1. Preparation before operation
1. Before operating the valve, you should read the operation instructions carefully.
2. Before operation, the flow direction of the gas must be clear, and attention should be paid to check the opening and closing signs of the valve.
3. Check the appearance of the electric valve to see whether the electric valve is damp, and if it is damp, it should be driedIf other problems are found, they should be dealt with in a timely manner, and no faulty operation should be allowed.
4. For electric devices that have been out of service for more than 3 months, check the clutch before starting, confirm that the handle is in the manual position, and then check the insulation, steering and electrical wiring of the motor.
IIPrecautions for the operation of electric valves
1. When starting, confirm that the clutch handle is in the corresponding position.
2. If the electric valve is controlled in the control room, the transfer switch is set to a large remote position, and then the switch of the electric valve is controlled through the SCADA system.
3. If it is manually controlled, the transfer switch is played in the local position, and the switch of the electric valve is operated on the spot, and it will automatically stop working when the electric valve is opened or closed in place, and then the operation of the transfer switch is played to the middle position.
4. When the valve is operated on site, the valve opening and closing indication and valve stem operation should be monitored, and the valve opening and closing degree should meet the requirements.
5. When the valve is fully closed by on-site operation, the electric valve should be stopped before the valve is closed in place, and the valve should be closed in place by micro motion.
6. When the valve after the stroke and over-torque controller is fully opened or closed, attention should be paid to monitoring the control of the stroke, and if the valve switch to the position is not stopped, it should be manually stopped immediately.
7. In the process of opening and closing the valve, when it is found that the signal indicator is wrong and the valve has an abnormal sound, it should be stopped for inspection in time.
8. After successful operation, the power supply of the electric valve should be turned off.
9. When operating multiple valves at the same time, attention should be paid to the operation sequence and meet the requirements of the production process.
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: after the main valve is opened, the bypass valve should be closed immediately.
11. When sending and receiving pigging balls (devices), the ball valve through which it passes must be fully opened.
12. The operation of ball valves, gate valves, globe valves, and butterfly valves can only be fully opened or closed, and it is strictly forbidden to use them for adjustment.
13. In the process of operating the gate valve, globe valve and plate valve, when it is closed or opened to the upper dead center or bottom dead center, it should be rotated 1 2 1 turns.
Detersen electric valves