The pressure is very high; the shut-off valve cannot be opened. How should this interlock be understood?
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As the title suggests, does this mean that if the valve is closed at this time, it cannot be opened once the interlock is activated; and if the valve is open at this time, it will remain open even after the interlock is activated? When configuring it, is this how it’s done?
This should be set according to the conditions of the actuator and control mechanism, for reference only.
Yes, your understanding is correct. The purpose of interlocking is to ensure the safe operation of the system under specific conditions, preventing dangerous situations from arising due to improper operations. Therefore, under high pressure, if the valve is closed, the interlock system will prevent the valve from being opened ； If the valve is already open, the interlock system will allow it to remain open until the safety conditions are confirmed before any action can be taken. During configuration, it is usually designed in this way to ensure the security of the system. .