1.Question:What is the working principle of electro-hydraulic linkage ball valve
Answer:1. Remote control:
1) Single acting FC (or FO): By sending an open (or close) signal to the electromagnetic directional valve, the valve can be opened (or closed). When the system encounters an emergency state such as power loss or signal loss, there is no need to point out
In the event of a power outage, the solenoid valve will reverse direction, and the spring in the actuator will quickly reset and automatically close (or open) the valve. 2) Intelligent valve regulation control: In working conditions where valve opening and stage speed are required to be regulated, the actuator is equipped with servo proportional valves, displacement sensors, and PLCs, operating at 4-20mA
Under the control signal, the actuator's 0 ° to 90 ° stroke positioning can be adjusted.
Note: This electro-hydraulic actuator is a closed-loop control system that can set the following parameters on the actuator body: valve opening/closing speed, hydraulic system working pressure, and self-protection
Delay alarm time of protective device, etc.
2. Local control cabinet operation:
The control cabinet panel is equipped with emergency local operation buttons, valve position indicator lights, valve fault alarm lights, and emergency shut-off switches.
The valve position indicator light displays the current status of the valve. If the valve open light is on, it indicates that the valve is in the open state. Similarly, if the valve close light is on, the valve is currently in the closed state.
Valve position fault light: indicates that the valve is stuck or the hydraulic system is malfunctioning and requires maintenance.
Emergency cut-off switch: Pressing this switch will automatically cut off the power supply of the control cabinet, causing the system to stop working instantly. At this point, the actuator is reset under the action of the spring.
