Operation methods and precautions for electric valves

Before operating the valve, the operating instructions should be read carefully.
1. Be sure to know the flow direction of the gas before operation, and pay attention to check the valve opening and closing marks.
2. Check the appearance of the electric valve to see if it is damp. If it is damp, it must be dried. If other problems are found, they must be dealt with in time and must not be operated without faults.
3. For electric devices that have been out of use for more than 3 months, check the clutch before starting. After confirming that the handle is in the manual position, check the insulation, steering and electrical circuits of the motor.

1. When starting, confirm that the clutch handle is in the corresponding position.
2. If the electric valve is controlled in the control room, turn the transfer switch to the REMOTE position, and then control the switch of the electric valve through the SCADA system.
3. If controlled manually, turn the transfer switch to the LOCAL position and operate the switch of the electric valve locally. When the electric valve is opened or closed in place, it will automatically stop working, and then turn the operation switch to the middle position.
4. When using on-site operation of the valve, the valve opening and closing instructions and valve stem operation should be monitored, and the valve opening and closing degree must meet the requirements.
5. When using on-site operation to fully close the valve, before the valve is closed in place, the electric valve closing should be stopped and micro-movement should be used to close the valve in place.
6. For valves whose stroke and super-torque controllers have been adjusted, when fully opening or fully closing the valve, attention should be paid to monitoring the control of the stroke. If the valve does not stop when the valve switches to the position, it should be manually stopped immediately.
7. During the process of opening and closing the valve, if you find that the signal indicator light indicates incorrectly or the valve makes abnormal noise, you should stop the machine for inspection in time.
8. After successful operation, the power supply to the electric valve should be turned off.
9. When operating multiple valves at the same time, pay attention to the operating sequence and meet the production process requirements.
10. When opening a larger diameter valve with a bypass valve, if the pressure difference between the two ends is large, the bypass valve should be opened first to regulate the pressure, and then the main valve should be opened: After the main valve is opened, the bypass valve should be closed immediately.
11. When sending and receiving pigging balls (devices), the ball valves they pass through must be fully open.
12. Ball valves, gate valves, globe valves, and butterfly valves can only be fully opened or fully closed, and adjustment is strictly prohibited.
13. During the operation of gate valves, globe valves and flat plate valves, when closing or opening to the top dead center or bottom dead center, they should turn 1/2 to 1 turn.