Time：2025-04-27Views：2
The opening and closing operation methods and techniques of electric globe valves are as follows:
1、 Open operation
1. Preparation work
Check the power supply and wiring: Ensure that the power supply of the electric shut-off valve is normal and the voltage is stable within the rated range, usually AC220V or AC380V, etc. Check if the power cord connection is secure, free from looseness, damage, etc., and if the grounding is good.
Check valve status: Conduct a visual inspection of the valve to check for any damage, corrosion, deformation, or other issues with the valve body, stem, spool, and other components. Manually rotate the handwheel to check if the valve stem can rise and fall flexibly, if the valve core and seat are tightly matched, and if there is any jamming. At the same time, check for any signs of leakage at the inlet and outlet connections of the valve.
Confirm control signal: If the electric shut-off valve is connected to the control system, it is necessary to confirm that the control system has sent the correct opening signal and the signal transmission is normal. It can be determined by viewing the valve status display or indicator lights on the control interface.
2. Remote control enabled
Operation control system: Enter the valve control interface on the remote control terminal, find the corresponding icon or option for the electric shut-off valve, click the "open" button or enter the open command.
Monitor the opening process: closely monitor the valve status feedback in the control system, including parameters such as the stroke position of the valve stem and the working current of the motor. If there are abnormal valve stem travel or motor current, the opening operation should be stopped immediately and checked and handled.
3. On site manual opening
Switch to manual mode: When on-site manual opening is required, switch the control mode of the electric shut-off valve to manual mode. Usually, there are corresponding switching handles or buttons on electric actuators, which can be operated according to the operating instructions.
Manual valve operation: Use a specialized wrench or handwheel to slowly rotate the handwheel counterclockwise to drive the valve stem up, causing the valve core to leave the valve seat and open the valve. During the opening process, pay attention to feeling the resistance of the handwheel. If encountering significant resistance, stop the operation, check the cause and eliminate the fault before continuing.
2、 Close operation
1. Preparation work
Check valve status: Before closing, check the appearance and operating status of the valve again to ensure that it is normal, without leakage, abnormal vibration, or other conditions.
Confirm closing conditions: according to the process flow and actual demand, confirm whether the Pressure and flow of the medium in the pipeline meet the conditions for valve closing.
2. Remote control shutdown
Operation control system: Select the electric shut-off valve to be closed on the remote console, click the "Close" button or enter the corresponding closing command.
Monitoring the closing process: Pay close attention to parameters such as the gradual decrease in the stroke position of the valve stem to the closed position and the normal working current of the motor during the valve closing process. If there are abnormal situations such as valve failure or motor malfunction, the closing operation should be stopped in a timely manner and checked.
3. On site manual shutdown
Switch to manual mode: Switch the control mode of the electric shut-off valve to manual mode.
Manual valve operation: Use a wrench or handwheel to rotate the handwheel clockwise to lower the valve stem, causing the valve core to tightly press against the valve seat and close the valve. Ensure that the valve is fully closed and there is no leakage.
4. Operation skills
Slow operation: the electric stop valve shall be opened and closed slowly to avoid damage to valve parts, excessive Pressure fluctuation in the pipeline or water hammer caused by too fast operation.
Pay attention to feedback signals: Electric globe valves are generally equipped with feedback devices such as travel indicators and limit switches. When operating, pay close attention to these feedback signals to ensure that the actual position of the valve is consistent with the control signal.
Regular maintenance: Regularly maintain the electric globe valve, check the sealing performance of the valve, the operation of the electric actuator, etc., replace damaged components in a timely manner, and ensure the normal operation of the valve.
Emergency response: In case of sudden situations such as valve jamming or electric actuator failure during operation, the operation should be immediately stopped, the power should be cut off, corresponding emergency measures should be taken, such as manually adjusting the valve position, and professional personnel should be notified for maintenance in a timely manner.