Diagnose the system, not just the pump
Low pressure, frequent trips, vibration, overheating, and leakage can each come from the pump, the system, or the control logic. Replacing the pump without diagnosis often repeats the same failure within a year.
A useful diagnosis compares actual discharge pressure with the duty point, measures current draw, checks suction gauge reading, listens for cavitation or bearing noise, reviews controller history, and inspects the installation for pipe strain, air pockets, or suction restriction.
- Cavitation and NPSH margin — suction conditions, pipe restriction, air ingress
- Mechanical seal and bearing condition
- VFD parameter and pressure switch settings
- Suction blockage, foot valve fouling, and strainer condition
- Duty point mismatch — pump operating outside its intended curve
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