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margin-left: 16px;\n margin-right: 16px\n }\n\n [lang=fi] .main-nav nav .navbar-nav .nav-item.has_box .sub_box .sub_item a {\n font-size: 15px\n }\n\n [lang=pl] .features .welcome_desc p {\n font-size: 24px\n }\n\n @media only screen and (max-width:1199px) {\n .topbar {\n border-bottom: none\n }\n }\n\n @media only screen and (max-width:767px) {\n .language-select .dropdown-menu {\n left: 0;\n right: auto;\n height: 70vh\n }\n\n .newsletter-content .default-section-heading h3 {\n font-size: 28px;\n line-height: 32px;\n padding-bottom: 18px\n }\n }\n <\/style>\n<script async src=\"https:\/\/www.googletagmanager.com\/gtag\/js?id=G-5WHCGWBZF2\"><\/script><script defer>\n function gtag() {\n dataLayer.push(arguments)\n }\n window.dataLayer = window.dataLayer || [], gtag(\"js\", new Date), gtag(\"config\", \"G-5WHCGWBZF2\"), gtag(\"config\", \"AW-10818223058\")\n <\/script><script defer>\n function gtag_report_conversion_1(n) {\n return gtag(\"event\", \"conversion\", {\n send_to: 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La temp\u00e9rature du fluide doit \u00eatre inf\u00e9rieure \u00e0 la temp\u00e9rature d\u2019\u00e9talonnage de l\u2019\u00e9lectrovanne s\u00e9lectionn\u00e9e. La diff\u00e9rence de pression de service maximale doit \u00eatre inf\u00e9rieure \u00e0 la pression d\u2019\u00e9talonnage maximale de l\u2019\u00e9lectrovanne; g\u00e9n\u00e9ralement, l\u2019\u00e9lectrovanne fonctionne dans un sens, donc payez atte<\/p> <a class=\"read-more-btn\" href=\"https:\/\/fr.covna-china.com\/article\/matters-needing-attention-in-the-selection-of-solenoid-valves.html\">Lire la suite >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/fr.covna-china.com\/article\/classification-of-solenoid-valves.html\" title=\"Classification des \u00e9lectrovannes\"> <img class=\"lazy\" alt=\"Classification des \u00e9lectrovannes\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1637154256_1COVNA-HK0018-Series-Tri-Clamp-Food-Grade-Sanitary-Solenoid-Valve.jpg?imageView2\/1\/w\/376\/h\/251\/format\/webp\" width=\"376\" height=\"251\"><\/a>\n <div class=\"blog-text\">\n <div class=\"blog-date\">\n <ul>\n<li> <i class=\"far fa-calendar-alt\"><\/i> <span>29 juin 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/fr.covna-china.com\/article\/classification-of-solenoid-valves.html\" title=\"Classification des \u00e9lectrovannes\">Classification des \u00e9lectrovannes<\/a> <\/h4>\n <p>1. Les \u00e9lectrovannes sont divis\u00e9es en trois cat\u00e9gories en principe: 1) \u00c9lectrovanne \u00e0 action directe: Principe: Lorsqu\u2019elle est sous tension, la bobine \u00e9lectromagn\u00e9tique g\u00e9n\u00e8re une force \u00e9lectromagn\u00e9tique pour soulever l\u2019\u00e9l\u00e9ment de fermeture du si\u00e8ge de la vanne et la vanne s\u2019ouvre; lorsque l\u2019alimentation est coup\u00e9e, la force \u00e9lectromagn\u00e9tique dispara\u00eet, le ressort appuie sur l\u2019\u00e9l\u00e9ment de fermeture du si\u00e8ge de la soupape et la vanne se ferme. Caract\u00e9ristiques: Il ne peut pas fonctionner<\/p> <a class=\"read-more-btn\" href=\"https:\/\/fr.covna-china.com\/article\/classification-of-solenoid-valves.html\">Lire la suite >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/fr.covna-china.com\/article\/solenoid-valve-faults-and-troubleshooting-methods.html\" title=\"D\u00e9fauts d\u2019\u00e9lectrovanne et m\u00e9thodes de d\u00e9pannage\"> <img class=\"lazy\" alt=\"D\u00e9fauts d\u2019\u00e9lectrovanne et m\u00e9thodes de d\u00e9pannage\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1637137170_covnaactuator.com.png?imageView2\/1\/w\/376\/h\/251\/format\/webp\" width=\"376\" height=\"251\"><\/a>\n <div class=\"blog-text\">\n <div class=\"blog-date\">\n <ul>\n<li> <i class=\"far fa-calendar-alt\"><\/i> <span>29 juin 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/fr.covna-china.com\/article\/solenoid-valve-faults-and-troubleshooting-methods.html\" title=\"D\u00e9fauts d\u2019\u00e9lectrovanne et m\u00e9thodes de d\u00e9pannage\">D\u00e9fauts d\u2019\u00e9lectrovanne et m\u00e9thodes de d\u00e9pannage<\/a> <\/h4>\n <p>1. L\u2019\u00e9lectrovanne ne fonctionne pas apr\u00e8s avoir \u00e9t\u00e9 mise sous tension V\u00e9rifiez si le c\u00e2blage d\u2019alimentation est d\u00e9fectueux, le re-c\u00e2blage et la connexion du connecteur V\u00e9rifiez si la tension d\u2019alimentation est dans la plage de travail -, ajustez la plage de position normale Si la bobine est dessoud\u00e9e et re-soud\u00e9e La bobine est court-circuit\u00e9e, remplacez la bobine Si la diff\u00e9rence de pression de service est inappropri\u00e9e, ajuster la diff\u00e9rence de pression<\/p> <a class=\"read-more-btn\" href=\"https:\/\/fr.covna-china.com\/article\/solenoid-valve-faults-and-troubleshooting-methods.html\">Lire la suite >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/fr.covna-china.com\/article\/how-to-quickly-judge-the-quality-of-solenoid-valve-on-site.html\" title=\"Comment juger rapidement de la qualit\u00e9 de l\u2019\u00e9lectrovanne sur site\"> <img class=\"lazy\" alt=\"Comment juger rapidement de la qualit\u00e9 de l\u2019\u00e9lectrovanne sur site\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1637890870_Solenoid-Valve.jpg?imageView2\/1\/w\/376\/h\/251\/format\/webp\" width=\"376\" height=\"251\"><\/a>\n <div class=\"blog-text\">\n <div class=\"blog-date\">\n <ul>\n<li> <i class=\"far fa-calendar-alt\"><\/i> <span>29 juin 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/fr.covna-china.com\/article\/how-to-quickly-judge-the-quality-of-solenoid-valve-on-site.html\" title=\"Comment juger rapidement de la qualit\u00e9 de l\u2019\u00e9lectrovanne sur site\">Comment juger rapidement de la qualit\u00e9 de l\u2019\u00e9lectrovanne sur site<\/a> <\/h4>\n <p>Tout d\u2019abord, v\u00e9rifiez si la bobine de sol\u00e9no\u00efde de l\u2019\u00e9lectrovanne est d\u00e9fectueuse. Donnez \u00e0 la vanne \u00e0 deux positions un signal d\u2019ouverture ou de fermeture sur le DCS, puis voyez si l\u2019\u00e9lectrovanne gagne ou perd de l\u2019\u00e9nergie. G\u00e9n\u00e9ralement, vous pouvez \u00e9couter le son sur les lieux. Si vous ne pouvez pas l\u2019entendre, il doit y avoir un probl\u00e8me avec la bobine. Quant \u00e0 l\u2019\u00e9lectrovanne elle-m\u00eame, y a-t-il un probl\u00e8me? S\u2019il y a un probl\u00e8me avec la bobine sol\u00e9no\u00efde, d\u2019abord chec<\/p> <a class=\"read-more-btn\" href=\"https:\/\/fr.covna-china.com\/article\/how-to-quickly-judge-the-quality-of-solenoid-valve-on-site.html\">Lire la suite >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/fr.covna-china.com\/article\/how-electric-ball-valve-are-used-in-cold-water.html\" title=\"Comment les vannes \u00e0 boisseau sph\u00e9rique \u00e9lectriques sont utilis\u00e9es dans l\u2019eau froide\"> <img class=\"lazy\" alt=\"Comment les vannes \u00e0 boisseau sph\u00e9rique \u00e9lectriques sont utilis\u00e9es dans l\u2019eau froide\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1637137201_electric-3-piece-flange-ball-valve-300x300.png?imageView2\/1\/w\/376\/h\/251\/format\/webp\" width=\"376\" height=\"251\"><\/a>\n <div class=\"blog-text\">\n <div class=\"blog-date\">\n <ul>\n<li> <i class=\"far fa-calendar-alt\"><\/i> <span>30 mai 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/fr.covna-china.com\/article\/how-electric-ball-valve-are-used-in-cold-water.html\" title=\"Comment les vannes \u00e0 boisseau sph\u00e9rique \u00e9lectriques sont utilis\u00e9es dans l\u2019eau froide\">Comment les vannes \u00e0 boisseau sph\u00e9rique \u00e9lectriques sont utilis\u00e9es dans l\u2019eau froide<\/a> <\/h4>\n <p>Les vannes \u00e0 boisseau sph\u00e9rique \u00e9lectriques sont utilis\u00e9es pour fournir un moyen efficace et fiable de fournir de l\u2019eau froide aux maisons ou aux entreprises. Vannes \u00e0 boisseau sph\u00e9rique \u00e9lectriques pour l\u2019eau froide Les propri\u00e9taires ont de nombreuses options lors de l\u2019installation de chauffe-eau automatiques. Le mod\u00e8le traditionnel peut exiger que les individus demandent \u00e0 un professionnel de venir installer le syst\u00e8me. Cependant, l\u2019utilisation d\u2019un chauffe-eau \u00e9lectrique peut r\u00e9duire consid\u00e9rablement les co\u00fbts, car l\u2019ensemble du processus peut<\/p> <a class=\"read-more-btn\" href=\"https:\/\/fr.covna-china.com\/article\/how-electric-ball-valve-are-used-in-cold-water.html\">Lire la suite >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/fr.covna-china.com\/article\/electric-control-valve-why-you-should-consider-electric-control-of-air-cooling.html\" title=\"Vanne de contr\u00f4le \u00e9lectrique - Pourquoi vous devriez envisager un contr\u00f4le \u00e9lectrique du refroidissement par air\"> <img class=\"lazy\" alt=\"Vanne de contr\u00f4le \u00e9lectrique - Pourquoi vous devriez envisager un contr\u00f4le \u00e9lectrique du refroidissement par air\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1636956448_163013411092575.jpg?imageView2\/1\/w\/376\/h\/251\/format\/webp\" width=\"376\" height=\"251\"><\/a>\n <div class=\"blog-text\">\n <div class=\"blog-date\">\n <ul>\n<li> <i class=\"far fa-calendar-alt\"><\/i> <span>30 mai 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/fr.covna-china.com\/article\/electric-control-valve-why-you-should-consider-electric-control-of-air-cooling.html\" title=\"Vanne de contr\u00f4le \u00e9lectrique - Pourquoi vous devriez envisager un contr\u00f4le \u00e9lectrique du refroidissement par air\">Vanne de contr\u00f4le \u00e9lectrique - Pourquoi vous devriez envisager un contr\u00f4le \u00e9lectrique du refroidissement par air<\/a> <\/h4>\n <p>Le syst\u00e8me de commande de vanne le plus courant et le plus couramment utilis\u00e9 est le syst\u00e8me de commande de vanne \u00e9lectrique \u00e0 2 voies de 9 volts. Vanne \u00e9lectrique 2 voies 9-24V Il s\u2019agit d\u2019un dispositif de contr\u00f4le tr\u00e8s utile qui aide \u00e0 simplifier la conception de la vanne en permettant un meilleur contr\u00f4le, une plus grande flexibilit\u00e9 et moins d\u2019erreurs m\u00e9caniques. Les commandes motoris\u00e9es sont tr\u00e8s utiles car elles peuvent \u00eatre contr\u00f4l\u00e9es de mani\u00e8re extensive. 9-24v vanne \u00e9lectrique 2 voies 9-24v 2 voies \u00e9lectrique valv \u00e9lectrique<\/p> <a class=\"read-more-btn\" href=\"https:\/\/fr.covna-china.com\/article\/electric-control-valve-why-you-should-consider-electric-control-of-air-cooling.html\">Lire la suite >><\/a>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <div class=\"col-lg-12 col-md-12 col-12 pagination-box wow fadeInUp\">\n <nav aria-label=\"Page navigation example\"><ul class=\"pagination\">\n<li class=\"active\"><a href=\"javascript:void(0);\">1<\/a><\/li>\n <li><a href=\"https:\/\/fr.covna-china.com\/articles\/industry-news\/2.html\">2<\/a><\/li>\n <li><a href=\"https:\/\/fr.covna-china.com\/articles\/industry-news\/3.html\">3<\/a><\/li>\n <li><a href=\"https:\/\/fr.covna-china.com\/articles\/industry-news\/4.html\">4<\/a><\/li>\n <li><a 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class=\"copyright\">\n <div class=\"container\">\n <p class=\"wow fadeInUp\"> <a href=\"https:\/\/fr.covna-china.com\/page\/contact-us.html\" target=\"_blank\">Politique de confidentialit\u00e9<\/a><br>Droits d\u2019auteur 2021 GuangDong COVNA Co., Ltd.<\/p>\n <\/div>\n <\/div>\n <div class=\"rightmenu\">\n <ul>\n<li class=\"r-icon envelope\"> <a data-fancybox data-src=\"#QuickInquiryModal\" href=\"javascript:;\" class=\"dg-btn dg-theme\">Demande rapide<\/a> <i class=\"fa fa-envelope\"><\/i> <\/li>\n <li class=\"r-icon\"> <a href=\"https:\/\/www.linkedin.com\/in\/covnavalves\/\" target=\"_blank\"><i class=\"fab fa-linkedin-in\"><\/i><\/a> <\/li>\n <li class=\"r-icon\"><a href=\"https:\/\/www.facebook.com\/automaticcontrolvalve\" target=\"_blank\"><i class=\"fab fa-facebook\"><\/i><\/a><\/li>\n <li class=\"r-icon\"><a href=\"https:\/\/www.youtube.com\/channel\/UC3EDFKt6qoQCCyuun5Tfwwg\" target=\"_blank\"><i class=\"fab fa-youtube\"><\/i><\/a><\/li>\n <li class=\"r-icon\">\n <div class=\"icon\"><i class=\"fab fa-whatsapp\"><\/i><\/div>\n <div class=\"side-link\"> <a href=\"https:\/\/api.whatsapp.com\/send?phone=+86%2013556641138&text=Hello\" target=\"_blank\">+86 13556641138<\/a> <\/div>\n <\/li>\n <li class=\"r-top\"><span class=\"standard-arrow-right02 arrow-right02\"><\/span><\/li>\n <\/ul>\n<\/div>\n <section class=\"quick-inquiry-section\" style=\"display:none\"><div class=\"container\">\n <div id=\"QuickInquiryModal\" style=\"width:90%;max-width:800px\">\n <h2>Demande rapide<\/h2>\n <form class=\"form-f781ef6ebf479c4e76ebb85d436cdfd7\" action=\"\/\/inquiry.digoodcms.com\/api\/covna\" method=\"post\"> <input name=\"page\" type=\"hidden\" value><input id=\"backpage\" name=\"backpage\" type=\"hidden\" value><div class=\"form-group\"> <label>Nom:<\/label> <input type=\"text\" name=\"contact[Name]\" class=\"form-control\" placeholder=\"Entrez votre nom\">\n<\/div>\n <div class=\"form-group\"> <label>*Courriel :<\/label> <input type=\"email\" name=\"email\" 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