Valve issues in the process flow diagram
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In the PID diagram, how can one distinguish between the code for the interlock cut-off valve and the code for the interlock control valve? Are the legends for the two types of valves different?
This post was last edited by shuker666 on 2019-6-11 15:26. The shut-off valve is a two-position switch that serves to open (allowing the flow to proceed) and shut off (halting the flow of material)； The control valve serves to shut off and regulate the amount of material ；