02092nmc a2200313 4500 20260608201323.0 260224s2001 xxu ing Inglés Liquid levels and density Case histories with DP cell problems Texas The Distillation Group 2001 2009-05-18 ; 12/01/2004 Publicado en el sitio web de The Distillation Group(http://www.distillationgroup.com), donde pueden consultarse otros artículos sobre temas relacionados. ; Página visitada en enero de 2004. ; Navegadores de Internet Transcripción del resumen presentado por el autor, en inglés Differential pressure (DP) cells are the most often used level measuring device in the process industries. Differential pressure cells measure the pressure difference between two points and send a differential pressure reading to the plant control system. Typically, DP cells are rated in inches of water equivalent. Standard ranges include 0 to 20, 0 to 50, 0 to 100, 0 to 200, and 0 to 500 inches of water differential pressure. The control system converts the DP cell reading into a liquid level based on an assumed specific gravity inside the vessel. Levels based on DP cells can err for different reasons. Previous columns have covered many reasons DP cells or sight glasses can give false readings. This column covers some case histories of specific DP cell problems ARCHIVO The Distillation Group 26172 Tratamiento de gas natural 382 Tratamiento de gases licuados 381 Fraccionamiento 7267 Torres de enfriamiento 6894 Torres fraccionadoras 99 Procesos criogénicos 3008 Deetanización 1262 Recuperación de gases licuados 6399 Diagrama de flujos 23701 Condiciones operativas 25313 The Distillation Group 26172 153589 153589 http://www.distillationgroup.com/technical/p095.htm 0 0 0 0 221408 BVIAPG BVIAPG 2026-03-05 200029738 0 200029738 2026-03-05 00:34:48 2026-03-05 INTERNET