Single-loop control (i.e., a control loop with one input and one output) ... (There are some exceptions-fired heater controls often use burner pressure as a substitute for fuel gas flow to control ...

A change to the control valve output of a gas flow control PID will see an almost immediate change to the Process Variable. This PID loop will need a lower gain and higher integral setting (or higher ...

Deaerator Level Control. It is often possible to use a three- element controller for deaerator level control. Whereas the drum level controls use drum level, steam flow, and feedwater flow, the ...

November 15, 2008 (Vol. 28, No. 20) Embedding Methodology in the Control System of a Plant Increases Its Utility Biotech processes should be standardized as much as possible to produce optimum ...

Bronkhorst Cori-Tech has released a new model in its series of Coriolis mass flow meters and controllers for accurate measurement and control of very low flow rates: the mini Cori-Flow. This compact ...

• Case No. 1. Flow rate was 823 b/d, with 43% bs&w and GOR of 1,244 scf/bbl (Table 2). Fig. 2a shows the separator operating level before and after putting the feed control valve in service.

Fig. 6 shows the relationship between along-wellbore ratio of the pressure-drop for the multiphase flow and the pressure drop experienced by single-phase flow for different gas-liquid ratios.