Seeking advice on valve symbols

2017-06-17 View Original

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On the PID diagram, what is the difference between the valves represented by XV and AV?

Reply #2 2017-06-17

XV switch valve. Control the valve to open or close fully. Commands can be given manually, or via interlock circuits. Generally, there are only an open position and a closed position. AV electric valve

Reply #3 2017-06-17

XV is a two-valve device; I’ve never seen AV

Reply #4 2017-06-17

XV is a cut-off valve, AV is an analysis valve

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Seeking advice on valve symbols

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