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A petrochemical company used their Bently Nevada condition monitoring software to recognize a change in vibration
vector values of a compressor rotor. Comparison to historical data from an earlier incident helped them to conclude
that the change in balance condition was due to loss of metal from one stage of the rotor. It was determined
that a new rotor would be required although no spare rotor was immediately available. Understanding the machine’s
condition, however, allowed plant engineers to control the severity of the problem by reducing production through
the compressor while a new rotor was manufactured.
Maintaining production, even at reduced capacity, rather than the risk of complete rotor destruction
and a forced outage, saved the plant in excess of 1 million USD per day.
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