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Motorized Switch Valves

By Norm Lieberman

The use of the coke drum motorized switch valves in new delayed cokers has become pretty much standard. They have replaced the older Wilson-Snyder manual valve.

Problems and Pluses

Advantages of the motorized switch valve are obvious:

Problems with the Motorized Valve:

On several new cokers, and on one retrofitted unit, we have observed a number of inter-related and rather serious drawbacks with the motorized switch valve. It is our view that the nature of these problem calls into question the actual benefit of using the new automated switch valve, in comparison to the old Wilson-Snyder three-way valve. That is, newer is not always better:

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