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RELIABILITY ENGINEERING

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.

UPDATED 2026-09-24
TYPEFmea
EXAMPLECentrifugal Pump DFMEA
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CASE ANALYSIS

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.

FAQ

Frequently asked questions

What is a pump DFMEA?01
It is a design FMEA that identifies pump failure modes, their effects, causes and controls before the design is released.
Why include a mechanical seal?02
The seal contains process fluid, so wear or dry running can cause leakage or a pump shutdown.
What should the ratings reflect?03
Rate the actual effect, expected cause frequency and ability of current controls to detect the failure for the application.
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