Inevitavelmente encontraremos algumas falhas no processo de utiliza\u00e7\u00e3o da v\u00e1lvula gaveta de a\u00e7o fundido. Como devemos lidar com essas falhas? Hoje apresentaremos as solu\u00e7\u00f5es para solucionar falhas da v\u00e1lvula gaveta de a\u00e7o fundido.<\/p>\n\n\n\n\n\n
A rachadura da v\u00e1lvula gaveta de a\u00e7o fundido (ou deforma\u00e7\u00e3o inferior) aparece principalmente nos produtos de estrutura de placa paralela Z944\/Z964. Ocorre quando a parte inferior da placa da v\u00e1lvula gaveta de a\u00e7o fundido atinge diretamente o corpo da v\u00e1lvula. Al\u00e9m disso, \u00e9 muito f\u00e1cil ocorrer quando o curso de fechamento n\u00e3o est\u00e1 definido ou o limite falha devido ao comissionamento inadequado da v\u00e1lvula el\u00e9trica.<\/p>\n\n\n\n
Rachaduras na superf\u00edcie de veda\u00e7\u00e3o ocorrem principalmente em v\u00e1lvulas de a\u00e7o fundido feitas de liga de a\u00e7o, que geralmente s\u00e3o causadas por processos irracionais. A sele\u00e7\u00e3o razo\u00e1vel de materiais e o controle razo\u00e1vel dos par\u00e2metros do processo de soldagem podem evitar isso.<\/p>\n\n\n\n
O emperramento da v\u00e1lvula gaveta de a\u00e7o fundido mostra que a comporta est\u00e1 presa no lado do trilho-guia da cavidade intermedi\u00e1ria do corpo da v\u00e1lvula, ou mesmo separada da haste da v\u00e1lvula. \u00c9 causado principalmente por projeto e fabrica\u00e7\u00e3o inadequados, como tamanho inadequado da largura de contato do trilho-guia e superf\u00edcie \u00e1spera do trilho-guia.<\/p>\n\n\n\n
Quando a comporta est\u00e1 presa na sede da v\u00e1lvula de gaveta de a\u00e7o fundido e a haste da v\u00e1lvula \u00e9 levantada \u00e0 for\u00e7a, a ranhura em forma de T da comporta freq\u00fcentemente quebra ou deforma para evitar o fator de \u201cimpulso anormal\u201d. A diferen\u00e7a de temperatura e a for\u00e7a de fechamento s\u00e3o dois motivos principais aos quais vale a pena prestar aten\u00e7\u00e3o.<\/p>\n\n\n\n
Existe uma condi\u00e7\u00e3o operacional t\u00edpica de diferen\u00e7a de temperatura. Se as v\u00e1lvulas de a\u00e7o fundido forem fechadas a frio e depois abertas a quente, o torque de fechamento da comporta aumentar\u00e1 e resultar\u00e1 no emperramento da comporta devido \u00e0 expans\u00e3o t\u00e9rmica e ao alongamento da haste da v\u00e1lvula.<\/p>\n\n\n\n
Se o estado quente for fechado e o estado frio for aberto, a largura da virilha ficar\u00e1 maior devido \u00e0 deforma\u00e7\u00e3o t\u00e9rmica das sedes das v\u00e1lvulas em ambos os lados. O estado frio far\u00e1 com que eles encolham e fiquem menores, resultando no travamento do port\u00e3o. Se os dois estados acima forem acompanhados por uma forte \u201cfor\u00e7a de fechamento\u201d. Se o acionamento el\u00e9trico n\u00e3o estiver ajustado corretamente ou o mecanismo de refor\u00e7o, como uma chave inglesa ou alavanca, for usado incorretamente, h\u00e1 uma chance maior de travamento da comporta da v\u00e1lvula gaveta de a\u00e7o fundido.<\/p>\n\n\n\n
A ZECO possui um sistema completo de gest\u00e3o da qualidade do produto. Passou por certifica\u00e7\u00f5es como API6D, CE\/PED, ISO9001, IS014001, ISO18001, WRAS, FM e TS. Al\u00e9m disso, foi reconhecido por empresas de petr\u00f3leo e g\u00e1s. ZEC0 tem coopera\u00e7\u00e3o de longo prazo com a China National Chemical Equipment (CNCE) e a China Petroleum & Chemical Engineering Survey and Design Association (CPCESDA).<\/p>\n\n\n\n
A ZECO desenvolveu seu laborat\u00f3rio para P&D de inova\u00e7\u00e3o e valida\u00e7\u00e3o de projetos de v\u00e1lvulas de padr\u00e3o internacional, incluindo testes PT, MTUT e FE. Se voc\u00ea tiver alguma necessidade, entre em contato conosco.<\/p>\n\n\n\n\n
Inevitavelmente encontraremos algumas falhas no processo de utiliza\u00e7\u00e3o da v\u00e1lvula gaveta de a\u00e7o fundido. Como devemos lidar com isso\u2026 Ler mais<\/a><\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","kt_blocks_editor_width":"","footnotes":""},"categories":[1928],"tags":[2176,3268,3],"class_list":["post-16609","post","type-post","status-publish","format-standard","hentry","category-gate-valve","tag-cast-steel-gate-valve","tag-difference-between-cast-and-forged","tag-gate-valve","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"featured_image_src_large":false,"author_info":{"display_name":"Jerry","author_link":"https:\/\/zecovalve.com\/pt\/author\/jerry"},"comment_info":0,"category_info":[{"term_id":1928,"name":"Gate Valve","slug":"gate-valve","term_group":0,"term_taxonomy_id":1928,"taxonomy":"category","description":"","parent":0,"count":48,"filter":"raw","cat_ID":1928,"category_count":48,"category_description":"","cat_name":"Gate Valve","category_nicename":"gate-valve","category_parent":0}],"tag_info":[{"term_id":2176,"name":"cast steel gate valve","slug":"cast-steel-gate-valve","term_group":0,"term_taxonomy_id":2176,"taxonomy":"post_tag","description":"","parent":0,"count":9,"filter":"raw"},{"term_id":3268,"name":"Difference Between Cast and Forged","slug":"difference-between-cast-and-forged","term_group":0,"term_taxonomy_id":3268,"taxonomy":"post_tag","description":"\r\n\r\n\r\nSTEEL FORGING VS CASTING\r\n\r\n\r\n\r\n\r\nThe casting process is preferred for:\r\n\r\n\r\n\r\n\r\n\r\n \tparts and components that would be too complex or expensive to manufacture by steel forging (example: large valve bodies);\r\n \tparts that have internal cavities;\r\n \tlarge sized parts (there are virtually no size limits in terms of the weight of the parts that can be produced with the casting process);\r\n \tparts in special alloys (some specific alloys are more difficult to forge than cast, for example, those with a high content of Nickel and Moly, which have considerable resistance to mechanical forces);\r\n \tparts requiring mass production and small lots.\r\n\r\n\r\n\r\n\r\n\r\nThe forging process is preferred for:\r\n\r\n\r\n\r\n\r\n\r\n \tparts requiring extremely high strength, toughness, and resistance (indeed, during the forging process the steel grain structure gets modified to conform to the shape of the final product \u2013 with high uniformity of composition and metallurgical recrystallization);\r\n \tparts that have to withstand stronger impacts and mechanical forces;\r\n \tparts where porosity, the risk of a gas void, pockets, and the possible formation of cavities (even micro-granular) are not acceptable;\r\n \tproduction of mechanically strong parts without using expensive alloys;\r\n \tparts that require high wear resistance;\r\n \tparts subject to high loads and stress;\r\n \thigh-end applications when the integrity and the quality of the part is the main objective in the production process, rather than time and cost.\r\n\r\n\r\n\r\n\r\n\r\nGET DIFFERENCE BETWEEN CAST AND FORGED IRONS INFORMATION<\/strong><\/a>\r\n\r\n\r\n\r\n\r\nAdvantages and Disadvantages of Forged Valves\r\n\r\n\r\n\r\n\r\nThere are many reasons why you may want a forged ball valve for your application instead of a cast valve. Forged valves do tend to be better for high-temperature and high-pressure applications. These types of valves are less prone to thermal fatigue because the walls are thinner compared to cast alternatives. Also, forged options have a higher mass, making them mechanically stronger.\r\n\r\n\r\n\r\n\r\n\r\nHowever, there are a few reasons why a forged ball valve may not be best for your application. First, the forging process does create limitations for valve size and shape. Forging generally works better for smaller valves and components. In addition, not every metal is suitable for forging, which limits your options for valve material.\r\n\r\n\r\n\r\n\r\nAdvantages and Disadvantages of Cast Valves\r\n\r\n\r\n\r\n\r\nCast valves are a great option where you need quick turnaround and low-cost valves, as they require less labor to produce. Also, the casting process allows for more complex shapes and valve manufacturing. You also have greater flexibility in material choice, as many types of metals are suitable for casting.\r\n\r\n\r\n\r\n\r\n\r\nWhile cast valves are quite strong and durable when you choose a high-quality manufacturer, there are still some restrictions. For example, the solidification process can create small impurities in the metal. They also are less resistant to high temperatures and pressures compared to a forged ball valve.\r\n\r\n","parent":0,"count":7,"filter":"raw"},{"term_id":3,"name":"gate valve","slug":"gate-valve","term_group":0,"term_taxonomy_id":3,"taxonomy":"post_tag","description":"","parent":0,"count":41,"filter":"raw"}],"taxonomy_info":{"category":[{"value":1928,"label":"Gate Valve"}],"post_tag":[{"value":2176,"label":"cast steel gate valve"},{"value":3268,"label":"Difference Between Cast and Forged"},{"value":3,"label":"gate valve"}]},"yoast_head":"\n