TY  - DATA
ED  - The Distillation Group
ED  - The Distillation Group
TI  - Liquid levels and density: Case histories with DP cell problems
PY  - 2001///
CY  - Texas
PB  - The Distillation Group
KW  - Tratamiento de gas natural
KW  - Tratamiento de gases licuados
KW  - Fraccionamiento
KW  - Torres de enfriamiento
KW  - Torres fraccionadoras
KW  - Procesos criogénicos
KW  - Deetanización
KW  - Recuperación de gases licuados
KW  - Diagrama de flujos
KW  - Condiciones operativas
N1  - 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
N2  - 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
UR  - http://www.distillationgroup.com/technical/p095.htm
ER  -