The control valves on the process flow diagram are not clearly identified; there is a diagram
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As shown in the figure, the first one is a pneumatic valve, and are the latter two electric valves? I’m asking experts to take a look: handshake
From the diagram, it appears that they are all pneumatic valves; it would be best to find the legend. If that’s not possible, then consult an instrumentation technician’s diagram handbook
Then why don’t the latter two have air supply signal wires?
I checked the instrument diagram manual; it seems to be a pneumatic valve, so why isn’t there any air supply signal wire?
The air source can be included or omitted; it’s normal for different styles to vary
Thank you, I understand. Also, there’s no need to draw it when omitting the pneumatic-electric signal converter
https://bbs.hcbbs.com/forum.php?mod=image&aid=2063821&size=300x300&key=dd3ad21ea29fe542&nocache=yes&type=fixnone Hello, could you please explain what this pneumatic control valve is? Are those wires and components on the valve just there randomly?
It’s the pipeline from the instrument air to the diaphragm head; there is an interlock, so the solenoid valve is also shown
So what does TY\IP mean, where does it come from, and what is its purpose?