Suspected pump cavitation: information to collect
Noise, vibration or a performance change should be recorded accurately before they are labelled as cavitation. Similar observations can have different causes. A structured information pack helps the qualified maintenance or engineering team investigate without turning a symptom into an unsupported diagnosis.
Record what changed
Note when the issue occurs, the operating condition and whether it followed a process, maintenance or control change. Distinguish a continuous observation from a startup event or an intermittent condition. Include existing instrument readings with units and measurement locations.
Collect the equipment and duty references
Provide the pump model, speed, applicable curve, fluid and temperature information, and available suction-side data. The Hydraulic Institute explains NPSH margin and operating regions as important review topics for pump reliability. Their assessment requires the particular pump and system information, not a universal number copied from another installation.
Keep observations safe and factual
Use the site’s approved procedures and qualified personnel. Do not open, dismantle or reach into operating equipment to collect information. Any intrusive inspection requires the appropriate shutdown, isolation and process controls. Record missing information as missing rather than taking unsafe measurements.
Connect findings to a component enquiry
If inspection leads to a replacement-part requirement, retain the approved part definition separately from the failure observations. A damaged sample may show the condition found; it does not automatically establish the geometry or material for a new component. Ask the responsible engineer whether any design change is actually approved.
Questions buyers ask
Does noise prove cavitation?
No. Treat it as an observation for investigation by qualified personnel.
Should I order a modified part immediately?
Obtain the technical diagnosis and approved replacement or modification requirement before committing to a changed design.
Read the pump curve information guide and the component RFQ checklist.
Technical reference
Hydraulic Institute: NPSH and pump operating regions. Use the equipment manufacturer’s current documentation for the particular assembly.