{"id":2510,"count":4,"description":"\r\n

V\u00e1lvula de gaveta de \u00e1gua<\/h1>\r\n\r\n\r\n\r\n\r\nA v\u00e1lvula de gaveta de isolamento de \u00e1gua com sede resiliente da ZECO da China \u00e9 amplamente utilizada e confi\u00e1vel no sistema de abastecimento de \u00e1gua e drenagem de empresas de abastecimento de \u00e1gua, empresas de esgoto e v\u00e1rias ind\u00fastrias nas grandes cidades da China. Fundada em 1991, naquela \u00e9poca somos os \u00fanicos fabricantes de v\u00e1lvulas gaveta na China, e \u00e9 o mercado chin\u00eas a introduzir o primeiro desenvolvimento e produ\u00e7\u00e3o de fabricantes de v\u00e1lvulas gaveta em ferro fundido, e j\u00e1 conhecidos no campo da produ\u00e7\u00e3o de v\u00e1lvulas gaveta de \u00e1gua para por mais de d\u00e9cadas, embora o mercado de outras v\u00e1lvulas de gaveta da China seja muito comum e o pre\u00e7o seja baixo, mas a durabilidade e confiabilidade, acreditamos que nossa profunda pesquisa e desenvolvimento e rica experi\u00eancia de produ\u00e7\u00e3o s\u00e3o os alicerces pelos quais somos fornecedores confi\u00e1veis de v\u00e1lvulas de gaveta de nossos clientes.\r\n\r\n\r\n\r\n\r\n

Tipos de v\u00e1lvula gaveta<\/h2>\r\n\r\n\r\n\r\n
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V\u00e1lvula de gaveta com veda\u00e7\u00e3o resiliente<\/figcaption><\/figure>\r\n\r\n\r\n<\/div>\r\n\r\n\r\n\r\n
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V\u00e1lvula de gaveta de ferro d\u00factil<\/figcaption><\/figure>\r\n\r\n\r\n<\/div>\r\n\r\n\r\n\r\n
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V\u00e1lvula de gaveta com sede de metal<\/figcaption><\/figure>\r\n\r\n\r\n<\/div>\r\n\r\n\r\n<\/div>\r\n\r\n\r\n\r\n
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V\u00e1lvula de guilhotina<\/figcaption><\/figure>\r\n\r\n\r\n<\/div>\r\n\r\n\r\n\r\n
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Como funciona uma v\u00e1lvula gaveta?<\/h2>\r\n\r\n\r\n\r\n\r\nUma v\u00e1lvula gaveta \u00e9 a v\u00e1lvula mais comum para sistemas de abastecimento de \u00e1gua. Representa uma v\u00e1lvula de isolamento de movimento linear e tem a fun\u00e7\u00e3o de parar ou permitir o fluxo. As v\u00e1lvulas gaveta receberam o nome do elemento de fechamento que desliza para dentro do fluxo para fornecer fechamento e, portanto, agir como uma comporta. As v\u00e1lvulas gaveta s\u00e3o utilizadas para isolar \u00e1reas espec\u00edficas da rede de abastecimento de \u00e1gua durante manuten\u00e7\u00e3o, reparos, novas instala\u00e7\u00f5es, bem como para redirecionar o fluxo de \u00e1gua ao longo da tubula\u00e7\u00e3o.\r\n\r\n\r\n\r\n\r\n\r\nAs v\u00e1lvulas gaveta s\u00e3o normalmente operadas por um volante, uma chave T da v\u00e1lvula (chave inglesa) ou um atuador. A roda est\u00e1 presa a uma haste de v\u00e1lvula e transfere energia rotacional para ela. Durante a abertura da v\u00e1lvula gaveta, a rota\u00e7\u00e3o do volante gira as roscas da haste da comporta para dentro da comporta e vice-versa para o fechamento. Esta energia move a cunha da v\u00e1lvula gaveta para baixo ou para cima. Nas instala\u00e7\u00f5es subterr\u00e2neas de v\u00e1lvulas gaveta, \u00e9 acoplado um fuso de extens\u00e3o, que permite a opera\u00e7\u00e3o sem acesso direto \u00e0 pr\u00f3pria v\u00e1lvula.\r\n\r\n\r\n\r\n\r\n\r\nGeralmente, as v\u00e1lvulas gaveta s\u00e3o instaladas nas \u00e1reas de uma tubula\u00e7\u00e3o onde permanecer\u00e3o abertas ou fechadas por mais tempo, pois geralmente requerem algum tempo para alternar entre essas duas posi\u00e7\u00f5es. No entanto, quando a v\u00e1lvula precisa ser operada com bastante frequ\u00eancia ou mesmo remotamente, s\u00e3o utilizadas v\u00e1lvulas gaveta motorizadas (ou seja, equipadas com um atuador el\u00e9trico).\r\n\r\n\r\n\r\n\r\n
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Como escolher a v\u00e1lvula gaveta certa?<\/h2>\r\n\r\n\r\n\r\n\r\nA escolha de uma v\u00e1lvula gaveta resistente e dur\u00e1vel pode reduzir o custo de substitui\u00e7\u00f5es caras no futuro. Aqui est\u00e3o alguns crit\u00e9rios de sele\u00e7\u00e3o:\r\n\r\n\r\n\r\n\r\n

Design de cunha<\/strong><\/h3>\r\n\r\n\r\n\r\n\r\nA cunha \u00e9 a parte de veda\u00e7\u00e3o da v\u00e1lvula gaveta, por isso \u00e9 muito importante.\r\n\r\n\r\n\r\n\r\n\r\nPorca de cunha: A porca de cunha conecta a cunha \u00e0 haste da v\u00e1lvula. Existem dois designs b\u00e1sicos de porcas em cunha; um design de porca em cunha solta, no qual a porca de lat\u00e3o desliza em uma ranhura no n\u00facleo da cunha; e um design de porca de cunha fixa em que a porca se expande no n\u00facleo da cunha. Com o desenho da porca em cunha fixa, o n\u00famero de pe\u00e7as m\u00f3veis \u00e9 reduzido, eliminando assim o risco de corros\u00e3o devido ao dano da superf\u00edcie de borracha do n\u00facleo da cunha pelas pe\u00e7as m\u00f3veis. Portanto, \u00e9 recomendado usar um projeto de porca de cunha fixa.\r\n\r\n\r\n\r\n\r\n\r\nPlaca guia em cunha e sapata deslizante: Ao abrir e fechar a v\u00e1lvula durante a opera\u00e7\u00e3o da tubula\u00e7\u00e3o, a placa em cunha suporta atrito e press\u00e3o. O dispositivo guia na junta em cunha coopera com a ranhura correspondente no corpo principal para ajudar a estabilizar a posi\u00e7\u00e3o da cunha durante a opera\u00e7\u00e3o e garantir que a haste da v\u00e1lvula n\u00e3o dobre a jusante devido \u00e0 vaz\u00e3o. As sapatas em forma de cunha ajudam a garantir que a borracha na superf\u00edcie em forma de cunha n\u00e3o se desgaste devido ao atrito entre a cunha e os trilhos internos. Certifique-se de fixar a cunha na cunha e certifique-se de que a camada de borracha sob ela seja suficiente para evitar a corros\u00e3o do n\u00facleo da cunha.\r\n\r\n\r\n\r\n\r\n\r\nBorracha: A cunha deve ser totalmente vulcanizada com borracha, e a quantidade de borracha na \u00e1rea de veda\u00e7\u00e3o da cunha \u00e9 suficiente para absorver impurezas na sede da v\u00e1lvula, o que \u00e9 muito importante para a veda\u00e7\u00e3o da v\u00e1lvula. A forte liga\u00e7\u00e3o entre a borracha e o n\u00facleo da cunha \u00e9 importante para garantir a veda\u00e7\u00e3o adequada mesmo quando a borracha \u00e9 comprimida e para evitar a corros\u00e3o por flu\u00eancia mesmo se objetos pontiagudos penetrarem na borracha durante o fechamento da v\u00e1lvula.\r\n\r\n\r\n\r\n\r\n

Qualidade de borracha<\/strong><\/h3>\r\n\r\n\r\n\r\n\r\nA qualidade da borracha \u00e9 fundamental para a durabilidade e o funcionamento da v\u00e1lvula. A borracha deve ser capaz de suportar o impacto cont\u00ednuo de impurezas e produtos qu\u00edmicos sem ser danificada e deve ser capaz de absorver pequenas impurezas na sede da v\u00e1lvula para torn\u00e1-la hermeticamente vedada.\r\n\r\n\r\n\r\n\r\n

Prote\u00e7\u00e3o externa contra corros\u00e3o<\/strong><\/h3>\r\n\r\n\r\n\r\n\r\nA prote\u00e7\u00e3o externa contra corros\u00e3o \u00e9 cr\u00edtica para a vida \u00fatil da v\u00e1lvula. Recomenda-se usar de acordo com DIN 3476 Parte 1, EN 14901 e GSK\r\n\r\n\r\n\r\n\r\n

Estrutura r\u00edgida<\/strong><\/h3>\r\n\r\n\r\n\r\n\r\nExistem duas quest\u00f5es importantes de design:\r\n\r\n\r\n\r\n\r\n\r\nVeda\u00e7\u00e3o da haste: A veda\u00e7\u00e3o na tampa ao redor da haste pode manter a press\u00e3o dentro da v\u00e1lvula\/tubo. As veda\u00e7\u00f5es da haste devem sempre ser projetadas para serem isentas de manuten\u00e7\u00e3o e devem garantir a vida \u00fatil da v\u00e1lvula ou pelo menos atender aos requisitos de vida \u00fatil da EN 1074-2. A veda\u00e7\u00e3o principal que mant\u00e9m a press\u00e3o interna \u00e9 melhor projetada como uma veda\u00e7\u00e3o hidr\u00e1ulica, de modo a obter uma veda\u00e7\u00e3o mais estanque e ao mesmo tempo aumentar a press\u00e3o interna. A veda\u00e7\u00e3o sobressalente deve ser colocada ao redor da haste da v\u00e1lvula. Para proteger a veda\u00e7\u00e3o contra contamina\u00e7\u00e3o externa, uma veda\u00e7\u00e3o deve ser colocada ao redor da haste superior. Por raz\u00f5es de seguran\u00e7a e sa\u00fade, os compostos de borracha EPDM de alta qualidade aprovados para \u00e1gua pot\u00e1vel devem ser utilizados em locais em contato direto com a \u00e1gua pot\u00e1vel.\r\n\r\n\r\n\r\n\r\n\r\nVeda\u00e7\u00e3o da tampa\/corpo: A estanqueidade entre a tampa e o corpo da v\u00e1lvula pode ser obtida usando uma junta embutida no recesso da v\u00e1lvula. Este design garante que a junta permane\u00e7a na posi\u00e7\u00e3o correta e n\u00e3o ser\u00e1 estourada devido a flutua\u00e7\u00f5es de press\u00e3o. Para proteger os parafusos da tampa contra corros\u00e3o, a junta da tampa deve envolver os parafusos e os parafusos devem ser embutidos na v\u00e1lvula de forma que nenhuma rosca fique exposta.\r\n\r\n\r\n\r\n\r\n

Desempenho geral<\/strong><\/h3>\r\n\r\n\r\n\r\n\r\nAo operar a v\u00e1lvula gaveta atrav\u00e9s do volante ou atuador el\u00e9trico, preste aten\u00e7\u00e3o ao torque de opera\u00e7\u00e3o e fechamento.\r\n\r\n\r\n\r\n\r\n\r\nPassagem total: Para poder utilizar equipamento de limpeza de tubula\u00e7\u00f5es, o di\u00e2metro interno da v\u00e1lvula deve ser consistente com o tamanho nominal da v\u00e1lvula.\r\n\r\n","link":"https:\/\/zecovalve.com\/pt\/categoria-do-produto\/gate-valve\/water-gate-valve","name":"V\u00e1lvula de gaveta de \u00e1gua","slug":"water-gate-valve","taxonomy":"product_cat","parent":2052,"meta":[],"yoast_head":"\nWater Gate Valve - ZECO Valve<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zecovalve.com\/pt\/categoria-do-produto\/gate-valve\/water-gate-valve\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Water Gate Valve - ZECO Valve\" \/>\n<meta property=\"og:description\" content=\"Water Gate Valve The resilient seated water isolation gate valve of ZECO from China\u00a0is widely used and reliable in the water supply and drainage system of water supply company, sewage company, and various industries in big cities of China. Established in 1991, at that time we are the only gate valve manufacturers in China, and it is the Chinese market to introduce and the earliest development and production of cast iron gate valve manufacturers, and already known in the field of water gate valve production for more than decades, although the market of other China gate valves are very common and the price is low, but the durability and reliability, we believe that our deep research and development and rich production experience are the foundations why we are trusted gate valve supplier of our customers. Types of Gate Valve Resilient Seated Gate Valve Ductile Iron Gate Valve Metal Seated Gate Valve Knife Gate Valve How Does a Gate Valve Work? A gate valve is the most common valve for water supply systems. It represents a linear-motion isolation valve and has a function to stop or allow the flow. Gate valves got their name from the closure element sliding into the flow stream to provide shutoff and, therefore, acting like a gate. Gate valves are used to isolate specific areas of the water supply network during maintenance, repair works, new installations, as well as to reroute water flow throughout the pipeline. Gate valves are normally operated by a handwheel, a valve T-key (wrench), or an actuator. The wheel is attached to a valve stem and transfers rotational energy to it. During the gate valve opening, the rotation of the handwheel turns the threads of the gate stem into the gate and vice versa for closing. This energy moves the gate valve wedge downwards or upwards. In underground gate valve installations, an extension spindle is attached, which allows operation without direct access to the valve itself. Generally, gate valves are installed in the areas of a pipeline where they will longer remain open or closed, as they generally require some time to switch between these two positions. However, when the valve needs to be operated quite often or even remotely, motorized gate valves are used (i.e. equipped with an electric actuator). How to Choose the Right Gate Valve? Choosing a sturdy and durable gate valve can reduce the cost of expensive replacement in the future. Here are some selection criteria: Wedge design The wedge is the sealing part of the gate valve, so it is very important. Wedge nut: The wedge nut connects the wedge to the valve stem. There are two basic wedge nut designs; a loose wedge nut design in which the brass nut slides in a groove in the wedge core; and a fixed wedge nut design in which the nut expands in the wedge core. With the fixed wedge nut design, the number of movable parts is reduced, thus eliminating the risk of corrosion due to the damage of the rubber surface of the wedge core by the moving parts. Therefore, it is recommended to use a fixed wedge nut design. Wedge guide plate and sliding shoe: When opening and closing the valve during pipeline operation, the wedge plate bears friction and pressure. The guide device on the wedge joint cooperates with the corresponding groove in the main body to help stabilize the wedge position during operation and ensure that the valve stem will not bend downstream due to the flow rate. The wedge-shaped track shoes help ensure that the rubber on the wedge-shaped surface does not wear out due to friction between the wedge and the internal rails. Make sure to fix the wedge on the wedge and make sure that the rubber layer under it is sufficient to prevent the wedge core from corroding. Rubber: The wedge must be fully vulcanized with rubber, and the amount of rubber in the sealing area of the wedge is sufficient to absorb impurities in the valve seat, which is very important for the sealing of the valve. The strong bond between the rubber and the wedge core is important to ensure proper sealing even when the rubber is compressed and to prevent creep corrosion even if sharp objects penetrate the rubber during closing of the valve. Rubber quality Rubber quality is critical to durability and valve function. Rubber must be able to withstand the continuous impact of impurities and chemicals without being damaged, and must be able to absorb small impurities in the valve seat to make it tightly sealed. External corrosion protection External corrosion protection is critical to the service life of the valve. It is recommended to use in accordance with DIN 3476 Part 1, EN 14901 and GSK Tight structure There are two important design issues: Stem seal: The seal on the bonnet around the stem can maintain the pressure inside the valve\/pipe. Stem seals should always be designed to be maintenance-free and should provide the service life of the valve or at least meet the service life requirements of EN 1074-2. The main seal that maintains the internal pressure is best designed as a hydraulic seal, so as to achieve a tighter seal while increasing the internal pressure. The spare seal should be placed around the valve stem. In order to protect the seal from external contamination, a seal should be placed around the top stem. For safety and health reasons, high-quality EPDM rubber compounds approved for drinking water must be used in places in direct contact with drinking water. Bonnet\/body seal: The tightness between the bonnet and the valve body can be achieved by using a gasket embedded in the valve recess. This design ensures that the gasket remains in the correct position and will not be blown out due to pressure fluctuations. In order to protect the bonnet bolts from corrosion, the bonnet gasket should surround the bolts, and the bolts should be embedded in the valve in such a way that no threads are exposed. General performance When operating the gate valve through the handwheel or electric actuator, be sure to pay attention to the operating and closing torque. Full bore: In order to be able to use pipeline cleaning equipment, the inner diameter of the valve should be consistent with the nominal size of the valve.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zecovalve.com\/pt\/categoria-do-produto\/gate-valve\/water-gate-valve\" \/>\n<meta property=\"og:site_name\" content=\"ZECO Valve\" \/>\n<meta property=\"og:image\" content=\"https:\/\/zecovalve.com\/wp-content\/uploads\/2022\/06\/resilient-seated-gate-valve.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/zecovalve.com\/#website\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"ZECO Valve\",\"description\":\"Industrial Ball Valve, Gate Valve and Globe Valve Manufacturer\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/zecovalve.com\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"CollectionPage\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/water-gate-valve#webpage\",\"url\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/water-gate-valve\",\"name\":\"Water Gate Valve - ZECO Valve\",\"isPartOf\":{\"@id\":\"https:\/\/zecovalve.com\/#website\"},\"breadcrumb\":{\"@id\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/water-gate-valve#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/zecovalve.com\/product-category\/gate-valve\/water-gate-valve\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/water-gate-valve#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/\",\"url\":\"https:\/\/zecovalve.com\/\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"position\":2,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\",\"url\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\",\"name\":\"Gate Valve\"}},{\"@type\":\"ListItem\",\"position\":3,\"item\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/water-gate-valve\",\"url\":\"https:\/\/zecovalve.com\/product-category\/gate-valve\/water-gate-valve\",\"name\":\"Water Gate Valve\"}}]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","_links":{"self":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/product_cat\/2510","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/product_cat"}],"about":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/taxonomies\/product_cat"}],"up":[{"embeddable":true,"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/product_cat\/2052"}],"wp:post_type":[{"href":"https:\/\/zecovalve.com\/pt\/wp-json\/wp\/v2\/product?product_cat=2510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}