{"id":1884,"count":8,"description":"\r\n\r\n\r\n\r\nOBTENIR DES INFORMATIONS SUR LES VANNES WIKIPEDIA<\/strong><\/a>\r\n\r\n\r\n\r\n\r\n

Construction de vannes \u00e0 vanne<\/h2>\r\n\r\n\r\n\r\n\r\nCommon gate valves are actuated by a threaded stem that connects the actuator (e.g. handwheel or motor) to the gate. They are characterized as having either a rising or a non-rising stem, depending on which end of the stem is threaded. Rising stems are fixed to the gate and rise and lower together as the valve is operated, providing a visual indication of valve position. The actuator is attached to a nut that is rotated around the threaded stem to move it. Non rising stem valves are fixed to, and rotate with, the actuator, and are threaded into the gate. They may have a pointer threaded onto the stem to indicate valve position since the gate's motion is concealed inside the valve. Non rising stems are used where vertical space is limited.\r\n\r\n\r\n\r\n\r\n\r\nLes vannes peuvent \u00eatre actionn\u00e9es manuellement (volant) ou \u00e9lectriquement \u00e0 l'aide d'un moteur \u00e0 couple \u00e9lev\u00e9.\r\n\r\n\r\n\r\n\r\n\r\nLe portail coulissant (disque) peut \u00eatre en forme de coin (conique) ou parall\u00e8le. Les conceptions en forme de coin comprennent des conceptions en forme de coin solides, flexibles et fendues.\r\n\r\n\r\n\r\n\r\n\r\nLes anneaux de si\u00e8ge sont utilis\u00e9s pour faciliter le remplacement d'un si\u00e8ge us\u00e9 ou qui fuit. Les anneaux de si\u00e8ge ont un filetage sur l'envers qui peut \u00eatre viss\u00e9 dans le corps principal de la vanne, la surface plane sur le c\u00f4t\u00e9 oppos\u00e9 est la surface d'appui qui appuie contre le disque. Si les bagues de si\u00e8ge ne sont pas utilis\u00e9es, il est possible d'usiner un si\u00e8ge plat sur le corps de vanne principal lui-m\u00eame, malheureusement, cela rend impossible le remplacement du si\u00e8ge et le si\u00e8ge ne peut \u00eatre usin\u00e9 que quelques fois avant de devoir remplacer la vanne enti\u00e8re.\r\n\r\n\r\n\r\n\r\n\r\nLes chapeaux de robinets-vannes sont souvent construits en fonte. La fonte est fragile, ce qui rend le capot sujet aux fissures. Des pr\u00e9cautions particuli\u00e8res doivent \u00eatre prises lors de la manipulation et de l'entretien des vannes \u00e0 chapeau en fonte.\r\n\r\n\r\n\r\n\r\n\r\nLorsque la tige p\u00e9n\u00e8tre \u00e0 travers le chapeau de la vanne, il est n\u00e9cessaire d'installer un presse-\u00e9toupe pour emp\u00eacher toute fuite par l'espace entre la tige et le chapeau\u00a0; l'\u00e9tanch\u00e9it\u00e9 est g\u00e9n\u00e9ralement r\u00e9alis\u00e9e \u00e0 l'aide du mat\u00e9riau d'emballage fibreux.\r\n\r\n\r\n\r\n\r\n\r\nDes brides sont install\u00e9es du c\u00f4t\u00e9 aspiration et refoulement de la vanne afin que la tuyauterie puisse \u00eatre facilement connect\u00e9e.\r\n\r\n\r\n\r\n\r\n

Types de vannes \u00e0 vanne<\/h2>\r\n\r\n\r\n\r\n\r\nLa porte est disponible dans diff\u00e9rentes conceptions et technologies pour produire une \u00e9tanch\u00e9it\u00e9 efficace pour diff\u00e9rentes applications.\r\n\r\n\r\n\r\n\r\n\r\nVanne \u00e0 guillotine\r\n\r\n\r\n\r\n\r\n\r\nUne vanne \u00e0 guillotine est utilis\u00e9e pour les fluides \u00e9pais et les solides secs en vrac. La porte n\u2019est constitu\u00e9e que d\u2019une seule pi\u00e8ce de m\u00e9tal, g\u00e9n\u00e9ralement pointue comme un couteau. Ces vannes sont autonettoyantes car elles passent devant les anneaux de si\u00e8ge \u00e0 chaque ouverture et fermeture.\r\n\r\n\r\n\r\n\r\n

Vanne \u00e0 coin<\/h3>\r\n\r\n\r\n\r\n\r\nA wedge gate valve has a gate in the shape of a wedge that sits on two inclined seats. In addition to the primary force created by fluid pressure, a high wedging force on the seats created by the stem tightening assists with the sealing. The wedge-shaped gate does not stick to the seat in case of high fluid differential pressure and has an increased service life due to less \"rubbing\" on the seats. However, wedge-shaped gate valves have an additional compression load on the seats that may result in thermal binding and restricted valve opening due to expansion.\r\n\r\n\r\n\r\n\r\n

Vanne \u00e0 glissi\u00e8re parall\u00e8le<\/h3>\r\n\r\n\r\n\r\n\r\nUne vanne \u00e0 tiroir parall\u00e8le a une porte plate et des si\u00e8ges parall\u00e8les \u00e0 celle-ci. Les vannes \u00e0 guillotine parall\u00e8le utilisent la pression et le positionnement de la conduite pour assurer une \u00e9tanch\u00e9it\u00e9 parfaite. Les portails plats sont constitu\u00e9s de deux pi\u00e8ces et comportent un ressort au milieu. Le ressort pousse les pi\u00e8ces vers les si\u00e8ges pour une meilleure \u00e9tanch\u00e9it\u00e9. En raison de leur conception inh\u00e9rente, les vannes \u00e0 vanne parall\u00e8le pr\u00e9sentent un avantage en mati\u00e8re de s\u00e9curit\u00e9 dans les applications \u00e0 haute temp\u00e9rature. De plus, comme il n'y a pas d'action de coincement dans les portails parall\u00e8les, les couples de fermeture sont comparativement plus faibles, ce qui se traduit par des actionneurs plus petits et moins co\u00fbteux ou par un effort manuel moindre. Gr\u00e2ce \u00e0 leur position coulissante, les portes parall\u00e8les \u00e9loignent la salet\u00e9 des surfaces d'assise.\r\n\r\n\r\n\r\n\r\n

Robinet-vanne de dalle<\/h3>\r\n\r\n\r\n\r\n\r\nLes vannes \u00e0 dalle, \u00e9galement appel\u00e9es vannes \u00e0 passage traversant, sont des vannes monobloc qui comprennent un trou de la taille d'un al\u00e9sage. L'al\u00e9sage est dans l'alignement des bagues \u00e0 deux si\u00e8ges \u00e0 l'\u00e9tat ouvert. Cet alignement cr\u00e9e un \u00e9coulement fluide avec un minimum de turbulences. Cette conception unique permet une perte de pression minimale dans le syst\u00e8me et est parfaite pour le transport de p\u00e9trole brut et de liquides de gaz naturel (LGN). Les si\u00e8ges de soupape restent propres. Cependant, la cavit\u00e9 du disque peut capturer des corps \u00e9trangers. Par cons\u00e9quent, la cavit\u00e9 comporte g\u00e9n\u00e9ralement un bouchon int\u00e9gr\u00e9 \u00e0 des fins de maintenance pour drainer les mati\u00e8res \u00e9trang\u00e8res accumul\u00e9es.\r\n\r\n\r\n\r\n\r\n

Vanne \u00e0 vanne expansible parall\u00e8le<\/h3>\r\n\r\n\r\n\r\n\r\nExpanding gate valves have two slab gates matched together that provide sealing through the mechanical expansion of the gate, as seen in Figure 5. When lifted, both of the slab gate's cavities allow the media to flow. The upward force on one slab and the stoppage of the second slab, by a step in the valve body, allows for outward mechanical expansion for a proper seal. When closed, the slab gates block the media flow, and the downward force (stem) on one slab and upward force (step in valve body) allows for outward mechanical expansion for a proper seal.\r\n\r\n\r\n\r\n\r\n\r\nCes vannes assurent une \u00e9tanch\u00e9it\u00e9 efficace simultan\u00e9ment pour les si\u00e8ges amont et aval. Ce joint les rend id\u00e9aux pour des applications telles que les vannes d'isolement dans les centrales \u00e9lectriques, les vannes de sectionnement dans les syst\u00e8mes de traitement et les vannes haute temp\u00e9rature dans les raffineries.\r\n\r\n\r\n\r\n\r\n

Vannes \u00e0 si\u00e8ge m\u00e9tallique ou \u00e0 si\u00e8ge r\u00e9silient<\/h2>\r\n\r\n\r\n\r\n\r\nAvant l'introduction sur le march\u00e9 des robinets-vannes \u00e0 si\u00e8ge \u00e9lastique, les robinets-vannes dot\u00e9s d'une cale \u00e0 si\u00e8ge m\u00e9tallique \u00e9taient largement utilis\u00e9s. La conception \u00e0 coin conique et les dispositifs d'\u00e9tanch\u00e9it\u00e9 angulaires d'un coin \u00e0 si\u00e8ge m\u00e9tallique n\u00e9cessitent une d\u00e9pression dans le fond de la vanne pour assurer une fermeture \u00e9tanche. Ainsi, du sable et des cailloux sont incrust\u00e9s dans le forage. Le syst\u00e8me de canalisations ne sera jamais compl\u00e8tement exempt d'impuret\u00e9s, quel que soit le degr\u00e9 de rin\u00e7age du tuyau lors de l'installation ou de la r\u00e9paration. Ainsi, toute cale m\u00e9tallique finira par perdre sa capacit\u00e9 \u00e0 r\u00e9sister aux chutes.\r\n\r\n\r\n\r\n\r\n\r\nUn robinet-vanne \u00e0 si\u00e8ge r\u00e9silient a un fond de vanne simple permettant le libre passage du sable et des cailloux dans la vanne. Si des impuret\u00e9s passent lorsque la vanne se ferme, la surface en caoutchouc se refermera autour des impuret\u00e9s pendant que la vanne est ferm\u00e9e. Un compos\u00e9 de caoutchouc de haute qualit\u00e9 absorbe les impuret\u00e9s lorsque la vanne se ferme et les impuret\u00e9s seront \u00e9vacu\u00e9es lorsque la vanne est rouverte. La surface en caoutchouc retrouvera sa forme originale gr\u00e2ce \u00e0 un joint \u00e9tanche aux chutes.\r\n\r\n\r\n\r\n\r\n\r\nLa grande majorit\u00e9 des robinets-vannes sont \u00e0 si\u00e8ge \u00e9lastique, cependant, les robinets-vannes \u00e0 si\u00e8ge m\u00e9tallique sont toujours demand\u00e9s sur certains march\u00e9s, ils font donc toujours partie de notre gamme pour l'approvisionnement en eau et le traitement des eaux us\u00e9es.\r\n\r\n","link":"https:\/\/zecovalve.com\/fr\/tag\/gate-valve-wikipedia","name":"Vanne \u00e0 guillotine Wikip\u00e9dia","slug":"gate-valve-wikipedia","taxonomy":"post_tag","meta":[],"yoast_head":"\nGate Valve Wikipedia - Gate Valve Suppliers | 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\/fr\/tag\/gate-valve-wikipedia\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Gate Valve Wikipedia - Gate Valve Suppliers | ZECO Valve\" \/>\n<meta property=\"og:description\" content=\"GET GATE VALVE WIKIPEDIA INFORMATION Construction of Gate Valves Common gate valves are actuated by a threaded stem that connects the actuator (e.g. handwheel or motor) to the gate. They are characterized as having either a rising or a non-rising stem, depending on which end of the stem is threaded. Rising stems are fixed to the gate and rise and lower together as the valve is operated, providing a visual indication of valve position. The actuator is attached to a nut that is rotated around the threaded stem to move it. Non rising stem valves are fixed to, and rotate with, the actuator, and are threaded into the gate. They may have a pointer threaded onto the stem to indicate valve position since the gate’s motion is concealed inside the valve. Non rising stems are used where vertical space is limited. Gate valves can be actuated manually (handwheel) or electrically using a high torque motor. The sliding gate (disc) can be wedge-shaped (tapered) or parallel-shaped. Wedge shape designs include solid, flexible, and split wedge designs. Seat rings are used to make the replacement of a worn\/leaking seat easier. Seat rings have a screw thread on the reverse side which can be screwed into the main valve body, the flat surface on the opposite side is the seating surface area that presses against the disc. If seat rings are not used, it is possible to machine a flat seat on the main valve body itself, unfortunately, this makes replacing the seat impossible and the seat can only be machined a few times before the entire valve must be replaced. Gate valve bonnets are often constructed of cast iron. Cast iron is brittle and this makes the bonnet prone to cracking. Special care should be taken when handling and maintaining valves with cast iron bonnets. As the stem penetrates through the valve bonnet, it is necessary to install a sealing gland to prevent leakage from occurring through the gap between the stem and bonnet; sealing is usually achieved using the fibrous packing material. Flanges are installed on the suction and discharge side of the valve so that piping can be easily connected. Gate Valve Types The gate comes in various designs and technologies to produce effective sealing for differing applications. Knife gate valve A knife gate valve is used for thick fluids and dry bulk solids. The gate is only one piece of metal, which is typically pointed like a knife. These valves are self-cleaning as they pass the seat rings every time they open and close. Wedge Gate Valve A wedge gate valve has a gate in the shape of a wedge that sits on two inclined seats. In addition to the primary force created by fluid pressure, a high wedging force on the seats created by the stem tightening assists with the sealing. The wedge-shaped gate does not stick to the seat in case of high fluid differential pressure and has an increased service life due to less “rubbing” on the seats. However, wedge-shaped gate valves have an additional compression load on the seats that may result in thermal binding and restricted valve opening due to expansion. Parallel Slide Gate Valve A parallel slide gate valve has a flat gate and seats parallel to it. Parallel slide gate valves use line pressure and positioning to make a tight seal. Flat gates consist of two pieces and have a spring in the middle. The spring pushes the pieces towards the seats for enhanced sealing. Due to their inherent design, parallel gate valves have a safety advantage in higher-temperature applications. Furthermore, since there is no wedging action in parallel gates, closing torques are comparatively smaller, resulting in smaller, less expensive actuators or less manual effort. Due to their sliding into position, parallel gates keep dirt away from the seating surfaces. Slab Gate Valve Slab gates, also called through-conduit gate valves, are one-unit gates that include a bore-size hole. The bore is in line with the two-seat rings in the open state. This alignment creates a smooth flow with minimal turbulence. This unique design allows for minimal pressure loss in the system and is perfect for the transportation of crude oil and natural gas liquids (NGLs). The valve seats remain clean. However, the disc cavity can capture foreign material. Therefore, the cavity typically has a built-in plug for maintenance purposes of draining the accumulated foreign material. Parallel Expanding Gate Valve Expanding gate valves have two slab gates matched together that provide sealing through the mechanical expansion of the gate, as seen in Figure 5. When lifted, both of the slab gate’s cavities allow the media to flow. The upward force on one slab and the stoppage of the second slab, by a step in the valve body, allows for outward mechanical expansion for a proper seal. When closed, the slab gates block the media flow, and the downward force (stem) on one slab and upward force (step in valve body) allows for outward mechanical expansion for a proper seal. These valves provide an effective seal simultaneously for both upstream and downstream seats. This seal makes them ideal for applications like isolation valves in power plants, block valves in process systems, and high-temperature valves in refineries. Metal seated vs Resilient Seated Gate Valves Before the resilient seated gate valve was introduced to the market, gate valves with a metal seated wedge were widely used. The conical wedge design and angular sealing devices of a metal seated wedge require a depression in the valve bottom to ensure a tight closure. Herewith, sand and pebbles are embedded in the bore. The pipe system will never be completely free from impurities regardless of how thoroughly the pipe is flushed upon installation or repair. Thus, any metal wedge will eventually lose its ability to be drop-tight. A resilient seated gate valve has a plain valve bottom allowing free passage for sand and pebbles in the valve. If impurities pass as the valve closes, the rubber surface will close around the impurities while the valve is closed. A high-quality rubber compound absorbs the impurities as the valve closes, and the impurities will be flushed away when the valve is opened again. The rubber surface will regain its original shape by securing a drop-tight sealing. The vast majority of gate valves are resilient seated, however, metal seated gate valves are still requested in some markets, so they are still part of our range for water supply and wastewater treatment.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zecovalve.com\/fr\/tag\/gate-valve-wikipedia\" \/>\n<meta property=\"og:site_name\" content=\"ZECO Valve\" \/>\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\":\"fr-FR\"},{\"@type\":\"CollectionPage\",\"@id\":\"https:\/\/zecovalve.com\/tag\/gate-valve-wikipedia#webpage\",\"url\":\"https:\/\/zecovalve.com\/tag\/gate-valve-wikipedia\",\"name\":\"Gate Valve Wikipedia - Gate Valve Suppliers | ZECO Valve\",\"isPartOf\":{\"@id\":\"https:\/\/zecovalve.com\/#website\"},\"breadcrumb\":{\"@id\":\"https:\/\/zecovalve.com\/tag\/gate-valve-wikipedia#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/zecovalve.com\/tag\/gate-valve-wikipedia\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/zecovalve.com\/tag\/gate-valve-wikipedia#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\/tag\/gate-valve-wikipedia\",\"url\":\"https:\/\/zecovalve.com\/tag\/gate-valve-wikipedia\",\"name\":\"Gate Valve Wikipedia\"}}]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","_links":{"self":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/tags\/1884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/zecovalve.com\/fr\/wp-json\/wp\/v2\/posts?tags=1884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}