Issues with piping instrumentation and flow diagrams
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As shown in the figure, why are the level gauge and the flow meter always drawn together in the area I have marked with a yellow circle? If it is to control the liquid level, isn’t it sufficient to use just an FIC transmitter? The FIC transmitter receives signals to control the opening degree of the valve, thereby regulating the flow rate and maintaining the liquid level. Why is there still an FT table? ?
This should be cascade control: one main loop and one secondary loop, with the possibility to switch between them
This should be cascade control: one main loop and one secondary loop, with the possibility to switch between them
This should be cascade control: one main loop and one secondary loop, with the possibility to switch between them
This is a cascade control loop; the primary loop is related to liquid level, while the secondary loop is related to flow rate. FT should be the local secondary meter, and the FIC marked with a box represents the DCS control system