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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 .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 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target=\"_blank\"> <i class=\"flag-icon flag-icon-pl\"><\/i> Polskie <\/a> <\/li>\n <\/ul>\n<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <div class=\"header-area inside_pages_site\">\n <div class=\"navbar-area\">\n <div class=\"main-responsive-nav\">\n <div class=\"w1200\">\n <div class=\"mobile-nav\"> <a href=\"https:\/\/ca.covna-china.com\/\" class=\"logo\"> <img src=\"\/\/v4-upload.goalsites.com\/728\/image_1629961935_logo.jpg\" alt=\"logo\" width=\"140\" height=\"24\"><\/a>\n <ul class=\"menu-sidebar menu-small-device\">\n<li> <i class=\"fa fa-search\"><\/i>\n <div class=\"m-search-box search_g_box\">\n <form action=\"\/search\/products\" method=\"GET\"> <input type=\"text\" name=\"keyword\" placeholder=\"Buscar...\" required><button type=\"submit\"><i class=\"fa fa-search\"><\/i><\/button> <\/form>\n <\/div>\n <\/li>\n <\/ul>\n<div class=\"switch-mobile-nav-btn d-lg-block\">\n <div class=\"m-switch\"> <i class=\"fa fa-bars\"><\/i> <\/div>\n 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src=\"\/\/v4-upload.goalsites.com\/728\/image_1644645247_%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20220212134243.png?imageView2\/1\/w\/80\/h\/80\/format\/webp\" alt=\"V\u00e0lvula de control\">\n<\/div> <span>V\u00e0lvula de control<\/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:\/\/ca.covna-china.com\/products\/actuator.html\">\n <div class=\"sub_item_img\"> <img src=\"\/\/v4-upload.goalsites.com\/728\/image_1644647212_%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20220212142632.jpg?imageView2\/1\/w\/80\/h\/80\/format\/webp\" alt=\"Actuador\">\n<\/div> <span>Actuador<\/span>\n <\/a> <\/div>\n <\/div>\n <\/div>\n <\/li>\n <li class=\"nav-item\"> <a href=\"https:\/\/ca.covna-china.com\/page\/about-us.html\" class=\"nav-link dropdown-toggle\">Sobre Nosaltres<i class=\"fa fa-caret-down\"><\/i><\/a>\n <ul class=\"dropdown-menu\">\n<li class=\"nav-item\"> <a href=\"https:\/\/ca.covna-china.com\/page\/history.html\" class=\"nav-link 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Les seves parts d'obertura i tancament s\u00f3n plaques de portes. La direcci\u00f3 de moviment de la placa de la porta \u00e9s perpendicular a la direcci\u00f3 del fluid. El mitj\u00e0 es talla mitjan\u00e7ant una porta de vora de ganivet que pot tallar materials de fibra. La placa de la porta t\u00e9 dues superf\u00edcies de segellat. Les dues superf\u00edcies de segellat de la v\u00e0lvula de porta de mode m\u00e9s utilitzada formen w<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/features-of-knife-gate-valve.html\">Llegir m\u00e9s >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/ca.covna-china.com\/article\/what-is-electric-control-valve.html\" title=\"Qu\u00e8 \u00e9s la v\u00e0lvula de control el\u00e8ctric?\"> <img class=\"lazy\" alt=\"Qu\u00e8 \u00e9s la v\u00e0lvula de control el\u00e8ctric?\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1629961935_logo.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>24 d'octubre de 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/ca.covna-china.com\/article\/what-is-electric-control-valve.html\" title=\"Qu\u00e8 \u00e9s la v\u00e0lvula de control el\u00e8ctric?\">Qu\u00e8 \u00e9s la v\u00e0lvula de control el\u00e8ctric?<\/a> <\/h4>\n <p>La v\u00e0lvula de control el\u00e8ctric \u00e9s una v\u00e0lvula d'accionament hidr\u00e0ulic amb una v\u00e0lvula solenoide com a v\u00e0lvula guia. Sovint s'utilitza per al control autom\u00e0tic en subministrament i drenatge d'aigua i sistemes industrials. La resposta de control \u00e9s precisa i r\u00e0pida, i el sistema de canonades s'obre i es tanca remotament segons els senyals el\u00e8ctrics per realitzar un funcionament remot. Pot substituir la v\u00e0lvula de porta i la v\u00e0lvula de papallona per operati el\u00e8ctric gran<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/what-is-electric-control-valve.html\">Llegir m\u00e9s >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/ca.covna-china.com\/article\/the-difference-between-air-operated-valve-and-electric-valve.html\" title=\"La difer\u00e8ncia entre v\u00e0lvula accionada per aire i v\u00e0lvula el\u00e8ctrica\"> <img class=\"lazy\" alt=\"La difer\u00e8ncia entre v\u00e0lvula accionada per aire i v\u00e0lvula el\u00e8ctrica\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1629961935_logo.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>24 d'octubre de 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/ca.covna-china.com\/article\/the-difference-between-air-operated-valve-and-electric-valve.html\" title=\"La difer\u00e8ncia entre v\u00e0lvula accionada per aire i v\u00e0lvula el\u00e8ctrica\">La difer\u00e8ncia entre v\u00e0lvula accionada per aire i v\u00e0lvula el\u00e8ctrica<\/a> <\/h4>\n <p>Una v\u00e0lvula pneum\u00e0tica \u00e9s una v\u00e0lvula accionada per aire comprimit. En comprar v\u00e0lvules pneum\u00e0tiques, nom\u00e9s cal especificar les especificacions, els tipus i les pressions de treball per complir els requisits de compra. fluir. La difer\u00e8ncia entre la v\u00e0lvula pneum\u00e0tica i la v\u00e0lvula solenoide \u00e9s la difer\u00e8ncia en la font del senyal. La v\u00e0lvula solenoide utilitza electricitat per controlar el gas pilot per emp\u00e8nyer el nucli de la v\u00e0lvula a canviar de sentit<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/the-difference-between-air-operated-valve-and-electric-valve.html\">Llegir m\u00e9s >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/ca.covna-china.com\/article\/how-to-maintain-the-control-valve.html\" title=\"Com mantenir la v\u00e0lvula de control?\"> <img class=\"lazy\" alt=\"Com mantenir la v\u00e0lvula de control?\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1637133592_Manual-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>24 d'octubre de 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/ca.covna-china.com\/article\/how-to-maintain-the-control-valve.html\" title=\"Com mantenir la v\u00e0lvula de control?\">Com mantenir la v\u00e0lvula de control?<\/a> <\/h4>\n <p>La v\u00e0lvula de control t\u00e9 les caracter\u00edstiques d'estructura senzilla i acci\u00f3 fiable, per\u00f2 com que est\u00e0 en contacte directe amb el medi de proc\u00e9s, el seu rendiment afecta directament la qualitat del sistema i la contaminaci\u00f3 ambiental, per la qual cosa la v\u00e0lvula de control s'ha de mantenir i reparar regularment, especialment per a condicions de funcionament dures i importants. De vegades, s'ha de prestar m\u00e9s atenci\u00f3 als treballs de manteniment. Clau<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/how-to-maintain-the-control-valve.html\">Llegir m\u00e9s >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/ca.covna-china.com\/article\/what-are-the-advantages-of-gate-valve.html\" title=\"Quins avantatges t\u00e9 la v\u00e0lvula de porta?\"> <img class=\"lazy\" alt=\"Quins avantatges t\u00e9 la v\u00e0lvula de porta?\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1630029199_t-video.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>Setembre 07, 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/ca.covna-china.com\/article\/what-are-the-advantages-of-gate-valve.html\" title=\"Quins avantatges t\u00e9 la v\u00e0lvula de porta?\">Quins avantatges t\u00e9 la v\u00e0lvula de porta?<\/a> <\/h4>\n <p>1. Petita resist\u00e8ncia al flux. El canal mitj\u00e0 dins del cos de la v\u00e0lvula \u00e9s recte, el mitj\u00e0 flueix en l\u00ednia recta i la resist\u00e8ncia al flux \u00e9s petita. 2. Estalvia m\u00e9s m\u00e0 d'obra a l'hora d'obrir i tancar. En comparaci\u00f3 amb la v\u00e0lvula del globus, perqu\u00e8 tant si est\u00e0 oberta com tancada, la direcci\u00f3 de moviment de la porta \u00e9s perpendicular a la direcci\u00f3 del flux del medi. 3. L'al\u00e7ada \u00e9s gran i el ti d'obertura i tancament<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/what-are-the-advantages-of-gate-valve.html\">Llegir m\u00e9s >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/ca.covna-china.com\/article\/do-you-know-the-difference-between-electric-valve-and-solenoid-valve.html\" title=\"Coneixes la difer\u00e8ncia entre v\u00e0lvula el\u00e8ctrica i v\u00e0lvula solenoide?\"> <img class=\"lazy\" alt=\"Coneixes la difer\u00e8ncia entre v\u00e0lvula el\u00e8ctrica i v\u00e0lvula solenoide?\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1630029164_about_icon2.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>Setembre 07, 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/ca.covna-china.com\/article\/do-you-know-the-difference-between-electric-valve-and-solenoid-valve.html\" title=\"Coneixes la difer\u00e8ncia entre v\u00e0lvula el\u00e8ctrica i v\u00e0lvula solenoide?\">Coneixes la difer\u00e8ncia entre v\u00e0lvula el\u00e8ctrica i v\u00e0lvula solenoide?<\/a> <\/h4>\n <p>1. La v\u00e0lvula solenoide t\u00e9 un excel\u00b7lent rendiment anti-fuites, s'obre i es tanca r\u00e0pidament i t\u00e9 una pot\u00e8ncia baixa. \u00c9s adequat per al seu \u00fas com a tall en algunes canonades qu\u00edmiques com la corrosi\u00f3 i la toxicitat; les v\u00e0lvules el\u00e8ctriques s'utilitzen principalment per a la regulaci\u00f3 del flux de canonades i normalment s'instal\u00b7len en el subministrament d'aire i la refrigeraci\u00f3. La sortida d'aire de la canonada tamb\u00e9 es pot utilitzar en canonades l\u00edquides i s'utilitza \u00e0mpliament en canya<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/do-you-know-the-difference-between-electric-valve-and-solenoid-valve.html\">Llegir m\u00e9s >><\/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:\/\/ca.covna-china.com\/articles\/all\/2.html\">2<\/a><\/li>\n <li><a href=\"https:\/\/ca.covna-china.com\/articles\/all\/3.html\">3<\/a><\/li>\n <li><a href=\"https:\/\/ca.covna-china.com\/articles\/all\/4.html\">4<\/a><\/li>\n <li><a href=\"https:\/\/ca.covna-china.com\/articles\/all\/5.html\">5<\/a><\/li>\n <li><a href=\"https:\/\/ca.covna-china.com\/articles\/all\/2.html\">\u203a<\/a><\/li>\n <li><a 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0;\n margin-left: .5rem\n }\n\n [dir=rtl] ._tags-tab_13kno_350 .tab-nav .tab-link {\n margin-right: 0;\n margin-left: .5rem\n }\n <\/style>\n<section id=\"_section-links_1k55i_757\"><div class=\"_container_1k55i_128\">\n <div class=\"_tags-box_13kno_350 _center_1k55i_505\">\n <h4 class=\"_section-title_1k55i_500\">Enlla\u00e7os relacionats<\/h4> <a href=\"https:\/\/ca.covna-china.com\/dlp\/electric-valve.html\">v\u00e0lvula el\u00e8ctrica<\/a> <a href=\"https:\/\/ca.covna-china.com\/dlp\/solenoid-valve.html\">v\u00e0lvula solenoide<\/a> <a href=\"https:\/\/ca.covna-china.com\/dlp\/pneumatic-valve.html\">v\u00e0lvula pneum\u00e0tica<\/a> <a href=\"https:\/\/ca.covna-china.com\/dlp\/electric-gate-valve.html\">v\u00e0lvula de porta el\u00e8ctrica<\/a> <a href=\"https:\/\/ca.covna-china.com\/dlp\/electric-butterfly-valve.html\">v\u00e0lvula de papallona el\u00e8ctrica<\/a> <a href=\"https:\/\/ca.covna-china.com\/dlp\/motorized-valve.html\">v\u00e0lvula motoritzada<\/a> <a 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height: auto !important;\n max-width: 100% !important\n }\n\n .sub_item_img {\n width: 80px;\n height: 80px;\n overflow: hidden;\n display: inline-block;\n vertical-align: middle\n }\n\n .breadcrumb_nav_img {\n height: 300px\n }\n\n .breadcrumb_nav_box .fa.fa-home {\n color: #666\n }\n\n .breadcrumb_nav_box a {\n color: var(--main-theme-color);\n text-decoration: none;\n font-weight: 600\n }\n\n .breadcrumb_nav_box .breadcrumb_nav_position {\n text-transform: none\n }\n\n .breadcrumb_nav_box span {\n text-transform: capitalize\n }\n\n .breadcrumb_nav_wrap {\n padding: 13px 0;\n background-color: #ececec\n }\n\n .breadcrumb_nav_list {\n margin: 0;\n padding: 0;\n display: flex;\n flex-wrap: wrap\n }\n\n .breadcrumb_nav_list li {\n margin: 0;\n padding: 0;\n list-style: none;\n margin-right: 10px\n }\n\n .breadcrumb_nav_list li a {\n text-transform: capitalize\n }\n\n .breadcrumb_nav_list li a:hover {\n color: var(--main-theme-color)\n }\n\n .breadcrumb_nav_list li i {\n margin-right: 4px\n }\n\n .breadcrumb_h1_box {\n background-color: #e5e5e5;\n text-align: center;\n height: 100%;\n width: 100%\n }\n\n .breadcrumb_h1_box h1 {\n font-size: 36px;\n font-family: Arial;\n font-weight: 700;\n color: #fff;\n width: 100%\n }\n\n .language-select .dropdown-menu {\n min-width: 170px;\n height: 600px;\n overflow: auto\n }\n\n .language-select i {\n vertical-align: middle\n }\n\n .has_box .sub_box .sub_item span {\n display: inline-block;\n max-width: 60%;\n vertical-align: middle\n }\n\n [lang=ca] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=de] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=el] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=es] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=et] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=fr] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=it] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=ms] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=pl] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=pt] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=ro] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=sk] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=sv] .main-nav nav .navbar-nav .nav-item .dropdown-menu {\n max-width: 290px\n }\n\n [lang=ca] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=de] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=el] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=es] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=et] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=fr] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=it] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=ms] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=pl] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=pt] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=ro] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=sk] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=sv] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box {\n max-width: 100%\n }\n\n [lang=bg] .main-nav nav .navbar-nav .nav-item .dropdown-menu,\n [lang=ru] .main-nav nav .navbar-nav .nav-item .dropdown-menu {\n max-width: 330px\n }\n\n [lang=bg] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box,\n [lang=ru] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box {\n max-width: 100%\n }\n\n [lang=ru] .sub_item_img {\n width: 78px;\n height: 78px\n }\n\n [lang=ru] .main-nav nav .navbar-nav .nav-item.has_box .sub_box .sub_item a {\n font-size: 13px\n }\n\n [lang=cs] .sub_item_img {\n width: 76px;\n height: 76px\n }\n\n [lang=bg] .main-nav nav .navbar-nav .nav-item.has_box .sub_box .sub_item a,\n [lang=cs] .main-nav nav .navbar-nav .nav-item.has_box .sub_box .sub_item a {\n font-size: 14px\n }\n\n [lang=lv] .main-nav nav .navbar-nav .nav-item .dropdown-menu {\n max-width: 260px\n }\n\n [lang=lv] .main-nav nav .navbar-nav .nav-item .dropdown-menu.sub_box {\n max-width: 100%\n }\n\n [lang=lt] .main-nav nav .navbar-nav>.nav-item,\n [lang=vi] .main-nav nav .navbar-nav>.nav-item {\n margin-left: 12px;\n margin-right: 12px\n }\n\n [dir=rtl] .topbar ul {\n text-align: right\n }\n\n [dir=rtl] .top-contact-area ul li i {\n margin-left: 4px;\n margin-right: 0\n }\n\n [dir=rtl] .language-select i {\n margin-left: 4px;\n margin-right: 0\n }\n\n [dir=rtl] .main-nav nav .navbar-nav {\n margin-left: 0;\n margin-right: auto\n }\n\n [dir=rtl] .searchbox {\n padding: 18px 16px 18px 0\n }\n\n [lang=ko] .main-nav nav .navbar-nav .nav-item.has_box .sub_box .sub_item a {\n font-size: 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 .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: \"AW-10818223058\/VD_JCK_UqIcDENL3w6Yo\",\n event_callback: function() {\n void 0 !== n && (window.location = n)\n }\n }), !1\n }\n <\/script>\n<\/head>\n<body>\n <div class=\"topbar inside_pages_site\">\n <div class=\"w1200\">\n <div class=\"topbar-content\">\n <div class=\"row align-items-center\">\n <div class=\"col-xl-9 col-md-6 col-sm-12 col-12\">\n <div class=\"top-contact-area\">\n <ul>\n<li> <i class=\"fas fa-phone-alt\"><\/i> <span>Tel\u00e8fon:<\/span> <a href=\"tel:8613556641138\">+86-1355-6641138<\/a> <\/li>\n <li> <i class=\"fa fa-envelope\"><\/i> <span>Correu electr\u00f2nic:<\/span> <a href=\"mailto:inquiry@covna-china.com\">inquiry@covna-china.com<\/a> <\/li>\n <\/ul>\n<\/div>\n <\/div>\n <div class=\"col-xl-3 col-md-6 col-sm-12 col-12\">\n <div class=\"topbar-right-area\">\n <div class=\"language-select\">\n <div class=\"dropdown\">\n <div class=\"header_lang_btn\"> <i id=\"lang_icon\" class=\"fas fa-globe\"><\/i> <span id=\"lang_text\" style=\"position:relative;top:2px\">Llengua<\/span> <i class=\"fa fa-caret-down xiala\"><\/i> <\/div>\n <ul class=\"dropdown-menu\" aria-labelledby=\"dLabel\">\n<li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/es.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-es\"><\/i> Espa\u00f1ol <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/fr.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-fr\"><\/i> Fran\u00e7ais <\/a> <\/li>\n 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Catal\u00e0 <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/cs.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-cz\"><\/i> \u010de\u0161tina <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/hr.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-hr\"><\/i> Hrvatski <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/lv.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-lv\"><\/i> Latvij\u0101 <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/lt.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-lt\"><\/i> Lietuvos <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/ar.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-sa\"><\/i> \u0627\u0644\u0644\u063a\u0629 \u0627\u0644\u0639\u0631\u0628\u064a\u0629 <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/ja.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-jp\"><\/i> \u65e5\u672c\u8a9e <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/ko.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-kr\"><\/i> \ud55c\uad6d\uc5b4 <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/it.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-it\"><\/i> Italiano <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/ms.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-my\"><\/i> Melayu <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/th.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-th\"><\/i> \u0e20\u0e32\u0e29\u0e32\u0e44\u0e17\u0e22 <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/ro.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-ro\"><\/i> Rom\u00e2n\u0103 <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/mt.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-mt\"><\/i> Malti <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/no.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-no\"><\/i> Norsk <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/sv.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-se\"><\/i> Svenska <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/sk.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-sk\"><\/i> slovensk\u00fd <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/sl.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-si\"><\/i> Sloven\u0161\u010dina <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/tr.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-tr\"><\/i> T\u00fcrk <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/hi.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-in\"><\/i> \u0939\u093f\u0902\u0926\u0940 <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/vi.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-vn\"><\/i> Ti\u1ebfng Vi\u1ec7t <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/et.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-ee\"><\/i> Eesti <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/sw.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-tz\"><\/i> Kiswahili <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/ur.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-pk\"><\/i> \u0627\u0631\u062f\u0648 <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/uk.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-ua\"><\/i> \u0423\u043a\u0440\u0430\u0457\u043d\u0441\u044c\u043a\u0438\u0439 <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/iw.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-il\"><\/i> \u05e2\u05b4\u05d1\u05e8\u05b4\u05d9\u05ea <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/el.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-gr\"><\/i> \u03b5\u03bb\u03bb\u03b7\u03bd\u03b9\u03ba\u03ac <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/hu.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-hu\"><\/i> Magyar <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/bg.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-bg\"><\/i> \u0431\u044a\u043b\u0433\u0430\u0440\u0441\u043a\u0438 <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/af.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-za\"><\/i> Afrikaans <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/bs.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-ba\"><\/i> Bosanski <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/fa.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-ir\"><\/i> \u0641\u0627\u0631\u0633\u06cc <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/da.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-dk\"><\/i> Danske <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/fi.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-fi\"><\/i> Suomi <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/id.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-id\"><\/i> bahasa Indonesia <\/a> <\/li>\n <li> <a class=\"trans-dot3s notranslate\" href=\"https:\/\/pl.covna-china.com\" target=\"_blank\"> <i class=\"flag-icon flag-icon-pl\"><\/i> Polskie <\/a> <\/li>\n <\/ul>\n<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <div class=\"header-area inside_pages_site\">\n <div class=\"navbar-area\">\n <div class=\"main-responsive-nav\">\n <div class=\"w1200\">\n <div class=\"mobile-nav\"> <a href=\"https:\/\/ca.covna-china.com\/\" class=\"logo\"> <img src=\"\/\/v4-upload.goalsites.com\/728\/image_1629961935_logo.jpg\" alt=\"logo\" width=\"140\" height=\"24\"><\/a>\n <ul class=\"menu-sidebar menu-small-device\">\n<li> <i class=\"fa fa-search\"><\/i>\n <div class=\"m-search-box search_g_box\">\n <form action=\"\/search\/products\" method=\"GET\"> <input type=\"text\" name=\"keyword\" placeholder=\"Buscar...\" required><button type=\"submit\"><i class=\"fa fa-search\"><\/i><\/button> <\/form>\n <\/div>\n <\/li>\n <\/ul>\n<div class=\"switch-mobile-nav-btn d-lg-block\">\n <div class=\"m-switch\"> <i class=\"fa fa-bars\"><\/i> <\/div>\n 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Les seves parts d'obertura i tancament s\u00f3n plaques de portes. La direcci\u00f3 de moviment de la placa de la porta \u00e9s perpendicular a la direcci\u00f3 del fluid. El mitj\u00e0 es talla mitjan\u00e7ant una porta de vora de ganivet que pot tallar materials de fibra. La placa de la porta t\u00e9 dues superf\u00edcies de segellat. Les dues superf\u00edcies de segellat de la v\u00e0lvula de porta de mode m\u00e9s utilitzada formen w<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/features-of-knife-gate-valve.html\">Llegir m\u00e9s >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/ca.covna-china.com\/article\/what-is-electric-control-valve.html\" title=\"Qu\u00e8 \u00e9s la v\u00e0lvula de control el\u00e8ctric?\"> <img class=\"lazy\" alt=\"Qu\u00e8 \u00e9s la v\u00e0lvula de control el\u00e8ctric?\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1629961935_logo.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>24 d'octubre de 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/ca.covna-china.com\/article\/what-is-electric-control-valve.html\" title=\"Qu\u00e8 \u00e9s la v\u00e0lvula de control el\u00e8ctric?\">Qu\u00e8 \u00e9s la v\u00e0lvula de control el\u00e8ctric?<\/a> <\/h4>\n <p>La v\u00e0lvula de control el\u00e8ctric \u00e9s una v\u00e0lvula d'accionament hidr\u00e0ulic amb una v\u00e0lvula solenoide com a v\u00e0lvula guia. Sovint s'utilitza per al control autom\u00e0tic en subministrament i drenatge d'aigua i sistemes industrials. La resposta de control \u00e9s precisa i r\u00e0pida, i el sistema de canonades s'obre i es tanca remotament segons els senyals el\u00e8ctrics per realitzar un funcionament remot. Pot substituir la v\u00e0lvula de porta i la v\u00e0lvula de papallona per operati el\u00e8ctric gran<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/what-is-electric-control-valve.html\">Llegir m\u00e9s >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/ca.covna-china.com\/article\/the-difference-between-air-operated-valve-and-electric-valve.html\" title=\"La difer\u00e8ncia entre v\u00e0lvula accionada per aire i v\u00e0lvula el\u00e8ctrica\"> <img class=\"lazy\" alt=\"La difer\u00e8ncia entre v\u00e0lvula accionada per aire i v\u00e0lvula el\u00e8ctrica\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1629961935_logo.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>24 d'octubre de 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/ca.covna-china.com\/article\/the-difference-between-air-operated-valve-and-electric-valve.html\" title=\"La difer\u00e8ncia entre v\u00e0lvula accionada per aire i v\u00e0lvula el\u00e8ctrica\">La difer\u00e8ncia entre v\u00e0lvula accionada per aire i v\u00e0lvula el\u00e8ctrica<\/a> <\/h4>\n <p>Una v\u00e0lvula pneum\u00e0tica \u00e9s una v\u00e0lvula accionada per aire comprimit. En comprar v\u00e0lvules pneum\u00e0tiques, nom\u00e9s cal especificar les especificacions, els tipus i les pressions de treball per complir els requisits de compra. fluir. La difer\u00e8ncia entre la v\u00e0lvula pneum\u00e0tica i la v\u00e0lvula solenoide \u00e9s la difer\u00e8ncia en la font del senyal. La v\u00e0lvula solenoide utilitza electricitat per controlar el gas pilot per emp\u00e8nyer el nucli de la v\u00e0lvula a canviar de sentit<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/the-difference-between-air-operated-valve-and-electric-valve.html\">Llegir m\u00e9s >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/ca.covna-china.com\/article\/how-to-maintain-the-control-valve.html\" title=\"Com mantenir la v\u00e0lvula de control?\"> <img class=\"lazy\" alt=\"Com mantenir la v\u00e0lvula de control?\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1637133592_Manual-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>24 d'octubre de 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/ca.covna-china.com\/article\/how-to-maintain-the-control-valve.html\" title=\"Com mantenir la v\u00e0lvula de control?\">Com mantenir la v\u00e0lvula de control?<\/a> <\/h4>\n <p>La v\u00e0lvula de control t\u00e9 les caracter\u00edstiques d'estructura senzilla i acci\u00f3 fiable, per\u00f2 com que est\u00e0 en contacte directe amb el medi de proc\u00e9s, el seu rendiment afecta directament la qualitat del sistema i la contaminaci\u00f3 ambiental, per la qual cosa la v\u00e0lvula de control s'ha de mantenir i reparar regularment, especialment per a condicions de funcionament dures i importants. De vegades, s'ha de prestar m\u00e9s atenci\u00f3 als treballs de manteniment. Clau<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/how-to-maintain-the-control-valve.html\">Llegir m\u00e9s >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/ca.covna-china.com\/article\/what-are-the-advantages-of-gate-valve.html\" title=\"Quins avantatges t\u00e9 la v\u00e0lvula de porta?\"> <img class=\"lazy\" alt=\"Quins avantatges t\u00e9 la v\u00e0lvula de porta?\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1630029199_t-video.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>Setembre 07, 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/ca.covna-china.com\/article\/what-are-the-advantages-of-gate-valve.html\" title=\"Quins avantatges t\u00e9 la v\u00e0lvula de porta?\">Quins avantatges t\u00e9 la v\u00e0lvula de porta?<\/a> <\/h4>\n <p>1. Petita resist\u00e8ncia al flux. El canal mitj\u00e0 dins del cos de la v\u00e0lvula \u00e9s recte, el mitj\u00e0 flueix en l\u00ednia recta i la resist\u00e8ncia al flux \u00e9s petita. 2. Estalvia m\u00e9s m\u00e0 d'obra a l'hora d'obrir i tancar. En comparaci\u00f3 amb la v\u00e0lvula del globus, perqu\u00e8 tant si est\u00e0 oberta com tancada, la direcci\u00f3 de moviment de la porta \u00e9s perpendicular a la direcci\u00f3 del flux del medi. 3. L'al\u00e7ada \u00e9s gran i el ti d'obertura i tancament<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/what-are-the-advantages-of-gate-valve.html\">Llegir m\u00e9s >><\/a>\n <\/div>\n <\/div>\n <div class=\"blog-card col-lg-4 col-md-6 col-12 wow fadeInUp\"> <a href=\"https:\/\/ca.covna-china.com\/article\/do-you-know-the-difference-between-electric-valve-and-solenoid-valve.html\" title=\"Coneixes la difer\u00e8ncia entre v\u00e0lvula el\u00e8ctrica i v\u00e0lvula solenoide?\"> <img class=\"lazy\" alt=\"Coneixes la difer\u00e8ncia entre v\u00e0lvula el\u00e8ctrica i v\u00e0lvula solenoide?\" src=\"\/\/v4-assets.goalsites.com\/yexuming\/icon\/loading1.gif\" data-original=\"\/\/v4-upload.goalsites.com\/728\/image_1630029164_about_icon2.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>Setembre 07, 2022<\/span>\n<\/li>\n <\/ul>\n<\/div>\n <h4> <a href=\"https:\/\/ca.covna-china.com\/article\/do-you-know-the-difference-between-electric-valve-and-solenoid-valve.html\" title=\"Coneixes la difer\u00e8ncia entre v\u00e0lvula el\u00e8ctrica i v\u00e0lvula solenoide?\">Coneixes la difer\u00e8ncia entre v\u00e0lvula el\u00e8ctrica i v\u00e0lvula solenoide?<\/a> <\/h4>\n <p>1. La v\u00e0lvula solenoide t\u00e9 un excel\u00b7lent rendiment anti-fuites, s'obre i es tanca r\u00e0pidament i t\u00e9 una pot\u00e8ncia baixa. \u00c9s adequat per al seu \u00fas com a tall en algunes canonades qu\u00edmiques com la corrosi\u00f3 i la toxicitat; les v\u00e0lvules el\u00e8ctriques s'utilitzen principalment per a la regulaci\u00f3 del flux de canonades i normalment s'instal\u00b7len en el subministrament d'aire i la refrigeraci\u00f3. La sortida d'aire de la canonada tamb\u00e9 es pot utilitzar en canonades l\u00edquides i s'utilitza \u00e0mpliament en canya<\/p> <a class=\"read-more-btn\" href=\"https:\/\/ca.covna-china.com\/article\/do-you-know-the-difference-between-electric-valve-and-solenoid-valve.html\">Llegir m\u00e9s >><\/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:\/\/ca.covna-china.com\/articles\/all\/2.html\">2<\/a><\/li>\n <li><a href=\"https:\/\/ca.covna-china.com\/articles\/all\/3.html\">3<\/a><\/li>\n <li><a href=\"https:\/\/ca.covna-china.com\/articles\/all\/4.html\">4<\/a><\/li>\n <li><a href=\"https:\/\/ca.covna-china.com\/articles\/all\/5.html\">5<\/a><\/li>\n <li><a href=\"https:\/\/ca.covna-china.com\/articles\/all\/2.html\">\u203a<\/a><\/li>\n <li><a 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href=\"https:\/\/www.instagram.com\/fluidcontrolvalve\/\" target=\"_blank\"><i class=\"fab fa-instagram\"><\/i><\/a> <\/li>\n <\/ul>\n<\/div>\n <\/div>\n <div class=\"footer-links footer-quick-links wow fadeInUp\">\n <h3 class=\"ft_title\">Enlla\u00e7os r\u00e0pids<\/h3>\n <ul>\n<li> <a href=\"https:\/\/ca.covna-china.com\/\"><i class=\"fas fa-long-arrow-alt-right\"><\/i>Llar<\/a> <\/li>\n <li> <a href=\"https:\/\/ca.covna-china.com\/products\/all.html\"><i class=\"fas fa-long-arrow-alt-right\"><\/i>Productes<\/a> <\/li>\n <li> <a href=\"https:\/\/ca.covna-china.com\/page\/about-us.html\"><i class=\"fas fa-long-arrow-alt-right\"><\/i>Sobre Nosaltres<\/a> <\/li>\n <li> <a href=\"https:\/\/ca.covna-china.com\/projects\/all.html\"><i class=\"fas fa-long-arrow-alt-right\"><\/i>Projectes<\/a> <\/li>\n <li> <a href=\"https:\/\/ca.covna-china.com\/articles\/all.html\"><i class=\"fas fa-long-arrow-alt-right\"><\/i>Bloc<\/a> <\/li>\n <li> <a href=\"https:\/\/ca.covna-china.com\/videos\/lives.html\"><i class=\"fas fa-long-arrow-alt-right\"><\/i>Viure<\/a> <\/li>\n <li> <a href=\"https:\/\/ca.covna-china.com\/encyclopedias\/encyclopedia.html\"><i class=\"fas fa-long-arrow-alt-right\"><\/i>Enciclop\u00e8dia<\/a> <\/li>\n <li> <a href=\"https:\/\/ca.covna-china.com\/page\/contact-us.html\"><i class=\"fas fa-long-arrow-alt-right\"><\/i>Contacta amb nosaltres<\/a> <\/li>\n <\/ul>\n<\/div>\n <div class=\"footer-links footer-contact wow fadeInUp\">\n <h3 class=\"ft_title\">Contacta amb nosaltres<\/h3>\n <ul>\n<li> <i class=\"fa fa-envelope\"><\/i>\n <p>Correu electr\u00f2nic:<\/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>Tel\u00e8fon:<\/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>Ubicaci\u00f3:<\/p>\n <p>Longchang Micro-Chuangyuan, districte de Dongcheng ciutat de Dongguan, Xina, 523000<\/p>\n <\/li>\n <\/ul>\n<\/div>\n <div class=\"footer-links footer-form wow fadeInUp\">\n <h3>Subscriure<\/h3>\n <p>Subscriu-te a la nostra newsletter per rebre les nostres not\u00edcies actualitzades!<\/p>\n <form class=\"form-35ae53c76b5ee1daa4a720360e3a6dfd\" 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=\"*El teu nom\">\n<\/div>\n <div class=\"input-group\"> <input type=\"email\" name=\"email\" class=\"form-control2\" placeholder=\"*El teu correu electr\u00f2nic\" 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=\"*Missatge\"><\/textarea>\n<\/div>\n <div class=\"input-group\"> <button class=\"btn\" type=\"submit\">enviar<\/button> <\/div> <input class=\"custom-832d79346386d659f3edcd67e774aaf1_ipAddress\" name=\"custom[ipAddress]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_countryName\" name=\"custom[countryName]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_regionName\" name=\"custom[regionName]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_cityName\" name=\"custom[cityName]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_countryCode\" name=\"custom[countryCode]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_zipCode\" name=\"custom[zipCode]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_latitude\" name=\"custom[latitude]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_longitude\" name=\"custom[longitude]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_timeZone\" name=\"custom[timeZone]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_ipAddress\" name=\"geoip[ipAddress]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_countryName\" name=\"geoip[countryName]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_countryCode\" name=\"geoip[countryCode]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_regionName\" name=\"geoip[regionName]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_cityName\" name=\"geoip[cityName]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_zipCode\" name=\"geoip[zipCode]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_latitude\" name=\"geoip[latitude]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_longitude\" name=\"geoip[longitude]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_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:\/\/ca.covna-china.com\/page\/contact-us.html\" target=\"_blank\">Pol\u00edtica de privacitat<\/a><br>Drets d'autor 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\">Consulta r\u00e0pida<\/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>Consulta r\u00e0pida<\/h2>\n <form class=\"form-35ae53c76b5ee1daa4a720360e3a6dfd\" 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=\"Introdu\u00efu el vostre nom\">\n<\/div>\n <div class=\"form-group\"> <label>*Correu electr\u00f2nic:<\/label> <input type=\"email\" name=\"email\" class=\"form-control\" placeholder=\"Introdueix el teu email\" required=\"required\" pattern=\"[-\\w\\.]+@[-\\w]+(\\.[-\\w]+)+\">\n<\/div>\n <div class=\"form-group\"> <label>Tel\u00e8fon:<\/label> <input type=\"text\" name=\"contact[Phone]\" class=\"form-control\" placeholder=\"Introdu\u00efu el n\u00famero de tel\u00e8fon\" pattern=\"(\\d{11})|^((\\d{7,8})|(\\d{4}|\\d{3})-(\\d{7,8})|(\\d{4}|\\d{3})-(\\d{7,8})-(\\d{4}|\\d{3}|\\d{2}|\\d{1})|(\\d{7,8})-(\\d{4}|\\d{3}|\\d{2}|\\d{1}))$\">\n<\/div>\n <div class=\"form-group\"> <label>*Missatge:<\/label> <textarea class=\"form-control\" rows=\"3\" name=\"message\" placeholder=\"Introdueix el teu missatge\" required=\"required\"><\/textarea>\n<\/div> <button type=\"submit\" class=\"btn btn-primary\">Enviar consulta<\/button> <input class=\"custom-832d79346386d659f3edcd67e774aaf1_ipAddress\" name=\"custom[ipAddress]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_countryName\" name=\"custom[countryName]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_regionName\" name=\"custom[regionName]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_cityName\" name=\"custom[cityName]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_countryCode\" name=\"custom[countryCode]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_zipCode\" name=\"custom[zipCode]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_latitude\" name=\"custom[latitude]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_longitude\" name=\"custom[longitude]\" type=\"hidden\" value><input class=\"custom-832d79346386d659f3edcd67e774aaf1_timeZone\" name=\"custom[timeZone]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_ipAddress\" name=\"geoip[ipAddress]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_countryName\" name=\"geoip[countryName]\" type=\"hidden\" value><input class=\"geo-048a9bc729417347585bd603346489d1_countryCode\" 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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, a;\n document.querySelectorAll('a[href^=\"mailto:\"]').forEach((function(e, t) {\n e.onclick = function() {\n \"inquiry@covna-china.com\" == event.target.innerText.trim() && (console.log(\"email\"), gtag_report_conversion_1(window.location.href))\n }\n })),\n function() {\n window.location.origin;\n var e = window.location.host;\n if (\"rtl\" == (document.getElementsByTagName(\"html\")[0].getAttribute(\"dir\") || document.documentElement.dir) || \/^(ar\\.)\/.test(e) || \/^(iw\\.)\/.test(e)) {\n var t = document.head || document.getElementsByTagName(\"head\")[0],\n a = [\"https:\/\/www.unpkg.com\/bootstrap-rtl@3.3.4\/dist\/css\/bootstrap-rtl.min.css\", \"https:\/\/www.unpkg.com\/bootstrap-rtl@3.3.4\/dist\/css\/bootstrap-flipped.min.css\", 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