{"id":1884,"count":8,"description":"<!-- wp:kadence\/tableofcontents {\"uniqueID\":\"_d2f005-e4\"} \/-->\r\n\r\n<!-- wp:generateblocks\/button-container {\"uniqueId\":\"6d8495a3\",\"isDynamic\":true,\"blockVersion\":2} -->\r\n<!-- wp:generateblocks\/button {\"uniqueId\":\"3d442e11\",\"hasUrl\":true,\"target\":true,\"backgroundColor\":\"#0366d6\",\"textColor\":\"#ffffff\",\"backgroundColorHover\":\"#222222\",\"textColorHover\":\"#ffffff\",\"paddingTop\":\"15\",\"paddingRight\":\"20\",\"paddingBottom\":\"15\",\"paddingLeft\":\"20\"} -->\r\n<a class=\"gb-button gb-button-3d442e11 gb-button-text\" href=\"mailto:commercial@zecovalve.com\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Erhalten Sie Wikipedia-Informationen zu Schiebern<\/strong><\/a>\r\n<!-- \/wp:generateblocks\/button -->\r\n<!-- \/wp:generateblocks\/button-container -->\r\n\r\n<!-- wp:heading -->\r\n<h2 id=\"h-construction-of-gate-valves\">Konstruktion von Schiebern<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\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<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nAbsperrschieber k\u00f6nnen manuell (Handrad) oder elektrisch mithilfe eines Motors mit hohem Drehmoment bet\u00e4tigt werden.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nDas Schiebetor (Scheibe) kann keilf\u00f6rmig (konisch) oder parallel geformt sein. Keilf\u00f6rmige Ausf\u00fchrungen umfassen feste, flexible und geteilte Keilausf\u00fchrungen.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nSitzringe werden verwendet, um den Austausch eines verschlissenen\/leckenden Sitzes zu erleichtern. Sitzringe haben auf der R\u00fcckseite ein Gewinde, das in den Hauptventilk\u00f6rper eingeschraubt werden kann. Die flache Oberfl\u00e4che auf der gegen\u00fcberliegenden Seite ist die Sitzfl\u00e4che, die gegen die Scheibe dr\u00fcckt. Wenn keine Sitzringe verwendet werden, ist es m\u00f6glich, einen flachen Sitz am Hauptventilk\u00f6rper selbst herzustellen. Dies macht den Austausch des Sitzes leider unm\u00f6glich und der Sitz kann nur einige Male hergestellt werden, bevor das gesamte Ventil ausgetauscht werden muss.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nVentildeckel werden h\u00e4ufig aus Gusseisen hergestellt. Gusseisen ist spr\u00f6de, wodurch der Deckel anf\u00e4llig f\u00fcr Risse ist. Bei der Handhabung und Wartung von Ventilen mit Gusseisendeckeln ist besondere Vorsicht geboten.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nDa der Schaft durch die Ventilhaube hindurchragt, ist der Einbau einer Stopfbuchse erforderlich, um ein Austreten von Fl\u00fcssigkeit durch den Spalt zwischen Schaft und Haube zu verhindern. Die Abdichtung erfolgt \u00fcblicherweise durch Verwendung eines faserigen Packungsmaterials.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nAn der Saug- und Druckseite des Ventils sind Flansche angebracht, so dass die Rohrleitungen problemlos angeschlossen werden k\u00f6nnen.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Schieberventiltypen<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nDas Tor ist in verschiedenen Ausf\u00fchrungen und Technologien erh\u00e4ltlich, um eine wirksame Abdichtung f\u00fcr unterschiedliche Anwendungen zu gew\u00e4hrleisten.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPlattenschieber\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEin Plattenschieber wird f\u00fcr dicke Fl\u00fcssigkeiten und trockene Sch\u00fcttg\u00fcter verwendet. Der Schieber besteht aus nur einem St\u00fcck Metall, das normalerweise spitz wie ein Messer ist. Diese Schieber sind selbstreinigend, da sie bei jedem \u00d6ffnen und Schlie\u00dfen an den Sitzringen vorbeilaufen.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Keilschieber<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\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<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Parallelschieber<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEin Parallelschieber hat einen flachen Schieber und parallel dazu sitzende Ventile. Parallelschieber verwenden Leitungsdruck und Positionierung, um eine dichte Abdichtung zu erzielen. Flachschieber bestehen aus zwei Teilen und haben in der Mitte eine Feder. Die Feder dr\u00fcckt die Teile in Richtung der Ventilsitze, um die Abdichtung zu verbessern. Aufgrund ihrer Konstruktion bieten Parallelschieber bei Anwendungen mit h\u00f6heren Temperaturen einen Sicherheitsvorteil. Da bei Parallelschiebern keine Keilwirkung auftritt, sind die Schlie\u00dfdrehmomente zudem vergleichsweise geringer, was zu kleineren, kosteng\u00fcnstigeren Antrieben oder weniger manuellem Aufwand f\u00fchrt. Da Parallelschieber in Position gleiten, halten sie Schmutz von den Ventilsitzfl\u00e4chen fern.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Plattenschieber<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nPlattenschieber, auch Durchgangsschieber genannt, sind einteilige Schieber mit einer Bohrung in Bohrungsgr\u00f6\u00dfe. Die Bohrung ist im ge\u00f6ffneten Zustand auf die beiden Sitzringe ausgerichtet. Diese Ausrichtung erzeugt einen gleichm\u00e4\u00dfigen Durchfluss mit minimalen Turbulenzen. Dieses einzigartige Design erm\u00f6glicht minimalen Druckverlust im System und ist perfekt f\u00fcr den Transport von Roh\u00f6l und Fl\u00fcssiggasen (NGLs) geeignet. Die Ventilsitze bleiben sauber. Allerdings kann sich im Scheibenhohlraum Fremdmaterial festsetzen. Daher verf\u00fcgt der Hohlraum normalerweise \u00fcber einen eingebauten Stopfen, der zu Wartungszwecken das angesammelte Fremdmaterial ablassen kann.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3>Parallel expandierendes Schieberventil<\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\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<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nDiese Ventile bieten gleichzeitig eine wirksame Abdichtung f\u00fcr vor- und nachgeschaltete Ventilsitze. Diese Abdichtung macht sie ideal f\u00fcr Anwendungen wie Absperrventile in Kraftwerken, Blockventile in Prozesssystemen und Hochtemperaturventile in Raffinerien.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading -->\r\n<h2>Absperrschieber mit Metallsitz vs. Schieber mit elastischem Sitz<\/h2>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nBevor der Schieber mit elastischem Sitz auf den Markt kam, waren Schieber mit metallischem Keil weit verbreitet. Die konische Keilkonstruktion und die eckigen Dichtungsvorrichtungen eines metallischen Keils erfordern eine Vertiefung im Ventilboden, um einen dichten Verschluss zu gew\u00e4hrleisten. Dadurch setzen sich Sand und Kieselsteine in der Bohrung fest. Das Rohrsystem wird nie v\u00f6llig frei von Verunreinigungen sein, egal wie gr\u00fcndlich das Rohr bei der Installation oder Reparatur gesp\u00fclt wird. Daher verliert jeder metallische Keil irgendwann seine F\u00e4higkeit, tropfendicht zu sein.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nEin Schieber mit elastischem Sitz hat einen glatten Ventilboden, der Sand und Kieseln freien Durchgang im Ventil erm\u00f6glicht. Wenn beim Schlie\u00dfen des Ventils Verunreinigungen hindurchdringen, schlie\u00dft sich die Gummioberfl\u00e4che um die Verunreinigungen, w\u00e4hrend das Ventil geschlossen ist. Eine hochwertige Gummimischung absorbiert die Verunreinigungen beim Schlie\u00dfen des Ventils und die Verunreinigungen werden weggesp\u00fclt, wenn das Ventil wieder ge\u00f6ffnet wird. Die Gummioberfl\u00e4che nimmt ihre urspr\u00fcngliche Form wieder an, indem sie eine tropfendichte Abdichtung gew\u00e4hrleistet.\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nDie \u00fcberwiegende Mehrheit der Schieber verf\u00fcgt \u00fcber einen elastischen Sitz. In einigen M\u00e4rkten werden jedoch weiterhin Schieber mit metallischem Sitz nachgefragt und sind daher weiterhin Teil unseres Sortiments f\u00fcr die Wasserversorgung und Abwasserbehandlung.\r\n\r\n<!-- \/wp:paragraph -->","link":"https:\/\/zecovalve.com\/de\/tag\/gate-valve-wikipedia","name":"Absperrschieber Wikipedia","slug":"gate-valve-wikipedia","taxonomy":"post_tag","meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Gate 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\/de\/tag\/gate-valve-wikipedia\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\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&#8217;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 &#8220;rubbing&#8221; 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&#8217;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\/de\/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\":\"de\"},{\"@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\":\"de\",\"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\/de\/wp-json\/wp\/v2\/tags\/1884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zecovalve.com\/de\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/zecovalve.com\/de\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/zecovalve.com\/de\/wp-json\/wp\/v2\/posts?tags=1884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}