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Re:urgent advise needed

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Claus Graf

This happened at a coker I worked a few years ago.
One of the overhead vapor valves (Ball 24″ MOV) got stuck. After operating a few more days the unit was shut down and the valve removed and taken apart, only to find that it was clean.
The solution was to change the reduction gears (ratio) between the motor and the valve. (to increase the torque on the valve)
Hope this helps

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