{"id":6695,"date":"2011-08-24T13:36:59","date_gmt":"2011-08-24T18:36:59","guid":{"rendered":"https:\/\/www.parrinst.com\/?page_id=6695"},"modified":"2020-12-14T11:05:23","modified_gmt":"2020-12-14T17:05:23","slug":"apparatus-for-vapor-pressure-determination","status":"publish","type":"page","link":"https:\/\/www.parrinst.com\/es\/products\/specialty-custom-systems\/apparatus-for-vapor-pressure-determination\/","title":{"rendered":"Aparatos para Determinaci\u00f3n de Presi\u00f3n de Vapor"},"content":{"rendered":"
\"Aparatos<\/a>
Figure 1
Aparatos para Determinaci\u00f3n de Presi\u00f3n de Vapor <\/strong><\/figcaption><\/figure>\n

Una prueba de fugas com\u00fan para recipientes a presi\u00f3n Parr consiste en llenar un recipiente con nitr\u00f3geno a 300 K hasta 50 bar seguido por calentamiento a 600 K. De acuerdo con la ley del gas ideal, al duplicar la temperatura absoluta se debe duplicar la presi\u00f3n hasta 100 bar. Incluso cuando se consideran los cambios en la compresibilidad del gas esta presi\u00f3n objetivo te\u00f3rica rara vez se logra. Cuando el recipiente se enfr\u00eda de nuevo a 300 K, una presi\u00f3n de 50 bares indica que el dep\u00f3sito est\u00e1 libre de fugas en este intervalo de temperaturas. La presi\u00f3n observada a 600 K es siempre inferior a 100 bar. Esto es debido a que la presi\u00f3n resultante es indicativa de la temperatura media del recipiente. Esta temperatura media es generalmente inferior a la temperatura indicada por un punto de medici\u00f3n de temperatura \u00fanico cerca del fondo del recipiente. Esta \u00e1rea activamente calentada es t\u00edpicamente el punto m\u00e1s caliente en el sistema. Los recipientes m\u00e1s peque\u00f1os exhiben t\u00edpicamente las desviaciones mayores de presi\u00f3n debido a la proporci\u00f3n m\u00e1s grande de calentamiento en la superficie calentada.<\/p>\n

Una prueba similar, calentando un recipiente medio lleno de agua, tambi\u00e9n, en general muestra una desviaci\u00f3n similar de la presi\u00f3n de saturaci\u00f3n publicada a una temperatura determinada, debido a los mismos gradientes de temperatura que resultan de la forma en que se calienta el recipiente. Una vez m\u00e1s, generalmente los recipientes m\u00e1s peque\u00f1os muestran desviaciones m\u00e1s grandes debido a que la temperatura promedio del recipiente puede ser sensiblemente menor que la temperatura indicada por el sensor de temperatura del punto \u00fanico de l\u00edquido.<\/p>\n

\"Process<\/a>
Figure 2
Process and Instrumentation Diagram for the Vapor Pressure Apparatus<\/strong><\/figcaption><\/figure>\n
\"CAD<\/a>
Figure 3<\/p>\n

CAD Model for the Vapor Pressure CAD Model for the Vapor Pressure Apparatus<\/strong><\/figcaption><\/figure>\n

La imagen ilustra un sistema de doble recipiente personalizado para la determinaci\u00f3n exacta de la presi\u00f3n de saturaci\u00f3n de materiales org\u00e1nicos especializados como una funci\u00f3n detemperatura. Todos los accesorios asociados a la cabeza, v\u00e1lvulas y tuber\u00edas, incluidos los transductores de presi\u00f3n, est\u00e1n encerrados en un bloque de aluminio calentado a temperatura controlada, para minimizar los gradientes de temperatura y para asegurar que la temperatura promedio del sistema se aproxime a la temperatura de los recipientes, incluyendo sus cierres de tornillo, encerrados en el bloque de menor temperatura controlada. La foto muestra las v\u00e1lvulas y accesorios expuestos, los cuales est\u00e1n cubiertos por una placa de aluminio durante el funcionamiento normal del sistema.<\/p>\n","protected":false},"excerpt":{"rendered":"

Una prueba de fugas com\u00fan para recipientes a presi\u00f3n Parr consiste en llenar un recipiente con nitr\u00f3geno a 300 K hasta 50 bar seguido por calentamiento a 600 K. De acuerdo con la ley del gas ideal, al duplicar la temperatura absoluta se debe duplicar la presi\u00f3n hasta 100 bar. Incluso cuando se consideran los […]<\/p>\n","protected":false},"author":2,"featured_media":36941,"parent":81,"menu_order":90,"comment_status":"closed","ping_status":"closed","template":"product-narrow.php","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-6695","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nAparatos para Determinaci\u00f3n de Presi\u00f3n de Vapor - Parr Instrument (Espa\u00f1ol)<\/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:\/\/www.parrinst.com\/es\/products\/specialty-custom-systems\/apparatus-for-vapor-pressure-determination\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Aparatos para Determinaci\u00f3n de Presi\u00f3n de Vapor - Parr Instrument (Espa\u00f1ol)\" \/>\n<meta property=\"og:description\" content=\"Una prueba de fugas com\u00fan para recipientes a presi\u00f3n Parr consiste en llenar un recipiente con nitr\u00f3geno a 300 K hasta 50 bar seguido por calentamiento a 600 K. De acuerdo con la ley del gas ideal, al duplicar la temperatura absoluta se debe duplicar la presi\u00f3n hasta 100 bar. 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