The phenomenon of pumping vacuum when starting the condensate pump in a condensing steam turbine
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When A cuts B, with A remaining in operation, both pumps maintain normal pressure. When the motor of pump A stops, running pump B alone results in vacuum formation. At this point, evacuation occurs whether the exhaust line is open or closed. Dear experts, what are the possible causes of this phenomenon?
There may be an issue with the operation sequence of the reverse pump valve
The condensate temperature is high, the hot well level is low, there is gas inside the pump, and the pump has failed!
“When A cuts B, with A remaining in operation, both pumps maintain normal pressure. ”~~~~Do the two pumps share one outlet pressure gauge?