Pumps Africa & ToolsVSD Pump Duty Scaler (Affinity Laws)Download PDFVariable Speed Duty CalculatorEnter duty point(s) at base Hz, scale to new Hz (Q/H/P), efficiency auto-calculated, and print a clean A4 report.ResetLoad exampleClient namePump model Base frequency (Hz)New frequency (Hz) to scale toAffinity laws: Q ∝ N, H ∝ N², P ∝ N³ (same impeller Ø). Q … Continue reading Variable Speed Curves