Reply to "Vibration at 5X NDE AND DE V for Centrifugal Pump"

GREETINGS

WELL NOTED. 

THANKS FOR YOUR FEEDBACK.

PLEASE FOLLOW THIS METHOD AND TRY HOW YOUR VIBRATIONS ARE INDICATING.

1. CLOSE DISCHARGE VALVE AND START THE PUMP AFTER FEW SECONDS AT FULL SPEED AT MAXIMUM PRESSURE MEASURE THE VIBRATION SLOWLY OPEN DISCHARGE VALVE AND MEASURE THE VIBRATION. 

IF FLOW INCREASING TIME VIBRATION RISING IT IS RELATED TO FLOW SURGES CAUSING THE VIBRATION. IF STEADY AT EVERY DISCHARGE VALVE POSITION THEN THE VIBRATION IS NOT FLOW RELATED.

ALSO TAKE RUN UP AND COAST DOWN AND RECORD RESONANCE FREQUENCY.

BUMP TEST ALSO HELPS BUT RUN UP/COAST DOWN IS BETTER.

APPRECIATE YOUR FEEDBACK.

 

REGARDS

CHARY

 

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