Disassembly and assembly method of electric actuated ball valve
Electric actuated ball valves are rotary valves of the angular stroke and have been used more and more widely in recent years. It has a 90 degree rotation and the cock is a sphere with a circular through hole or passage through its axis. The ball valve is mainly used in the pipeline to cut, distribute and change the flow direction of the medium. It only needs to be rotated 90 degrees and the torque can be closed tightly. Ball valves are best suited for use as switching and shut-off valves, but recent developments have designed ball valves to provide throttling and control flow, such as V-ball valves.
The structure of the electric actuated ball valve is compact in structure, reliable in sealing, simple in structure, convenient in maintenance, the sealing surface and the spherical surface are often closed, not easily eroded by the medium, easy to operate and maintain, suitable for water, solvent, acid and natural gas. Working medium, but also suitable for medium with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene, which are widely used in various industries. The ball valve body may be integral or combined.
When there are some problems with the electric ball valve, we can check it by ourselves. Of course, we must master some basic common sense of the ball valve. Today we will talk about how to disassemble and assemble the ball valve!
Disassembly:
Put the valve in the half-open position to flush and remove dangerous substances that may exist inside and outside the valve. Close the ball valve, remove the connecting bolts and nuts on the flanges on both sides, and then completely remove the valve from the line. Disassemble the drive unit-actuator, connecting bracket, lock washer, stem nut, butterfly shrapnel, wear plate, and stem packing. Remove the body cover connecting bolts and nuts, separate the bonnet from the valve body, and remove the bonnet gasket. Verify that the electric ball valve is in the "off" position, which allows it to be easily removed from the valve body and then the seat is removed. Push the valve stem down from the hole in the valve body until it is completely removed, then remove the O-ring and the under-filler.
Note: Exercise caution to avoid scratching the stem surface and the body packing seal.
Reassemble:
Cleaning and inspection of the removed parts, it is highly recommended to replace the seals such as the seat and bonnet gasket with spare parts. Assemble in the reverse order of disassembly. Use the specified torque to cross-lock the flange connection bolts. Lock the stem nut with the specified torque. After installing the actuator, input the corresponding signal to rotate the spool through the rotary stem to open the valve to the open and closed positions. If possible, perform pressure seal testing and performance testing of the electric ball valve in accordance with relevant standards before returning the pipe.
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