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14px\n }\n\n [lang=uk] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=vi] .main-nav nav .navbar-nav .nav-item .dropdown-menu {\n max-width: 310px\n }\n\n [lang=uk] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=vi] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box {\n max-width: 100%\n }\n\n [lang=hu] .main-nav nav .navbar-nav>.nav-item,\n [lang=iw] .main-nav nav .navbar-nav>.nav-item {\n margin-left: 20px;\n margin-right: 20px\n }\n\n [lang=el] .main-nav nav .navbar-nav>.nav-item {\n margin-left: 10px;\n margin-right: 10px\n }\n\n [lang=fi] .main-nav nav .navbar-nav>.nav-item {\n 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 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ventil\">\n<\/div> <span>Pneumatisk aktiveret ventil<\/span>\n <\/a> <\/div>\n <div class=\"col-lg-4 col-md-4 col-sm-6 col-xs-12 col-12 sub_item\"> <a href=\"https:\/\/da.covna-china.com\/products\/solenoid-valve.html\">\n <div class=\"sub_item_img\"> <img src=\"\/\/v4-upload.goalsites.com\/728\/image_1637133618_Solenoid-valve.jpg?imageView2\/1\/w\/80\/h\/80\/format\/webp\" alt=\"Magnetventil\">\n<\/div> <span>Magnetventil<\/span>\n <\/a> <\/div>\n <div class=\"col-lg-4 col-md-4 col-sm-6 col-xs-12 col-12 sub_item\"> <a href=\"https:\/\/da.covna-china.com\/products\/manual-valve.html\">\n <div class=\"sub_item_img\"> <img src=\"\/\/v4-upload.goalsites.com\/728\/image_1637133592_Manual-valve.jpg?imageView2\/1\/w\/80\/h\/80\/format\/webp\" alt=\"Manuel ventil\">\n<\/div> <span>Manuel ventil<\/span>\n <\/a> <\/div>\n <div class=\"col-lg-4 col-md-4 col-sm-6 col-xs-12 col-12 sub_item\"> <a href=\"https:\/\/da.covna-china.com\/products\/control-valve.html\">\n <div class=\"sub_item_img\"> 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<div class=\"w1200\">\n <div class=\"uni-banner-text\">\n <h1>Biomedicin<\/h1>\n <ul>\n<li><a href=\"https:\/\/da.covna-china.com\/\">Hjem<\/a><\/li>\n <li><span>Biomedicin<\/span><\/li>\n <\/ul>\n<\/div>\n <\/div>\n <\/div>\n <\/section><script>\n ! function() {\n window.location.origin;\n var t = window.location.hostname,\n s = \"English\",\n e = document.querySelector(\"#lang_icon\"),\n a = document.querySelector(\"#lang_text\");\n \/^(fr\\.)\/.test(t) ? 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Landbrugsvanding kan optimere vandstr\u00f8mmen ved hj\u00e6lp af forskellige driv- og reguleringsventiler for at sikre, at kun den optimale m\u00e6ngde vand bruges og ikke spildes. Selvf\u00f8lgelig kan vores COVNA levere disse pneumatiske og elektriske ventiler til sm\u00e5 og store vandingsapplikationer. I denne artikel l\u00e6rer vi, hvordan man v\u00e6lger og anvender COVNA-aktuatorer til at regulere vandstr\u00f8mmen i vandingspraksis.<br><br>Hvor kan aktuatorer bruges i landbrugsvandingsindustrien?<br><br>Elektriske ventiler og pneumatiske ventiler har en bred vifte af applikationer i landbrugsvandingsindustrien, men det kr\u00e6ver en vis t\u00e6nkning og overvejelse at finde deres bedste anvendelse. Den st\u00f8rste anvendelse er at kontrollere vandstr\u00f8mmen gennem automatiserede kontrolsl\u00f8jfer. Disse sl\u00f8jfer kr\u00e6ver fugtighedssensorer til at analysere jordens fugtighedsniveau for at \u00e5bne \/ lukke vandventilen i overensstemmelse hermed. I dette tilf\u00e6lde kan der anvendes en t\u00e6nd\/sluk- eller flowreguleringsventil.<br><br>Ved brug af reguleringsventiler er ventiler som stopventiler og vinkelventiler normalt det f\u00f8rste valg i landbrugsvanding. Sammenlignet med andre ventiler har disse ventiler en strammere lukning. COVNA-aktuatorer er velegnede til applikationer med disse ventiler, fordi de opfylder krav som drejningsmoment, generel slidstyrke osv., Fordi disse applikationer kan kr\u00e6ve, at aktuatoren er udend\u00f8rs osv. 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<div class=\"col-lg-4\"> <a class=\"newsletter-btn\" data-fancybox data-src=\"#QuickInquiryModal\" href=\"javascript:;\">Send foresp\u00f8rgsel<\/a> <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <div class=\"footer pb-100\">\n <div class=\"w1200 clearfix\">\n <div class=\"footer-logo-area wow fadeInUp\"> <a href=\"https:\/\/da.covna-china.com\/\"><img src=\"\/\/v4-upload.goalsites.com\/728\/image_1629961960_logo1.png\" alt=\"logo\" width=\"216\" height=\"37\"><\/a>\n <p>Forpligtet til global udbyder af automatiseringsapplikationer<\/p>\n <div class=\"footer-social-links\">\n <ul>\n<li> <a href=\"https:\/\/www.linkedin.com\/in\/covnavalves\/\" target=\"_blank\"><i class=\"fab fa-linkedin-in\"><\/i><\/a> <\/li>\n <li> <a href=\"https:\/\/twitter.com\/valve_covna\" target=\"_blank\"><i class=\"fab fa-twitter\"><\/i><\/a> <\/li>\n <li> <a href=\"https:\/\/www.youtube.com\/channel\/UC3EDFKt6qoQCCyuun5Tfwwg\" target=\"_blank\"><i class=\"fab fa-youtube\"><\/i><\/a> <\/li>\n <li> <a 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fa-long-arrow-alt-right\"><\/i>Leve<\/a> <\/li>\n <li> <a href=\"https:\/\/da.covna-china.com\/encyclopedias\/encyclopedia.html\"><i class=\"fas fa-long-arrow-alt-right\"><\/i>Encyklop\u00e6di<\/a> <\/li>\n <li> <a href=\"https:\/\/da.covna-china.com\/page\/contact-us.html\"><i class=\"fas fa-long-arrow-alt-right\"><\/i>Kontakt os<\/a> <\/li>\n <\/ul>\n<\/div>\n <div class=\"footer-links footer-contact wow fadeInUp\">\n <h3 class=\"ft_title\">Kontakt os<\/h3>\n <ul>\n<li> <i class=\"fa fa-envelope\"><\/i>\n <p>E-mail:<\/p> <a href=\"mailto:inquiry@covna-china.com\">inquiry@covna-china.com<\/a>\n <\/li>\n <li> <i class=\"fas fa-phone-alt\" style=\"font-size:20px\"><\/i>\n <p>Telefon:<\/p> <a href=\"tel:8613556641138\">+86-1355-6641138<\/a>\n <\/li>\n <li> <i class=\"fas fa-map-marker-alt\" style=\"font-size:20px\"><\/i>\n <p>Sted:<\/p>\n <p>Longchang Micro-Chuangyuan, Dongcheng District Dongguan City, Kina, 523000<\/p>\n <\/li>\n <\/ul>\n<\/div>\n <div class=\"footer-links footer-form wow fadeInUp\">\n <h3>Abonnere<\/h3>\n <p>Abonner p\u00e5 vores nyhedsbrev for at f\u00e5 vores opdaterede nyheder!<\/p>\n <form class=\"form-3b52d116d103db2f52fb4903610e2c97\" action=\"https:\/\/inquiry.digoodcms.com\/api\/covna\" method=\"POST\"> <input name=\"page\" type=\"hidden\" value><input id=\"backpage2\" name=\"backpage\" type=\"hidden\" value><div class=\"input-group\"> <input type=\"text\" name=\"contact[fullname]\" class=\"form-control2\" required placeholder=\"*Dit navn\">\n<\/div>\n <div class=\"input-group\"> <input type=\"email\" name=\"email\" class=\"form-control2\" placeholder=\"*Din e-mail\" required pattern=\"[-\\w]+@[-\\w]+(\\.[-\\w]+)+\">\n<\/div>\n <div class=\"input-group\"> <textarea name=\"message\" rows=\"3\" class=\"form-control2\" minlength=\"10\" maxlength=\"2000\" required placeholder=\"*Meddelelse\"><\/textarea>\n<\/div>\n <div class=\"input-group\"> <button class=\"btn\" type=\"submit\">sende<\/button> <\/div> <input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_ipAddress\" name=\"custom[ipAddress]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_countryName\" name=\"custom[countryName]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_regionName\" name=\"custom[regionName]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_cityName\" name=\"custom[cityName]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_countryCode\" name=\"custom[countryCode]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_zipCode\" name=\"custom[zipCode]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_latitude\" name=\"custom[latitude]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_longitude\" name=\"custom[longitude]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_timeZone\" name=\"custom[timeZone]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_ipAddress\" name=\"geoip[ipAddress]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_countryName\" name=\"geoip[countryName]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_countryCode\" name=\"geoip[countryCode]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_regionName\" name=\"geoip[regionName]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_cityName\" name=\"geoip[cityName]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_zipCode\" name=\"geoip[zipCode]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_latitude\" name=\"geoip[latitude]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_longitude\" name=\"geoip[longitude]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_timeZone\" name=\"geoip[timeZone]\" type=\"hidden\" value><input name=\"useragent[browser]\" type=\"hidden\" value=\"Chrome[86.0.4240.75]\"><input name=\"useragent[platform]\" type=\"hidden\" value=\"Windows 10\"><input name=\"useragent[lang]\" type=\"hidden\" value=\"zh-CN,zh;q=0.9,ja;q=0.8,en-US;q=0.7,en;q=0.6,zh-TW;q=0.5\"><input name=\"useragent[mobile]\" type=\"hidden\" value=\"No\"><input name=\"useragent[agent_string]\" type=\"hidden\" value=\"Mozilla\/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/86.0.4240.75 Safari\/537.36\">\n<\/form>\n <\/div>\n <\/div>\n <\/div>\n <div class=\"copyright\">\n <div class=\"container\">\n <p class=\"wow fadeInUp\"> <a href=\"https:\/\/da.covna-china.com\/page\/contact-us.html\" target=\"_blank\">Politik om beskyttelse af personlige oplysninger<\/a><br>Ophavsret 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\">Hurtig foresp\u00f8rgsel<\/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>Hurtig foresp\u00f8rgsel<\/h2>\n <form class=\"form-3b52d116d103db2f52fb4903610e2c97\" 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>Navn:<\/label> <input type=\"text\" name=\"contact[Name]\" class=\"form-control\" placeholder=\"Indtast dit navn\">\n<\/div>\n <div class=\"form-group\"> <label>*E-mail:<\/label> <input type=\"email\" name=\"email\" class=\"form-control\" placeholder=\"Indtast din e-mail\" required=\"required\" pattern=\"[-\\w\\.]+@[-\\w]+(\\.[-\\w]+)+\">\n<\/div>\n <div class=\"form-group\"> <label>Telefon:<\/label> <input type=\"text\" name=\"contact[Phone]\" class=\"form-control\" placeholder=\"Indtast telefonnummer\" 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name=\"custom[countryCode]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_zipCode\" name=\"custom[zipCode]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_latitude\" name=\"custom[latitude]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_longitude\" name=\"custom[longitude]\" type=\"hidden\" value><input class=\"custom-ae03dcb8eaf7b97bb1132859c422e479_timeZone\" name=\"custom[timeZone]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_ipAddress\" name=\"geoip[ipAddress]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_countryName\" name=\"geoip[countryName]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_countryCode\" name=\"geoip[countryCode]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_regionName\" name=\"geoip[regionName]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_cityName\" name=\"geoip[cityName]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_zipCode\" name=\"geoip[zipCode]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_latitude\" name=\"geoip[latitude]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_longitude\" name=\"geoip[longitude]\" type=\"hidden\" value><input class=\"geo-663c40799e8ded1932de100dcf5dbedf_timeZone\" name=\"geoip[timeZone]\" type=\"hidden\" value><input name=\"useragent[browser]\" type=\"hidden\" value=\"Chrome[86.0.4240.75]\"><input name=\"useragent[platform]\" type=\"hidden\" value=\"Windows 10\"><input name=\"useragent[lang]\" type=\"hidden\" value=\"zh-CN,zh;q=0.9,ja;q=0.8,en-US;q=0.7,en;q=0.6,zh-TW;q=0.5\"><input name=\"useragent[mobile]\" type=\"hidden\" value=\"No\"><input name=\"useragent[agent_string]\" type=\"hidden\" value=\"Mozilla\/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/86.0.4240.75 Safari\/537.36\">\n<\/form>\n <\/div>\n <\/div>\n <\/section><script src=\"https:\/\/cdn.staticfile.org\/twitter-bootstrap\/4.5.0\/js\/bootstrap.min.js\"><\/script><script src=\"https:\/\/cdn.staticfile.org\/wow\/1.1.2\/wow.min.js\"><\/script><script src=\"https:\/\/cdn.staticfile.org\/Swiper\/6.0.4\/swiper-bundle.min.js\"><\/script><script src=\"https:\/\/cdn.staticfile.org\/jquery.lazyload\/1.9.1\/jquery.lazyload.min.js\"><\/script><script src=\"https:\/\/cdn.staticfile.org\/fancybox\/3.5.7\/jquery.fancybox.min.js\"><\/script><script type=\"text\/javascript\" src=\"\/\/v4-assets.goalsites.com\/huangzd\/plugins\/jqueryCountup20161120\/js\/jquery.waypoints.min.js\"><\/script><script type=\"text\/javascript\" src=\"\/\/v4-assets.goalsites.com\/huangzd\/plugins\/jqueryCountup20161120\/js\/jquery.countup.min.js\"><\/script><script type=\"text\/javascript\" charset=\"utf-8\">\n $((function() {\n var e, t, o;\n 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