{"id":3671,"count":8,"description":"\r\n\r\nOBTENER INFORMACI\u00d3N SOBRE EL SENTIDO DE FLUJO DE LAS V\u00c1LVULAS DE GLOBO<\/strong><\/a>\r\n\r\n\r\n\r\n\r\n\r\n\r\n

V\u00e1lvula de paso recto Sentido de circulaci\u00f3n<\/h2>\r\n\r\n\r\n\r\n\r\nV\u00e1lvulas de globo<\/a> se han convertido en una de las v\u00e1lvulas m\u00e1s utilizadas en empresas de casi todos los sectores. Y con su capacidad para iniciar, detener y estrangular el flujo de fluidos dentro de una tuber\u00eda, es f\u00e1cil ver por qu\u00e9.\r\n\r\n\r\n\r\n\r\n\r\nGenerally speaking, the flow of globe vales is from down to up. It means the medium will go through from the disc downside and then out by the upside. Globe valves usually adopt a compulsory sealed design, so closing the valve offer pressure to the disc against the seat. So if you want to open the valve, the globe valve disc must overcome resistance made by stem and packing friction, medium pressure will offer adverse pressure which helps open the valve. It means you can use less force than the closing valve. So the stem diameter should be larger, to avoid stem bending fault. (depending on the metal material's physical performance of the stem ). In recent years, there are more and more valve pressure seals, the medium through the upper disc to the down disc, so the close valve force is smaller than the open valve force, valve shaft diameter is allowed to be smaller.\r\n\r\n\r\n\r\n\r\n\r\nPero algunas opiniones no est\u00e1n de acuerdo con ella, especialmente para una v\u00e1lvula de globo con un tama\u00f1o m\u00e1s grande (por ejemplo, un tama\u00f1o mayor que DN250), la v\u00e1lvula de globo suele adoptar un sello de presi\u00f3n de la v\u00e1lvula, y teniendo en cuenta la fuerza de cierre de la v\u00e1lvula, es f\u00e1cil alcanzar el rendimiento de sellado. Pero debe tener en cuenta la estabilizaci\u00f3n de la v\u00e1lvula cuando el di\u00e1metro del v\u00e1stago de la v\u00e1lvula es menor que el di\u00e1metro del asiento.\r\n\r\n\r\n\r\n\r\n\r\nPero, \u00bfc\u00f3mo funcionan exactamente estas v\u00e1lvulas y cu\u00e1l es el flujo de direcci\u00f3n de la v\u00e1lvula de globo?\r\n\r\n\r\n\r\n\r\n

\u00bfC\u00f3mo funcionan las v\u00e1lvulas de globo?<\/h2>\r\n\r\n\r\n\r\n\r\nUna v\u00e1lvula de globo est\u00e1 dise\u00f1ada principalmente para detener, arrancar y regular el caudal. Se compone de un disco m\u00f3vil y un asiento anular fijo en un cuerpo generalmente esf\u00e9rico. El asiento de una v\u00e1lvula de globo est\u00e1 en el centro de la tuber\u00eda y paralelo a ella, y la abertura del asiento se cierra con el disco. Al girar la maneta, manualmente o mediante un actuador, el disco desciende o se eleva por medio del v\u00e1stago de la v\u00e1lvula. Cuando el disco est\u00e1 completamente bajado, se cierra el paso del fluido. Cuando el disco est\u00e1 totalmente elevado, el caudal de fluido es m\u00e1ximo. Cuando el disco se eleva a un nivel inferior al m\u00e1ximo, el caudal de fluido se regula proporcionalmente al recorrido vertical del disco.\r\n\r\n\r\n\r\n\r\n

V\u00e1lvula de globo Sentido de circulaci\u00f3n<\/strong><\/h2>\r\n\r\n\r\n\r\n\r\n-Para aplicaciones de baja temperatura, las v\u00e1lvulas de globo y de \u00e1ngulo se instalan normalmente de forma que la presi\u00f3n quede por debajo del disco. Esto facilita la operaci\u00f3n, ayuda a proteger la empaquetadura y elimina cierta acci\u00f3n erosiva en las caras del asiento y del disco.\r\n\r\n\r\n\r\n\r\n\r\n-Para el servicio de vapor a alta temperatura, las v\u00e1lvulas de globo se instalan de forma que la presi\u00f3n est\u00e9 por encima del disco. De lo contrario, el v\u00e1stago se contraer\u00e1 al enfriarse y tender\u00e1 a levantar el disco del asiento ( y a producirse fugas).\r\n\r\n\r\n\r\n\r\n

Flujo de apertura (FTO)<\/h3>\r\n\r\n\r\n\r\n\r\nAlso referred to as standard or forward flow, or in globe valves, flow under the seat. Think about when you've controlled the flow of water from a garden hose with your thumb. Your thumb acts like the face of the plug in a globe valve - flow is pushing against your thumb to open a flow path for the water.\r\n\r\n\r\n\r\n\r\n

Flujo hasta el cierre (FTC)<\/h3>\r\n\r\n\r\n\r\n\r\nTambi\u00e9n se denomina flujo inverso o, en las v\u00e1lvulas de globo, flujo sobre el asiento. Piense en el tap\u00f3n de desag\u00fce de una ba\u00f1era. La direcci\u00f3n del flujo es contraria a la parte posterior o superior del tap\u00f3n (en lugar de la cara), lo que crea una tendencia a que el tap\u00f3n se cierre en el desag\u00fce.\r\n\r\n\r\n\r\n\r\n
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