The function of the solenoid valve on the control valve
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Each control valve is equipped with a low-power solenoid valve; what is the function of this solenoid valve?
In simple terms, it involves using control signals to open or close solenoid valves, thereby opening or closing the gas path; are the valves all regulated by gas?
Based on the signals sent by the central control unit, the gas circuit is switched between powered and unpowered states to operate the valve on and off! ! !
Strictly speaking, that is called an electromagnetic directional control valve, and it is used to change the direction of the air flow.
In most cases, rapid exhaust from within the actuator diaphragm is achieved through air path switching, and the interlocked operation of the valve is accomplished by utilizing the actuator’s fail-safe positions FO/FC
I quite agree with what was said above, but I would like to add my own perspective as well: in the event of an accident that results in the valve losing control, such as when a regulator fails and can no longer be used, it is necessary to cut off the gas supply urgently in order to close or open the valve
It is mainly for safety purposes; an electromagnetic valve is added specifically to prevent failures of the locator. To control the intake air source.
By switching the gas path and controlling the air intake direction, the interlocking operation of the valves is achieved, ensuring that the valves are in the safe positions FO or FC in the event of a fault.
Generally, an interlocked control valve requires a solenoid valve; when the interlock is activated, the solenoid valve becomes energized, allowing the control valve to operate. When the solenoid valve loses power, the control valve remains in either the open or closed position.
For example, it’s like a relay: when voltage is applied to the relay, the normally open contacts turn into closed contacts, and the normally closed contacts turn into normally open contacts. The solenoid valve works in the same way
It should be a chain reaction. But why does every valve need to be interlocked? ? ?