Is there such a thing as a faulty open or faulty closed state for electric valves? ? ?
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Is there such a thing as a faulty open or faulty closed state for electric valves? ? ? If it exists, for example in the case of a fault such as a power loss, can it be set to fault on or fault off? ?
It seems there are no electric valves; solenoid valves are available instead
No! ! ! The actuator of an electric valve switch is the motor, which enables opening and closing by rotating in forward and reverse directions.
Don’t all electric valves have manual actuators?
Electric valves cannot operate without power; they usually have their own power supply of 220V or 380V. If there is no power, they can only be opened or closed manually. The fault point, switch status point, and switch command point are all 4-20ma signal values.