AQUACHAIN GUIDE
Engineering diagnostics
Available · Professional review pendingEQP-01 · v1.0.0 · 2026-07-24

Centrifugal-pump flow, head and efficiency decline

Use this when centrifugal-pump flow, head and efficiency decline is observed but the cause remains unclear. The diagnostic checks measurement and sampling, operating changes, issue location, and key evidence before suggesting likely causes and the next useful check.

First time here? Start with this

You do not need every data point before you begin

The system asks one discriminating question at a time and updates the candidate causes on the right. Answer from current facts; choose unknown or defer a question when the evidence is not available.

  1. 1

    Confirm the issue

    Check whether the symptom is reproducible and whether the measurement or observation is reliable.

  2. 2

    Narrow the causes

    Continue through operating changes; enter flow, pressure, or quality data for local calculations when available.

  3. 3

    Read the live result

    Candidate causes, numeric evidence, counter-evidence, conflicts, and next actions update as you answer.

Start diagnosis

This tool analyzes information you already have. It does not insert a safety screen or use safety status to stop the diagnosis. If an alarm, leak, or injury is happening now, follow the site emergency procedure directly.

Automatic troubleshooting · Selections are not uploaded

Only one question is shown at a time. Answer from current facts or defer an unknown item. Possible causes and next checks update on the right as you answer.

Progress is saved in this browser
  1. 1Data validity
  2. 2Operating changes
  3. 3Issue location
  4. 4Further confirmation

Question progress

0/34

Answered
0
To confirm
34
Clues found
0
Load a test scenario

Next question

Phase 1 · Data validity

What are the specific speed, impeller, and liquid conditions for the manufacturer/acceptance Q-H-Power-Efficiency curve?

The system asks the question most useful for separating possible causes. Unknown or deferred items are not treated as the opposite conclusion.

Numeric evidence · Local calculation

Calculate directly when operating data is available

Choose a calculation relevant to the issue and enter values in the site units. The tool converts units, checks physical boundaries, and shows the result locally without an AI call or upload.

Values and results stay in this browser

Pump total head, hydraulic power, and efficiency boundary

v1.0.0

Calculates total head and hydraulic power from synchronized flow, suction/discharge pressure, density, elevation, and diameters; active electrical input adds wire-to-water efficiency.

Calculated results

Enter the required data for this calculation to see results.

Formula and boundary

Suction and discharge pressures must share one reference and steady window. Current or nameplate power does not replace measured active input. Electrical input produces wire-to-water efficiency, not pump-shaft efficiency.

Calculation sources
Baseline-to-current change

Calculates absolute and relative change before interpreting a trend.

Calculated results

Enter the required data for this calculation to see results.

Formula and boundary

Both values must represent the same quantity, point, unit, time basis, and comparable operating condition. Relative percent change is meaningful only on ratio scales with a true zero; pH, Celsius/Fahrenheit temperature, and zero-crossing ORP need a suitable domain model or absolute differences only. Two points do not replace trend analysis or normalization.

Calculation sources
I have more test or inspection resultsOptionalAdd laboratory analysis, normalized calculations, or checks completed by trained personnel when available. These fields are optional.
View rule sources (15)Standards, regulations, OEM material, and peer-reviewed literature used to audit the diagnostic logic. You do not need to read them before starting.

Each rule cites material directly relevant to its judgment. Current OEM and site procedures remain controlling.

Centrifugal-pump flow, head and efficiency decline | AquaChain Diagnostics