Centrifugal Pump DFMEA
A centrifugal pump DFMEA records how the pump can fail before it reaches the field. Start with the functions that matter to the process: containing fluid, delivering flow and transmitting motor torque. For each failure mode, connect the customer or process effect to a plausible design or installation cause. Severity belongs to the effect, occurrence to the cause and detection to the current control. The sheet then calculates a priority so the team can decide where to spend design effort. This example focuses on a mechanical seal, impeller and motor coupling. It is a useful starting point for a water, chemical or slurry pump, but the scores and controls should be reviewed against the actual fluid, duty cycle and installation.
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Scenario
A design team is reviewing a centrifugal pump before release.
Key decisions
- Seal materials: Check compatibility with abrasive process fluid.
- Dry-run protection: Trip the pump when suction flow is lost.
- Impeller life: Test erosion against the expected particle velocity.
- Alignment control: Verify coupling alignment during installation.
When to reuse this
Use this DFMEA when a pump design needs risks ranked before detailed release testing.
Frequently asked questions
What is a pump DFMEA?
Why include a mechanical seal?
What should the ratings reflect?
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