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RE: Quench water control valve failure


The typical design for these units are two valves in parallel, their design can be handled half the total flow of cooling, in the designs of FW, usually by placing a valve that handles between 20 to 30% of flow total and the other manages the total flow, this helps manage low flows (Rangeability) and when this is fully open the other begins to operate. Cooling ramps can be automatic based on the cooling curves of the drums, usually tries to maintain small flows  in the early hours and avoid problems of stress on the drums, there are additional protections to detect high pressure in the drum during this stage that stop the quenching  pumps

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