1. Find the manual operating device
First, locate the manual device on the pneumatic actuator. Typically, pneumatic ball valves come with an emergency manual switch or manual operating mechanism. This part may be a small handle or wheel, and some models may also have a special slot for inserting a manual control lever.
2. Cut off the gas source
Before manual operation, it is necessary to confirm that the gas source has been turned off. If the pneumatic actuator is still under pressure control, forced manual operation may damage the equipment. Turning off the gas source is key to ensuring safety and avoiding simultaneous action of the actuator and manual device.
3. Insert the manual control lever (if available)
Some pneumatic ball valves come with a manual control lever, which you only need to insert into the slot on the pneumatic actuator. After insertion, rotate the manual lever clockwise or counterclockwise to open and close the valve.
4. Directly rotate the manual switch
If there is no lever, but a manual wheel or handle, simply turn it. Normally, clockwise rotation closes the valve, while counterclockwise rotation opens the valve. Rotate slowly and do not apply too much force to avoid damaging the valve.
5. Restore the gas source after completing the operation
After completing the manual operation, remember to confirm the on/off status of the valve again. If automatic control needs to continue, restoring the air supply can allow the pneumatic actuator to resume operation.
This is the manual operation method for pneumatic ball valves, which is not complicated. The key is to find the manual switch or lever, cut off the gas source, and then manually open and close the valve. This method is very practical when encountering pneumatic control failures in daily life.
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