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Messrs. Forum:

Good morning, please provide your technical support regarding the attached Phase Analysis report that has been carried out to two Pumps; According to the report, it indicates that there is slight dynamic instability, but there are other opinions that say that the problem is the imbalance and not slight dynamic instability, please give your opinion on this.

Greetings and success.


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This is one strange approach. Here are some instructions:

- do not hide the whole machine on the photo and rather tell something about the machine type, characteristics...

- add vibration amplitudes and possible vibration spectra

- write down single phase values on each measurement point and direction, not phase difference

- I don't understand the term dynamic instability. It could be anything. What is the difference between the imbalance and dynamic instability. Each increased imbalance is dynamic instability. On the other hand not each dynamic instability is imbalance.

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