Nous rencontrerons in\u00e9vitablement quelques \u00e9checs lors de l\u2019utilisation du robinet-vanne en acier moul\u00e9. Comment faire face \u00e0 ces \u00e9checs ? Aujourd'hui, nous pr\u00e9senterons les solutions pour r\u00e9soudre les d\u00e9fauts du robinet-vanne en acier moul\u00e9.<\/p>\n\n\n\n\n\n
La fissuration (ou d\u00e9formation du fond) des robinets-vannes en acier moul\u00e9 appara\u00eet principalement dans les produits \u00e0 structure \u00e0 plaques parall\u00e8les Z944\/Z964. Cela se produit lorsque le bas de la plaque de vanne du robinet-vanne en acier moul\u00e9 touche directement le corps de la vanne. En outre, il est tr\u00e8s facile de se produire lorsque la course de fermeture n'est pas r\u00e9gl\u00e9e ou que la limite \u00e9choue en raison d'une mauvaise mise en service de l'\u00e9lectrovanne.<\/p>\n\n\n\n
Les fissures sur la surface d'\u00e9tanch\u00e9it\u00e9 se produisent principalement dans les vannes en acier moul\u00e9 en acier alli\u00e9, qui sont souvent caus\u00e9es par des processus d\u00e9raisonnables. Une s\u00e9lection raisonnable des mat\u00e9riaux et un contr\u00f4le raisonnable des param\u00e8tres du processus de soudage peuvent \u00e9viter cela.<\/p>\n\n\n\n
Le bourrage du robinet-vanne en acier moul\u00e9 montre que le robinet est coinc\u00e9 du c\u00f4t\u00e9 du rail de guidage de la cavit\u00e9 centrale du corps de la vanne, ou m\u00eame s\u00e9par\u00e9 de la tige de la vanne. Cela est principalement d\u00fb \u00e0 une conception et une fabrication m\u00e9diocres, telles qu'une taille inappropri\u00e9e de la largeur de contact du rail de guidage et une surface rugueuse du rail de guidage.<\/p>\n\n\n\n
Lorsque la vanne est coinc\u00e9e dans le si\u00e8ge du robinet-vanne en acier moul\u00e9 et que la tige de la vanne est soulev\u00e9e de force, la rainure en forme de T de la vanne se brise ou se d\u00e9forme souvent pour \u00e9viter le facteur \u00ab boost anormal \u00bb. La diff\u00e9rence de temp\u00e9rature et la force de fermeture sont deux raisons majeures auxquelles il convient de pr\u00eater attention.<\/p>\n\n\n\n
Il existe une condition de fonctionnement typique de diff\u00e9rence de temp\u00e9rature. Si les vannes en acier moul\u00e9 sont ferm\u00e9es \u00e0 froid puis ouvertes \u00e0 chaud, le couple de fermeture de la vanne augmentera, ce qui entra\u00eenera le coincement de la vanne en raison de la dilatation thermique et de l'allongement de la tige de la vanne.<\/p>\n\n\n\n
Si l'\u00e9tat chaud est ferm\u00e9 et l'\u00e9tat froid est ouvert, la largeur de l'entrejambe deviendra plus grande en raison de la d\u00e9formation thermique des si\u00e8ges de soupape des deux c\u00f4t\u00e9s. L\u2019\u00e9tat froid les fera r\u00e9tr\u00e9cir et devenir plus petits, ce qui entra\u00eenera un coincement du portail. Si les deux \u00e9tats ci-dessus sont accompagn\u00e9s d\u2019une \u00ab force de fermeture \u00bb serr\u00e9e. Si l'entra\u00eenement \u00e9lectrique n'est pas correctement r\u00e9gl\u00e9 ou si le m\u00e9canisme de surpression tel qu'une cl\u00e9 ou un levier est mal utilis\u00e9, il existe un risque accru de coincement de l'obturateur du robinet-vanne en acier moul\u00e9.<\/p>\n\n\n\n
ZECO dispose d'un syst\u00e8me complet de gestion de la qualit\u00e9 des produits. Il a pass\u00e9 des certifications telles que API6D, CE\/PED, ISO9001, IS014001, ISO18001, WRAS, FM et TS. En outre, il a \u00e9t\u00e9 reconnu par les soci\u00e9t\u00e9s p\u00e9troli\u00e8res et gazi\u00e8res. ZEC0 entretient une coop\u00e9ration \u00e0 long terme avec China National Chemical Equipment (CNCE) et la China Petroleum & Chemical Engineering Survey and Design Association (CPCESDA).<\/p>\n\n\n\n
ZECO a d\u00e9velopp\u00e9 son laboratoire pour la R&D sur l'innovation et la validation de la conception de vannes aux normes internationales, y compris les tests PT, MTUT et FE. Si vous en avez besoin, n'h\u00e9sitez pas \u00e0 nous consulter.<\/p>\n\n\n\n\n
Nous rencontrerons in\u00e9vitablement quelques \u00e9checs lors de l\u2019utilisation du robinet-vanne en acier moul\u00e9. Comment devrions-nous g\u00e9rer cela\u2026 Lire plus<\/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\/fr\/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