Pump Flow Degradation Tracker
Log delivered flow at reference duty readings, see the wear trend and get a projected date when the 80 m³/h limit will be reached.
Readings stay in your browser (localStorage) — nothing is uploaded.
Straight-line (least-squares) extrapolation of your logged readings to the 80 m³/h alarm threshold (warning at 88 m³/h). A low R² means the trend is noisy — log more readings before trusting the projection.
Field notes from maintenance practice
Measure smart: same discharge pressure, same valve position, same speed, then log flow — or log the discharge pressure at a fixed flow if that's easier to control. The economics write themselves: lost flow means longer running hours for the same job, so kWh/m³ rises in step. When the energy penalty exceeds the rebuild cost over a year, the projection date is your overhaul date. The default action limit of 80 m³/h comes from a typical economic rebuild point of ~80% of the new-pump flow at the same head and speed (defaults assume a 100 m³/h pump; scale to yours); adjust it if your OEM or procedure specifies otherwise.
Linear extrapolation is honest only when the R² is decent (≥ 0.7) and degradation is steady. Internal-clearance wear (wear rings, impeller erosion) bleeds flow gradually and almost linearly, so the projection is good — but verify each reading is at the same head and speed or the comparison is meaningless. If the last reading jumps far off the line, re-measure before believing it — measurement technique drifts too.
Sources & references
- ANSI/HI 9.6.3 / 14.6 — rotodynamic pump performance and acceptance tests
- KSB / Grundfos service guidance — wear ring clearance and performance loss
Trend screening only — confirm with a proper inspection before running equipment to a projected limit.
Pump Flow Degradation Tracker for maintenance and reliability teams: Log delivered flow at reference duty readings, see the wear trend and get a projected date when the 80 m³/h limit will be reached. Free, private (everything runs in your browser) and ready for daily plant use.
About Pump Flow Degradation Tracker
This tracker is a remaining-useful-life (RUL) estimator for delivered flow at reference duty. Log a dated reading whenever you measure; the tool fits a least-squares straight line through your history and projects when it will cross the 80 m³/h action limit (warning at 88 m³/h) — turning scattered measurements into a forecast date you can plan parts and downtime around.
How to use Pump Flow Degradation Tracker
- 1Enter each dated measurement as you take it — readings persist in your browser between visits.
- 2Adjust the alarm (and warning) threshold to your OEM or procedure limit if it differs from the default.
- 3Read the fitted trend, R², days-to-alarm and the projected date — then plan parts and downtime around that date.
Why use Pump Flow Degradation Tracker?
- ✓Log delivered flow at reference duty readings, see the wear trend and get a projected date when the 80 m³/h limit will be reached — computed instantly with the standard formula
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser — readings and asset data never leave your device
- ✓Niche-specific defaults and thresholds for delivered flow at reference duty, traceable to the cited standards
Frequently asked questions
What limit should trigger action for delivered flow at reference duty?+
The widely used limit is 80 m³/h (a typical economic rebuild point of ~80% of the new-pump flow at the same head and speed (defaults assume a 100 m³/h pump; scale to yours)). Set a warning at 88 m³/h so parts and labour are ready before the alarm. Your OEM manual or internal procedure overrides the generic figure.
Flow is down 15% but the pump sounds perfectly healthy — what wears without noise?+
Wear rings — the silent flow thief. Enlarged ring clearance recirculates flow from discharge back to suction inside the casing: no vibration, no noise, just lost capacity and wasted kW. A quick confirmation is shut-off head: dead-head the pump briefly and compare to the curve; low shut-off head with smooth running is the classic ring-wear signature. New rings typically restore 90%+ of lost performance.
How many readings before the projection is trustworthy?+
At least 4–6 spread over a meaningful fraction of the asset's life, with a fit R² of about 0.7 or better. Two points always make a perfect line — that is curve fitting, not condition monitoring. Keep measurement conditions (load, temperature, location) consistent.
Is straight-line extrapolation valid for wear?+
It is the standard first approximation for steady-state degradation, and it is deliberately conservative to act on. Many failure modes accelerate near the end (bathtub curve), so treat the projected date as the latest acceptable intervention date, not a promise.
Where is my logged data stored?+
Entirely in your browser's localStorage on this device — nothing is uploaded to any server. Export or note critical values elsewhere if you need a permanent maintenance record shared across a team.
Embed Pump Flow Degradation Tracker on your website
Want Pump Flow Degradation Trackeron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/pump-flow-degradation-tracker" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Pump Flow Degradation Tracker — ToolJolt" loading="lazy"></iframe>Related tools
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