What kind of valve is this?
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What kind of valve is this? Is it a gate valve?
It’s better to look at the legend; it’s not clear from this. But based on the legends of plug valves I’ve seen, it’s not like this
There should be annotations in the flowchart description
This looks more like a drawing of a positive-displacement pump
Positive displacement pumps are drawn in the same way; is it a diaphragm valve?
It might be a piston-type multi-functional control valve