Brief repair treatment of pneumatic ball valve: with a long service life and repair free period, it will rely on the following elements: normal working conditions, adherence to harmonious temperature/pressure ratio, and reasonable corrosion data. Note:
1. When the ball valve is closed, there is still pressurized fluid inside the valve body
2. Before repair, relieve the pipeline pressure and keep the valve in the open position
3. Before repair, disconnect the power or air supply 4. Before repair, Connect the actuator and bracket Detach from 1. The packing must be locked again 1. If there is slight leakage at the packing culvert, the valve stem nut must be locked again 2. Be careful not to lock it too tightly. Generally, lock it for another 1/4~1 turn, and the leakage will stop. 2、 Replace the valve seat and seal 1, keep the valve in the half open position, flush and remove the possible hazardous substances inside and outside the valve body. 2. Close the ball valve, remove the connecting bolts and nuts on the flanges on both sides, and then completely remove the valve from the pipeline. 3. Disassemble the drive equipment in sequence - actuator, joint bracket, lock washer, valve rod nut, butterfly spring piece, wear plate, valve rod packing. 4. Remove the body cover connecting bolts and nuts, separate the valve cover from the valve body, and remove the valve cover gasket. 5. Confirm that the pneumatic ball valve is in the "off" position, which can easily take it out of the valve body, and then take out the valve seat. 6. Push the valve rod down from the middle hole of the valve body until it is completely taken out, and then take out the O-ring and the lower packing of the valve rod. Attention: Please operate carefully to avoid scratching the valve rod surface and the sealing part of the valve body stuffing box
1. Clean and check the removed parts and replace the sealing elements such as the valve seat cover gasket.
2. Assemble in the reverse order of disassembly.
3. Cross lock the flange joint bolts with the specified torque.
4. Lock the valve stem nut with the specified torque.
5. After the actuator of the pneumatic ball valve of the equipment, the corresponding signal is input to drive the valve core to rotate by rotating the valve stem, so that the valve can reach the opening and closing positions.
6. If possible, please conduct pressure sealing test and performance test for the valve according to relevant specifications before reinstalling the pipeline.

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