Can the valve gas supply be shut off in winter?
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The unit is currently shut down, and there is no material in the pipelines. If the instrument air supply is cut off, will it cause damage to the valves? Will it affect their frost protection? If anyone has had similar experiences, please let me know.
No, the new valve can work fine even without being pressurized
Since there is no material in the pipeline and the instrument air supply is stopped, the valve returns to its original condition from the time of manufacture, and this does not cause any damage to the valve.
Cutting off the power source will not cause damage to the valve.