{"body":"\n\n

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[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 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src=\"\/\/v4-upload.goalsites.com\/728\/image_1637133592_Manual-valve.jpg?imageView2\/1\/w\/80\/h\/80\/format\/webp\" alt=\"V\u00e0lvula Manual\">\n<\/div> <span>V\u00e0lvula Manual<\/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\/control-valve.html\">\n <div class=\"sub_item_img\"> <img 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> 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(s = \"bahasa Indonesia\", e && (e.removeAttribute(\"class\"), e.setAttribute(\"class\", \"flag-icon flag-icon-id\"))) : \/^(pl\\.)\/.test(t) && (s = \"Polskie\", e && (e.removeAttribute(\"class\"), e.setAttribute(\"class\", \"flag-icon flag-icon-pl\"))), a && (a.innerHTML = s)\n }()\n <\/script><style>\n [dir=rtl] .blog-details-text-area .blog-date ul li::before {\n left: -10px;\n right: 0\n }\n\n [dir=rtl] .blog-details-text-area .blog-date ul li:last-child::before {\n display: none\n }\n <\/style>\n<div class=\"blog-details pt-100 pb-100\">\n <div class=\"w1200\">\n <div class=\"row\">\n <div class=\"col-lg-8 col-md-12 col-sm-12 col-12\">\n <div class=\"blog-details-text-area\"> <img src=\"\/\/v4-upload.goalsites.com\/728\/image_1637152663_COVNA-Cast-Iron-HK60D-M-Electric-Actuated-Lug-Type_-(4).jpg\" alt=\"On s'aplica la v\u00e0lvula de papallona\"><div class=\"blog-date\">\n <ul>\n<li> <i class=\"fas fa-user\"><\/i> <span style=\"margin-right:0\"><\/span> <\/li>\n <li> <i class=\"far fa-calendar-check\"><\/i> <span style=\"margin-right:0\">23 de Desembre de 2021<\/span> <\/li>\n <\/ul>\n<\/div>\n <h3>On s'aplica la v\u00e0lvula de papallona<\/h3>\n <div class=\"blog-details-text img-res\">Les v\u00e0lvules de papallona s\u00f3n adequades per a canonades que transporten diversos mitjans de fluids corrosius i no corrosius en sistemes d'enginyeria com ara generadors, gas carb\u00f3, gas natural, gas liquat del petroli, gas ciutat, aire fred i calent, fosa qu\u00edmica i generaci\u00f3 d'energia i protecci\u00f3 del medi ambient, i s'utilitzen per a la regulaci\u00f3 i la intercepci\u00f3. El flux del medi.<br>Les v\u00e0lvules de papallona s\u00f3n adequades per a la regulaci\u00f3 del flux. Com que la p\u00e8rdua de pressi\u00f3 de la v\u00e0lvula de papallona a la canonada \u00e9s relativament gran, \u00e9s aproximadament tres vegades la de la v\u00e0lvula de la porta. Per tant, a l'hora de seleccionar la v\u00e0lvula de papallona, s'ha de tenir en compte completament la influ\u00e8ncia de la p\u00e8rdua de pressi\u00f3 del sistema de canonades i tamb\u00e9 s'ha de tenir en compte la for\u00e7a de la placa de papallona per suportar la pressi\u00f3 del medi de canonada quan est\u00e0 tancada. sexe. A m\u00e9s, cal tenir en compte la limitaci\u00f3 de la temperatura de treball del material del seient de la v\u00e0lvula el\u00e0stica a alta temperatura.<br>La longitud estructural i l'al\u00e7ada general de la v\u00e0lvula de papallona s\u00f3n petites, la velocitat d'obertura i tancament \u00e9s r\u00e0pida i t\u00e9 bones caracter\u00edstiques de control de fluids. El principi estructural de la v\u00e0lvula de papallona \u00e9s el m\u00e9s adequat per fabricar v\u00e0lvules de gran di\u00e0metre. Quan es requereix la v\u00e0lvula de papallona per controlar el flux, el m\u00e9s important \u00e9s seleccionar correctament la mida i el tipus de v\u00e0lvula de papallona perqu\u00e8 pugui funcionar correctament i efica\u00e7ment.<br>Generalment, en l'acceleraci\u00f3, el control regulador i el medi de fang, es requereix una longitud d'estructura curta i una velocitat d'obertura i tancament r\u00e0pida (1\/4r). Per al tall a baixa pressi\u00f3 (petita difer\u00e8ncia de pressi\u00f3), es recomana la v\u00e0lvula de papallona.<br>En l'ajust de dues posicions, canal d'estrenyiment, baix soroll, cavitaci\u00f3 i vaporitzaci\u00f3, una petita quantitat de fuites a l'atmosfera i mitjans abrasius, es poden utilitzar v\u00e0lvules de papallona.<br>Quan s'utilitzen v\u00e0lvules de papallona en condicions especials com ara ajust d'acceleraci\u00f3, requisits estrictes de segellat, desgast sever, baixa temperatura (criog\u00e8nica) i altres condicions, cal un disseny especial per a triple exc\u00e8ntric o doble exc\u00e8ntric amb un segell met\u00e0l\u00b7lic especialment dissenyat amb dispositiu d'ajust. V\u00e0lvula de papallona.<br>La v\u00e0lvula de papallona central \u00e9s adequada per a aigua dol\u00e7a, aig\u00fces residuals, aigua de mar, aigua salada, vapor, gas natural, aliments, medicaments, petroli i diversos productes que requereixen un segellat complet, fuites de prova de gas zero, requisits de vida \u00fatil elevats i temperatura de treball de -10 ~ 150 \u00b0 C \u00c0cid-base i altres canonades.<br>La v\u00e0lvula exc\u00e8ntrica de papallona segellada suaument \u00e9s adequada per a l'obertura i el tancament bidireccionals i l'ajust de les canonades de ventilaci\u00f3 i eliminaci\u00f3 de pols. S'utilitza \u00e0mpliament en gasoductes i vies fluvials en metal\u00b7l\u00fargia, ind\u00fastria lleugera, energia el\u00e8ctrica i sistemes petroqu\u00edmics.<br>La doble v\u00e0lvula de papallona exc\u00e8ntrica de fil met\u00e0l\u00b7lic \u00e9s adequada per a canonades urbanes de calefacci\u00f3, vapor, aigua i gas, petroli, \u00e0cid i \u00e0lcali, com a dispositiu de regulaci\u00f3 i tancament.<br>A m\u00e9s d'utilitzar-se com a v\u00e0lvula de control del programa de control del programa de separaci\u00f3 de gasos d'adsorci\u00f3 d'oscil\u00b7laci\u00f3 de pressi\u00f3 a gran escala (PSA), la v\u00e0lvula de papallona triple exc\u00e8ntrica de segell de metall a metall tamb\u00e9 es pot utilitzar \u00e0mpliament en petroli, petroqu\u00edmica, qu\u00edmica, metal\u00b7l\u00fargica, el\u00e8ctrica i altres camps. \u00c9s una v\u00e0lvula de porta, v\u00e0lvula d'aturada, etc. Bon producte alternatiu.<\/div>\n <\/div>\n <\/div>\n <div class=\"col-lg-4 col-md-12 col-sm-12 col-12\">\n <div class=\"details-page-sidebar pl-12 pt-30\">\n <div class=\"sidebar\">\n <div class=\"search-box\">\n <form action=\"\/search\/articles\" method=\"GET\">\n <div class=\"input-group\"> <input type=\"search\" class=\"form-control\" name=\"keyword\" placeholder=\"BUSCAR\" required><button class=\"btn\" type=\"submit\"> <i class=\"fa fa-search\"><\/i> <\/button> <\/div>\n <\/form>\n <\/div>\n <\/div>\n <div class=\"sidebar-section popular-post\">\n <h3>missatge recent<i><\/i>\n<\/h3>\n <div class=\"popular-post-card\">\n <div class=\"popular-post-img\"> <a href=\"https:\/\/ca.covna-china.com\/article\/how-to-choose-electric-actuators-and--pneumatic-actuators.html\" title=\"Com triar actuadors el\u00e8ctrics i actuadors pneum\u00e0tics\"> <img src=\"\/\/v4-upload.goalsites.com\/728\/image_1647081732_24.png?imageView2\/1\/w\/85\/h\/84\/format\/webp\" alt=\"Com triar actuadors el\u00e8ctrics i actuadors pneum\u00e0tics\" width=\"85px\" height=\"84px\"><\/a> <\/div>\n <div 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petroli i gas<\/a> <\/h4>\n <h6>15 de novembre de 2021<\/h6>\n <\/div>\n <\/div>\n <div class=\"popular-post-card\">\n <div class=\"popular-post-img\"> <a href=\"https:\/\/ca.covna-china.com\/article\/the-difference-and-selection-of-cryogenic-valve-and-ordinary-temperature.html\" title=\"La difer\u00e8ncia i selecci\u00f3 de la v\u00e0lvula criog\u00e8nica i la temperatura ordin\u00e0ria\"> <img src=\"\/\/v4-upload.goalsites.com\/728\/image_1636955644_3.jpg?imageView2\/1\/w\/85\/h\/84\/format\/webp\" alt=\"La difer\u00e8ncia i selecci\u00f3 de la v\u00e0lvula criog\u00e8nica i la temperatura ordin\u00e0ria\" width=\"85px\" height=\"84px\"><\/a> <\/div>\n <div class=\"popular-post-card-text\">\n <h4> <a href=\"https:\/\/ca.covna-china.com\/article\/the-difference-and-selection-of-cryogenic-valve-and-ordinary-temperature.html\" title=\"La difer\u00e8ncia i selecci\u00f3 de la v\u00e0lvula criog\u00e8nica i la temperatura ordin\u00e0ria\">La difer\u00e8ncia i selecci\u00f3 de la 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{\n ._tags-tab_13kno_350.vetical .tab-nav .tab-item {\n width: 220px\n }\n }\n\n ._tags-tab_13kno_350 .tab-nav .tab-link {\n display: inline-block;\n font-size: 14px;\n font-weight: 500;\n text-transform: capitalize;\n color: #666\n }\n\n ._tags-tab_13kno_350.vetical .tab-nav .tab-item {\n padding: 5px 0;\n margin-bottom: 5px\n }\n\n ._tags-tab_13kno_350 .tab-nav .tab-link ._icon_13kno_264 {\n margin-right: .5rem\n }\n\n ._tags-tab_13kno_350 .tab-nav .tab-item {\n margin-right: 1.5rem;\n margin-bottom: .5rem\n }\n\n ._tags-tab_13kno_350 .tab-nav .tab-item.active {\n border-color: #666\n }\n\n ._tags-tab_13kno_350 .tab-nav .tab-item.active .tab-link {\n color: #666\n }\n\n ._tags-tab_13kno_350.vetical .tab-content {\n min-height: 200px\n }\n\n ._tags-tab_13kno_350 .tab-content .tab-pane {\n display: none;\n height: 150px\n }\n\n ._tags-tab_13kno_350 .tab-content .tab-pane.show {\n display: block\n }\n\n [dir=rtl] ._tags-tab_13kno_350 .tab-nav .tab-link ._icon_13kno_264 {\n margin-right: 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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