It has been noticed during performance test of horizontal centrifugal pump that vibration of motor coupled with pump casing with the help of shaft exceeds the applicable acceptance criteria given by my client. Manufacturer argues that the vibration level of motor will be higher if motor coupled with the casing. My question is that vibration level of motor to be used with pump casing should be checked in decoupling(motor alone) condition or with coupled condition(Casing+motor)?
This is AC motor of 45kw.
With Regards,
Rutvik
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