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THE FEUTEX TOOLKIT

Pump Speed Affinity Scenario

Compare homologous pump flow, head and shaft power after a speed change.

Hydraulics workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaFor fixed geometry, Q∝N, H∝N² and P∝N³.
Sources and model references

Worked example

Inputs

Initial speed
1500 rpm
New speed
1800 rpm
Initial flow
0.02 m³/s
Initial head
20 m
Initial shaft power
5000 W

Expected results

Scaled flow
0.024 m³/s
Scaled head
28.8 m
Scaled shaft power
8640 W

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter every input in the labeled units; use measured or independently specified properties.
  2. Check the stated model assumptions before calculating.
  3. Interpret the output as a model estimate and verify it independently for the intended application.

Try this example

{
  "speed1": 1500,
  "speed2": 1800,
  "flow": 0.02,
  "head": 20,
  "power": 5000
}

Accuracy and scope

Homologous points at unchanged efficiency; actual system intersection, NPSH and manufacturer limits must be checked separately. Educational engineering estimate only; not structural or safety certification, equipment selection, or operating recommendations.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.