Cavitation:
Flow Recirculation versus Inadequate NPSHA
Q - Can you differentiate the symptoms of cavitation caused by internal flow
recirculation from that caused by inadequate NPSHA?
A - The following are some typical symptoms of cavitation caused by internal flow
recirculation:
The following are some typical symptoms of cavitation caused by inadequate
NPSHA:
Flow Recirculation versus Inadequate NPSHA
Q - Can you differentiate the symptoms of cavitation caused by internal flow
recirculation from that caused by inadequate NPSHA?
A - The following are some typical symptoms of cavitation caused by internal flow
recirculation:
- cavitation damage in the high pressure side of impeller vanes
- random crackling noise at pump suction side
- noise is reduced at higher flow rate
- vibration is at (or less than) 1x RPM, at vane pass frequency, or at odd
frequencies
The following are some typical symptoms of cavitation caused by inadequate
NPSHA:
- cavitation damage in the low pressure side of impeller vanes
- steady crackling noise at pump suction side
- noise is reduced at lower flow rate
- vibration is at odd frequencies
CENTRIFUGAL-PUMP.ORG
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Related topics
Introduction to cavitation
Impeller erosion
Noise and damage
Recirculation vs. insufficient NPSHA
Introduction to cavitation
Impeller erosion
Noise and damage
Recirculation vs. insufficient NPSHA
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