The pump inlet pipe vibrates severely
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There are three pumps on site, A/B/C. When only pump A is operated, the pipelines and equipment function normally. When pumps A and B or A and C are operated, it is only the inlet pipe of pump A that vibrates significantly; when pumps B and C are operated, the pipelines function normally. The inlet and outlet of pump A, as well as the inside of the volute, have been checked and show no signs of blockage or debris. I would like to ask how to address this phenomenon
Not securely fixed? Resonance? Cavitation?
It might be due to insufficient water flow, or resonance.
There should be one main pipe supplying 3 pumps; it’s likely that there is an issue with the piping layout. Compare the differences between AB and BC.
The liquid level is 3 m above the pump inlet; the vibration levels of AB and AC are different, but such a situation has not occurred before
Was pump A serviced this time? What was done for the maintenance?
If the cause really cannot be found, and if the pumps are of the same specification, it is recommended to try replacing the pump. Swap A and B or C.