{"id":4730,"date":"2024-07-15T12:27:38","date_gmt":"2024-07-15T12:27:38","guid":{"rendered":"https:\/\/sinovalveco.com\/product\/high-pressure-check-valve\/"},"modified":"2024-08-16T12:45:34","modified_gmt":"2024-08-16T12:45:34","slug":"high-pressure-check-valve","status":"publish","type":"product","link":"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/","title":{"rendered":"V\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o"},"content":{"rendered":"<div class=\"lwptoc lwptoc-autoWidth lwptoc-baseItems lwptoc-light lwptoc-notInherit\" data-smooth-scroll=\"1\" data-smooth-scroll-offset=\"24\" data-lwptoc-initialized=\"1\">\n<div class=\"lwptoc_i\">\n<div class=\"lwptoc_items lwptoc_items-visible\">\n<div class=\"lwptoc_itemWrap\">\n<div class=\"lwptoc_item\"><strong style=\"color: #0000ff; font-size: 18pt;\">O que \u00e9 uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o?<\/strong><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><span style=\"font-size: 14pt;\">Uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o \u00e9 um tipo de v\u00e1lvula feita para suportar alta press\u00e3o acima de 500 PSI e que impede o fluxo reverso do fluido. O fluxo reverso de fluido ocorre quando a bomba \u00e9 desligada, reduzindo a energia da press\u00e3o de avan\u00e7o, o que pode fazer com que o fluido mude a dire\u00e7\u00e3o do fluxo de avan\u00e7o para retorno. Esse fluxo reverso de fluido pode causar danos, como contamina\u00e7\u00e3o do fluido a montante, ou interferir no funcionamento da caldeira e da bomba. As v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o s\u00e3o muito resistentes para suportar os n\u00edveis de alta press\u00e3o. A alta resist\u00eancia garante que a v\u00e1lvula n\u00e3o possa entrar em colapso ou sofrer vazamento de fluido atrav\u00e9s dos elementos conectados. Os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o usam materiais resistentes para fabricar a v\u00e1lvula, como a\u00e7o inoxid\u00e1vel, ferro d\u00factil, a\u00e7o carbono e ferro fundido, entre outros. Al\u00e9m disso, outros materiais podem ser usados para fabricar pe\u00e7as internas, como sedes e an\u00e9is, como pl\u00e1stico e borracha. O uso desses materiais macios (pl\u00e1stico e borracha) torna a v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o adequada para uso em baixas temperaturas e alta press\u00e3o. Isso ocorre porque os materiais macios t\u00eam baixa resist\u00eancia a altas temperaturas. A v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o \u00e9 recomendada para uso em aplica\u00e7\u00f5es de alta temperatura se os componentes internos forem feitos de metais que possam suportar altas temperaturas sem causar uma rea\u00e7\u00e3o qu\u00edmica.\u00a0<\/span><\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-post-1286 aligncenter wp-image-3249 size-full\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image002-1.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o\" width=\"458\" height=\"383\" data-lazy-src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image002-1.jpg\" \/><noscript><img decoding=\"async\" class=\"alignnone size-full wp-post-1286 wp-image-3249 aligncenter\" src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image002-1.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o\" width=\"458\" height=\"383\"><\/noscript><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 14pt;\">Figura: V\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o.<\/span><\/p>\n<p>&nbsp;<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u00cdndice<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar tabela de conte\u00fado\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Alternar<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0a0a0a;color:#0a0a0a\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #0a0a0a;color:#0a0a0a\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Components_of_a_high-pressure_check_valve\" >Componentes de uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Body\" >Corpo\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Bonnet\" >Bon\u00e9\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Disc\" >Disco\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Seat\" >Assento\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Gasket\" >Junta de veda\u00e7\u00e3o\u00a0<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#How_does_a_high-pressure_check_valve_work\" >Como funciona uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o?\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Types_of_high-pressure_check_valves\" >Tipos de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#High-pressure_swing_check_valve\" >V\u00e1lvula de reten\u00e7\u00e3o oscilante de alta press\u00e3o\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#High-pressure_lift_check_valve\" >V\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o de alta press\u00e3o\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#High-pressure_stop_check_valve\" >V\u00e1lvula de reten\u00e7\u00e3o de parada de alta press\u00e3o\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Spring_loaded_high-pressure_check_valve\" >V\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o com mola\u00a0<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Applications_of_high-pressure_check_valve\" >Aplica\u00e7\u00f5es da v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Advantages_of_high-pressure_check_valves\" >Vantagens das v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Disadvantages_of_high-pressure_check_valves\" >Desvantagens das v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Troubleshooting_high-pressure_check_valves\" >Solu\u00e7\u00e3o de problemas em v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Valve_vibrateschatters\" >A v\u00e1lvula vibra\/chateia<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Internal_fluid_leakage\" >Vazamento de fluido interno\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#External_fluid_leakage\" >Vazamento de fluido externo\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#The_fluid_does_not_flow_through_the_high-pressure_check_valve\" >O fluido n\u00e3o passa pela v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/ntgdvalve.com\/pt\/high-pressure-check-valve\/#Summary\" >Resumo\u00a0<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Components_of_a_high-pressure_check_valve\"><\/span><span id=\"Components_of_a_high-pressure_check_valve\"><span style=\"font-size: 18pt; color: #0000ff;\"><strong>Componentes de uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Body\"><\/span><span id=\"Body\"><span style=\"font-size: 14pt;\"><strong><em>Corpo<\/em><\/strong>\u00a0<\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">O corpo \u00e9 a parte principal de uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o e \u00e9 usado para manter os componentes internos. O corpo \u00e9 muito resistente, pois \u00e9 feito de metais fortes, como a\u00e7o inoxid\u00e1vel e a\u00e7o carbono. A alta resist\u00eancia do metal torna o corpo da v\u00e1lvula forte e resistente a danos por impacto, que podem ser causados pela queda de objetos ou pela queda da v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o. O corpo cont\u00e9m as portas de entrada e sa\u00edda da v\u00e1lvula.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Bonnet\"><\/span><span id=\"Bonnet\"><span style=\"font-size: 14pt;\"><strong><em>Bon\u00e9\u00a0<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">Essa \u00e9 outra parte do corpo que \u00e9 colocada na parte superior da v\u00e1lvula. Os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o projetam o castelo e o corpo com o mesmo material. Isso ajuda a aumentar a compatibilidade dos dois quando conectados e garante a mesma resist\u00eancia e uma veda\u00e7\u00e3o firme contra qualquer vazamento. O corpo e o castelo das v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o s\u00e3o conectados por meio de diferentes m\u00e9todos, como parafusos, veda\u00e7\u00e3o por press\u00e3o e m\u00e9todos de soldagem. Esses s\u00e3o os m\u00e9todos que os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o recomendam para v\u00e1lvulas usadas para transmitir fluidos a uma press\u00e3o muito alta.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Disc\"><\/span><span id=\"Disc\"><span style=\"font-size: 14pt;\"><strong><em>Disco\u00a0<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">Esse \u00e9 o componente de uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o respons\u00e1vel por abrir o fluxo de fluido para frente e fechar qualquer fluido que tente inverter a dire\u00e7\u00e3o. O disco \u00e9 feito de diferentes materiais resistentes, dependendo da \u00e1rea de aplica\u00e7\u00e3o.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Seat\"><\/span><span id=\"Seat\"><span style=\"font-size: 14pt;\"><strong><em>Assento\u00a0<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">Essa \u00e9 uma parte interna de uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o que \u00e9 usada para fornecer a superf\u00edcie de assentamento do disco quando a v\u00e1lvula est\u00e1 fechada. A sede tamb\u00e9m evita qualquer vazamento de fluido entre o corpo e o disco da v\u00e1lvula. Os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o usam v\u00e1rios materiais para fabricar a sede. O material da sede determina onde a v\u00e1lvula \u00e9 mais adequada para uso.\u00a0<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Gasket\"><\/span><span id=\"Gasket\"><span style=\"font-size: 14pt;\"><strong><em>Junta de veda\u00e7\u00e3o\u00a0<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">Essa pe\u00e7a \u00e9 colocada entre as faces de contato da carroceria e do tubo e da carroceria e do cap\u00f4. Ela ajuda a evitar qualquer vazamento de fluido, garantindo uma veda\u00e7\u00e3o firme.\u00a0<\/span><\/p>\n<p><img decoding=\"async\" class=\"wp-post-1286 aligncenter wp-image-3250 size-full\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image004-2.jpg\" alt=\"Funcionamento de uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o\" width=\"389\" height=\"234\" data-lazy-src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image004-2.jpg\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-post-1286 wp-image-3250 aligncenter\" src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image004-2.jpg\" alt=\"Funcionamento de uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o\" width=\"389\" height=\"234\"><\/noscript><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 14pt;\">Figura: Componentes de uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_does_a_high-pressure_check_valve_work\"><\/span><span id=\"How_does_a_high-pressure_check_valve_work\"><span style=\"font-size: 18pt; color: #0000ff;\"><strong>Como funciona uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o?\u00a0<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-size: 14pt;\">Uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o \u00e9 projetada para operar com base no princ\u00edpio da diferen\u00e7a de press\u00e3o. De acordo com esse princ\u00edpio, o disco da v\u00e1lvula permite o fluxo de fluido atrav\u00e9s da v\u00e1lvula quando a press\u00e3o a montante \u00e9 maior do que a press\u00e3o a jusante. Dessa forma, a energia da press\u00e3o fornece energia mec\u00e2nica usada para for\u00e7ar o disco para cima, deixando um caminho desobstru\u00eddo por onde o fluido passa. Quando o disco abre a passagem do fluxo e a press\u00e3o de suc\u00e7\u00e3o permanece alta, o fluido continua passando pela v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o. Quando a bomba \u00e9 desligada ou quando a press\u00e3o do fluido diminui, o fluxo do fluido tenta se reverter e o disco da v\u00e1lvula retorna \u00e0 sua posi\u00e7\u00e3o de assentamento, impedindo o refluxo.\u00a0<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-post-1286 aligncenter wp-image-3251 size-full\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image006.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o oscilante de alta press\u00e3o\" width=\"780\" height=\"261\" data-lazy-srcset=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image006.jpg 780w, https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image006-768x257.jpg 768w\" data-lazy-sizes=\"(max-width: 780px) 100vw, 780px\" data-lazy-src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image006.jpg\" srcset=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image006.jpg 780w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image006-600x201.jpg 600w, https:\/\/ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image006-768x257.jpg 768w\" sizes=\"(max-width: 780px) 100vw, 780px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-post-1286 wp-image-3251 aligncenter\" src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image006.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o oscilante de alta press\u00e3o\" width=\"780\" height=\"261\" srcset=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image006.jpg 780w, https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image006-768x257.jpg 768w\" sizes=\"(max-width: 780px) 100vw, 780px\"><\/noscript><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 14pt;\">Figura: Funcionamento de uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Types_of_high-pressure_check_valves\"><\/span><span id=\"Types_of_high-pressure_check_valves\"><span style=\"font-size: 18pt; color: #0000ff;\"><strong>Tipos de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"High-pressure_swing_check_valve\"><\/span><span id=\"High-pressure_swing_check_valve\"><span style=\"font-size: 14pt;\"><strong><em>V\u00e1lvula de reten\u00e7\u00e3o oscilante de alta press\u00e3o\u00a0<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">Essa \u00e9 uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o que oferece baixa resist\u00eancia ao fluxo de fluido quando est\u00e1 totalmente aberta. Como o nome sugere, o disco da v\u00e1lvula gira para abrir e fechar a v\u00e1lvula de forma semelhante a um al\u00e7ap\u00e3o. O disco \u00e9 girado em torno de uma dobradi\u00e7a montada fora da sede da v\u00e1lvula. Os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o usam uma arruela de composi\u00e7\u00e3o no disco da v\u00e1lvula para suportar a maior parte do desgaste. A dobradi\u00e7a do pino \u00e9 solta para ajudar o disco a se fechar quando o fluxo de fluido \u00e9 reduzido a zero. As v\u00e1lvulas de reten\u00e7\u00e3o de giro de alta press\u00e3o s\u00e3o montadas na dire\u00e7\u00e3o horizontal, mas tamb\u00e9m podem ser montadas na dire\u00e7\u00e3o vertical, desde que o disco n\u00e3o emperre ao fechar a v\u00e1lvula. Os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o recomendam o uso dessas v\u00e1lvulas em locais onde o fluxo reverso de fluido n\u00e3o \u00e9 frequente, para evitar que a v\u00e1lvula se agite. O projeto dessa v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o evita que fluidos viscosos e sujeira interfiram na rota\u00e7\u00e3o do disco em torno da dobradi\u00e7a.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-post-1286 aligncenter wp-image-3252 size-full\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image008.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o oscilante de alta press\u00e3o\" width=\"528\" height=\"439\" data-lazy-src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image008.jpg\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-post-1286 wp-image-3252 aligncenter\" src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image008.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o oscilante de alta press\u00e3o\" width=\"528\" height=\"439\"><\/noscript><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 14pt;\">Figura: V\u00e1lvula de reten\u00e7\u00e3o oscilante de alta press\u00e3o.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"High-pressure_lift_check_valve\"><\/span><span id=\"High-pressure_lift_check_valve\"><span style=\"font-size: 14pt;\"><strong><em>V\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o de alta press\u00e3o\u00a0<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">Essa \u00e9 uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o na qual o fluido abre o disco da v\u00e1lvula pelo lado inferior. O princ\u00edpio de funcionamento \u00e9 tal que a press\u00e3o de entrada mais alta do que a press\u00e3o de sa\u00edda fornece a for\u00e7a que eleva o disco contra a gravidade ou a mola da v\u00e1lvula e permite o fluxo do fluido. Quando a press\u00e3o do fluido diminui, o disco da v\u00e1lvula \u00e9 for\u00e7ado a retornar \u00e0 posi\u00e7\u00e3o de fechamento pela mola da v\u00e1lvula, refluxo e\/ou gravidade. Os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o projetam essas v\u00e1lvulas com a vantagem de que elas precisam de uma pequena eleva\u00e7\u00e3o para obter a abertura total da v\u00e1lvula. Al\u00e9m disso, os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o projetam essa v\u00e1lvula com uma guia que ajuda o disco a se mover para baixo com precis\u00e3o at\u00e9 a posi\u00e7\u00e3o de assentamento. O problema com essa guia \u00e9 que ela tende a reter sujeira, o que pode fazer com que a v\u00e1lvula permane\u00e7a aberta quando a press\u00e3o do fluido diminui. Fluidos muito viscosos tamb\u00e9m podem prender o disco no retentor, interferindo no fechamento da v\u00e1lvula. As v\u00e1lvulas de reten\u00e7\u00e3o de eleva\u00e7\u00e3o de alta press\u00e3o s\u00e3o vantajosas porque n\u00e3o s\u00e3o propensas a bater como as v\u00e1lvulas de reten\u00e7\u00e3o de giro e s\u00e3o adequadas para uso em aplica\u00e7\u00f5es em que h\u00e1 revers\u00f5es frequentes ou irregulares de fluido.\u00a0<\/span><\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-post-1286 alignnone wp-image-3253 size-full\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image010.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o de alta press\u00e3o\" width=\"499\" height=\"351\" data-lazy-src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image010.jpg\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-post-1286 wp-image-3253\" src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image010.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o de alta press\u00e3o\" width=\"499\" height=\"351\"><\/noscript><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 14pt;\">Figura: V\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o de alta press\u00e3o.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"High-pressure_stop_check_valve\"><\/span><span id=\"High-pressure_stop_check_valve\"><span style=\"font-size: 14pt;\"><strong><em>V\u00e1lvula de reten\u00e7\u00e3o de parada de alta press\u00e3o\u00a0<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">Esse \u00e9 um tipo especial de v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o. Os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o produzem essa v\u00e1lvula com um mecanismo de controle que \u00e9 um volante ou atuador. O objetivo dessa v\u00e1lvula \u00e9 evitar o fluxo reverso de fluido, assim como o de outras v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o. O mecanismo de controle permite fechar o fluxo de fluido apesar do n\u00edvel de press\u00e3o. As v\u00e1lvulas de reten\u00e7\u00e3o de parada de alta press\u00e3o s\u00e3o uma ligeira modifica\u00e7\u00e3o das v\u00e1lvulas globo comuns projetadas com uma haste fixada no disco. No entanto, quando se trata de v\u00e1lvulas de reten\u00e7\u00e3o de parada de alta press\u00e3o, os fabricantes projetam a cabe\u00e7a da haste flutuando no disco, ou seja, ela n\u00e3o est\u00e1 presa. Como o disco n\u00e3o est\u00e1 preso \u00e0 haste da v\u00e1lvula, ele opera por eleva\u00e7\u00e3o, fazendo com que se mova livremente para cima e para baixo quando a haste \u00e9 ajustada para abrir ou fechar o fluxo de fluido. Isso ajuda a controlar o fluxo de fluido, mas se o fluido tentar fluir na dire\u00e7\u00e3o oposta, o disco reage rapidamente para bloquear o fluido. Al\u00e9m disso, usando o mecanismo de controle, a haste pode ser girada para se mover para baixo, for\u00e7ando o disco a se fechar e, assim, impedir o fluxo de fluido para frente ou para tr\u00e1s, conforme necess\u00e1rio.\u00a0<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-post-1286 aligncenter wp-image-3254 size-full\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image012-1.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o de parada de alta press\u00e3o\" width=\"301\" height=\"411\" data-lazy-src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image012-1.jpg\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-post-1286 wp-image-3254 aligncenter\" src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image012-1.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o de parada de alta press\u00e3o\" width=\"301\" height=\"411\"><\/noscript><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 14pt;\">Figura: V\u00e1lvula de reten\u00e7\u00e3o de parada de alta press\u00e3o.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Spring_loaded_high-pressure_check_valve\"><\/span><span id=\"Spring_loaded_high-pressure_check_valve\"><span style=\"font-size: 14pt;\"><strong><em>V\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o com mola\u00a0<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-size: 14pt;\">Essa \u00e9 uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o que \u00e9 fechada com o uso de uma mola. A mola e o disco trabalham juntos, de modo que a mola \u00e9 comprimida pela press\u00e3o do fluido de suc\u00e7\u00e3o, permitindo que o disco se mova para frente. Isso cria espa\u00e7o livre para o fluido passar pela v\u00e1lvula. Quando a press\u00e3o do fluido de suc\u00e7\u00e3o diminui, a mola \u00e9 aliviada da compress\u00e3o, fazendo-a reverter e, assim, o disco se move para a posi\u00e7\u00e3o de fechamento, onde impede o fluxo reverso do fluido. Os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o com mola podem usar a mola para projetar uma v\u00e1lvula em forma de Y, carregada em linha ou verticalmente. Uma vantagem das v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o com mola \u00e9 que elas podem ser instaladas na posi\u00e7\u00e3o vertical ou horizontal, pois n\u00e3o dependem da gravidade para fechar.\u00a0<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-post-1286 aligncenter wp-image-3255 size-full\" src=\"https:\/\/ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image014.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o com mola\" width=\"393\" height=\"303\" data-lazy-src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image014.jpg\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-post-1286 wp-image-3255 aligncenter\" src=\"https:\/\/i0.wp.com\/www.ntgdvalve.com\/wp-content\/uploads\/2020\/06\/image014.jpg\" alt=\"V\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o com mola\" width=\"393\" height=\"303\"><\/noscript><\/p>\n<p style=\"text-align: center;\"><span style=\"font-size: 14pt;\">Figura: V\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o com mola.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Applications_of_high-pressure_check_valve\"><\/span><span id=\"Applications_of_high-pressure_check_valve\"><span style=\"font-size: 18pt; color: #0000ff;\"><strong>Aplica\u00e7\u00f5es da v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><span style=\"font-size: 14pt;\">As v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o s\u00e3o usadas em aplica\u00e7\u00f5es de minera\u00e7\u00e3o.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Eles s\u00e3o usados em aplica\u00e7\u00f5es de tratamento de \u00e1gua doce e de \u00e1guas residuais.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Eles s\u00e3o usados em aplica\u00e7\u00f5es de alimentos e bebidas.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Eles s\u00e3o usados em aplica\u00e7\u00f5es de combate a inc\u00eandios.<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">As v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o s\u00e3o usadas em usinas de gera\u00e7\u00e3o de energia a vapor.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Eles s\u00e3o usados em plantas de processamento qu\u00edmico.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">As v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o s\u00e3o usadas nos setores de refinaria de petr\u00f3leo e g\u00e1s.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Eles s\u00e3o usados no transporte de g\u00e1s natural liquefeito e petr\u00f3leo bruto.\u00a0<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Advantages_of_high-pressure_check_valves\"><\/span><span id=\"Advantages_of_high-pressure_check_valves\"><span style=\"font-size: 18pt; color: #0000ff;\"><strong>Vantagens das v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><span style=\"font-size: 14pt;\">Eles podem suportar alta press\u00e3o e alta temperatura.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Eles n\u00e3o t\u00eam fluxo reverso de fluido.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Eles n\u00e3o apresentam vazamentos devido \u00e0s veda\u00e7\u00f5es apertadas e aos materiais de alta resist\u00eancia utilizados.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Eles operam automaticamente.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">As v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o t\u00eam alta efici\u00eancia devido \u00e0 baixa perda de press\u00e3o.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Essas v\u00e1lvulas mant\u00eam a press\u00e3o de trabalho.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">As v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o s\u00e3o vers\u00e1teis, pois podem funcionar em diferentes aplica\u00e7\u00f5es.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Eles s\u00e3o f\u00e1ceis de instalar e reparar.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Eles s\u00e3o dur\u00e1veis, pois podem ser consertados se quebrarem.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">As v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o operam muito rapidamente para abrir ou fechar.\u00a0<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Disadvantages_of_high-pressure_check_valves\"><\/span><span id=\"Disadvantages_of_high-pressure_check_valves\"><span style=\"font-size: 18pt; color: #0000ff;\"><strong>Desvantagens das v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><span style=\"font-size: 14pt;\">As v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o s\u00e3o pesadas em compara\u00e7\u00e3o com outras v\u00e1lvulas de reten\u00e7\u00e3o.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Essas v\u00e1lvulas tendem a sofrer efeitos de golpe de ar\u00edete.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Eles n\u00e3o funcionam bem em fluxo de fluido pulsante.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Elas s\u00e3o mais caras em rela\u00e7\u00e3o a outras v\u00e1lvulas de reten\u00e7\u00e3o.\u00a0<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Troubleshooting_high-pressure_check_valves\"><\/span><span id=\"Troubleshooting_high-pressure_check_valves\"><span style=\"font-size: 18pt; color: #0000ff;\"><strong>Solu\u00e7\u00e3o de problemas em v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Valve_vibrateschatters\"><\/span><span id=\"Valve_vibrateschatters\"><span style=\"font-size: 14pt;\"><strong><em>A v\u00e1lvula vibra\/chateia<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-size: 14pt;\">Alta velocidade do fluido. Verifique se o n\u00edvel de velocidade do fluido est\u00e1 de acordo com as instru\u00e7\u00f5es do fabricante da v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o.\u00a0<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Internal_fluid_leakage\"><\/span><span id=\"Internal_fluid_leakage\"><span style=\"font-size: 14pt;\"><strong><em>Vazamento de fluido interno\u00a0<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-size: 14pt;\">Materiais estranhos na v\u00e1lvula. Abra a v\u00e1lvula e remova todos os materiais estranhos.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">O-rings desgastados. Substitua os an\u00e9is O-ring.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Assento danificado. Substitua o assento.<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"External_fluid_leakage\"><\/span><span id=\"External_fluid_leakage\"><span style=\"font-size: 14pt;\"><strong><em>Vazamento de fluido externo\u00a0<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-size: 14pt;\">Parafusos e porcas soltos. Aperte os parafusos e as porcas com o n\u00edvel de torque recomendado pelo fabricante da v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Junta desgastada. Substitua a junta.\u00a0<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"The_fluid_does_not_flow_through_the_high-pressure_check_valve\"><\/span><span id=\"The_fluid_does_not_flow_through_the_high-pressure_check_valve\"><span style=\"font-size: 14pt;\"><strong><em>O fluido n\u00e3o passa pela v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o\u00a0<\/em><\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><span style=\"font-size: 14pt;\">Instala\u00e7\u00e3o incorreta. Instale a v\u00e1lvula de modo que a dire\u00e7\u00e3o do fluxo do fluido seja a mesma da seta de fluxo indicada na v\u00e1lvula. Siga todas as outras instru\u00e7\u00f5es de instala\u00e7\u00e3o indicadas pelo fabricante da v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o no manual do usu\u00e1rio.<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Bloqueio da tubula\u00e7\u00e3o. Verifique se h\u00e1 algum bloqueio na tubula\u00e7\u00e3o que alimenta o fluido para a v\u00e1lvula e remova qualquer material que esteja bloqueando o fluxo do fluido.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">V\u00e1lvula a jusante fechada. Abra a v\u00e1lvula a jusante para criar uma diferen\u00e7a de press\u00e3o.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 14pt;\">Baixo fluxo de suc\u00e7\u00e3o. Aumente a press\u00e3o do fluxo de suc\u00e7\u00e3o at\u00e9 o valor de press\u00e3o recomendado pelo fabricante da v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o.\u00a0<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Summary\"><\/span><span id=\"Summary\"><span style=\"font-size: 18pt; color: #0000ff;\"><strong>Resumo\u00a0<\/strong><\/span><\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-size: 14pt;\">A v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o \u00e9 uma v\u00e1lvula forte destinada a evitar o fluxo reverso de fluido e foi projetada para funcionar em aplica\u00e7\u00f5es de alta press\u00e3o acima de 500 PSI. Os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o projetam esse tipo de v\u00e1lvula para funcionar com base no princ\u00edpio da diferen\u00e7a de press\u00e3o, no qual o disco da v\u00e1lvula se abre quando a press\u00e3o de suc\u00e7\u00e3o excede a press\u00e3o de sa\u00edda. <\/span><\/p>\n<p><span style=\"font-size: 14pt;\">Esse princ\u00edpio de funcionamento ajuda a v\u00e1lvula a trabalhar automaticamente sem um atuador de v\u00e1lvula ou volante, com exce\u00e7\u00e3o de uma v\u00e1lvula de reten\u00e7\u00e3o de parada de alta press\u00e3o. A v\u00e1lvula do tipo stop tem um volante que \u00e9 usado para interromper o fluxo do fluido independentemente do n\u00edvel de press\u00e3o. Os fabricantes de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o produzem essa v\u00e1lvula usando materiais met\u00e1licos resistentes e a v\u00e1lvula tem flanges para conex\u00e3o com a tubula\u00e7\u00e3o. Al\u00e9m disso, a v\u00e1lvula pode ser conectada ao tubo usando o m\u00e9todo de soldagem. <\/span><\/p>\n<p><span style=\"font-size: 14pt;\">Os v\u00e1rios tipos de v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o s\u00e3o: v\u00e1lvula de reten\u00e7\u00e3o oscilante de alta press\u00e3o, v\u00e1lvula de reten\u00e7\u00e3o de parada de alta press\u00e3o, v\u00e1lvula de reten\u00e7\u00e3o de eleva\u00e7\u00e3o de alta press\u00e3o e v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o com mola, entre outras. As aplica\u00e7\u00f5es das v\u00e1lvulas de reten\u00e7\u00e3o de alta press\u00e3o s\u00e3o petr\u00f3leo e g\u00e1s, tratamento de \u00e1guas residuais, produtos qu\u00edmicos, alimentos e bebidas, combate a inc\u00eandios, minera\u00e7\u00e3o e aplica\u00e7\u00f5es de energia a vapor, entre outras. As vantagens de adquirir uma v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o s\u00e3o a alta resist\u00eancia, a opera\u00e7\u00e3o autom\u00e1tica, a alta efici\u00eancia, o vazamento zero, a capacidade de manter a press\u00e3o, a aus\u00eancia de fluxo reverso e a opera\u00e7\u00e3o r\u00e1pida. No entanto, essas v\u00e1lvulas s\u00e3o pesadas em rela\u00e7\u00e3o a outras v\u00e1lvulas de reten\u00e7\u00e3o e podem permitir o fluxo de fluido em apenas uma dire\u00e7\u00e3o. \u00a0<\/span><\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>\u203b Castelo do selo de press\u00e3o<br \/>\n\u203b Faixa de tamanho: NPS 2 a NPS 36<br \/>\n\u203b Faixa de press\u00e3o: 150LB a 2500LB<br \/>\n\u203b Padr\u00e3o de projeto: BS 1868\/ ASME B16.34<br \/>\n\u203b Fabricante de v\u00e1lvula de reten\u00e7\u00e3o de alta press\u00e3o<\/p>","protected":false},"featured_media":6531,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_eb_attr":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[93],"product_tag":[],"class_list":["post-4730","product","type-product","status-publish","has-post-thumbnail","product_cat-check-valve","desktop-align-left","tablet-align-left","mobile-align-left","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/ntgdvalve.com\/pt\/wp-json\/wp\/v2\/product\/4730","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ntgdvalve.com\/pt\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/ntgdvalve.com\/pt\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/ntgdvalve.com\/pt\/wp-json\/wp\/v2\/comments?post=4730"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ntgdvalve.com\/pt\/wp-json\/wp\/v2\/media\/6531"}],"wp:attachment":[{"href":"https:\/\/ntgdvalve.com\/pt\/wp-json\/wp\/v2\/media?parent=4730"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/ntgdvalve.com\/pt\/wp-json\/wp\/v2\/product_brand?post=4730"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/ntgdvalve.com\/pt\/wp-json\/wp\/v2\/product_cat?post=4730"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/ntgdvalve.com\/pt\/wp-json\/wp\/v2\/product_tag?post=4730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}