fins d&#039;isolement ou de r\u00e9gulation. Encore une fois, il peut agir comme un clapet anti-retour pour emp\u00eacher le reflux. Contrairement aux autres clapets anti-retour, le clapet anti-retour Stop dispose d&#039;un m\u00e9canisme de commande externe suppl\u00e9mentaire dans le sens perpendiculaire ou angulaire. Les clapets anti-retour sont populaires dans les services de vapeur tels que les centrales \u00e9lectriques, la circulation des chaudi\u00e8res, les g\u00e9n\u00e9rateurs de vapeur, le refroidissement des turbines et les syst\u00e8mes de s\u00e9curit\u00e9.<\/p>\n\n\n\n<!-- Andy:h-related-tags -->\n<h2 id=\"h-related-tags\">Balises associ\u00e9es :<\/h2>\n<!-- \/Andy:h-related-tags -->\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/\">Soupape ZECO<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/introduction-of-epdm-nbr-butterfly-valve-seat-industrial-valve-information-news-zeco-valve.html\/\">Robinet \u00e0 papillon NBR<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/advantages-and-disadvantages-of-globe-valves.html\/\">Qu'est-ce qu'un robinet \u00e0 soupape ?<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/difference-between-gate-valves-and-ball-valves.html\/\">Vanne et robinet \u00e0 boisseau sph\u00e9rique<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/what-is-an-axial-flow-silent-check-valve.html\/\">Qu'est-ce qu'un clapet anti-retour axial ?<\/a>\n\n<\/div>\n\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/difference-between-gate-valve-and-butterfly-valve.html\/\">Diff\u00e9rence entre la vanne \u00e0 vanne et la vanne papillon<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/the-difference-between-globe-valve-and-ball-valve.html\/\">Robinet \u00e0 soupape et robinet \u00e0 bille<\/a>\n\n<\/div>\n\n\n\n<div class=\"re_main\">\n<a href=\"https:\/\/zecovalve.com\/fr\/history-of-automatic-control-valve-zeco-valve-industrial-valve-manufacturer.html\/\">Que sont les vannes de r\u00e9gulation automatique ?<\/a>\n\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Les clapets anti-retour sont pr\u00e9sents dans presque toutes les applications industrielles en tant que clapets unidirectionnels ou clapets anti-retour. Les clapets anti-retour sont des dispositifs simples qui ... <a title=\"Types de clapets anti-retour \u2013 Fabricant de diff\u00e9rents types de clapets anti-retour\" class=\"read-more\" href=\"https:\/\/zecovalve.com\/fr\/check-valve-types.html\" aria-label=\"Plus sur Types de clapets anti-retour \u2013 Fabricant de diff\u00e9rents types de clapets anti-retour\">Lire plus<\/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\/fr\/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\/fr\/check-valve-types.html\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\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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