System Curve Calculator

Design Flow Rate (m³/h)

Pipe Length (m)

Fittings Equivalent Length (m)

Add equivalent length for fittings. Example: 10 elbows ≈ 15m, 5 valves ≈ 20m

Static Head (m)

Pipe Diameter (mm)

Leave 0 for auto-calculation. Minimum DN10 recommended.

Pipe Material

Fluid Temperature (°C)

Set density and viscosity to 0 for auto-calculation

Fluid Density (kg/m³)

Leave 0 to auto-calculate. Water at 20°C = 998 kg/m³

Dynamic Viscosity (Pa·s)

Leave 0 to auto-calculate. Water at 20°C = 0.001 Pa·s

Select a calculator to view information.

System Curve: H vs Q relationship for pump selection

Components: H_total = H_static + H_friction

Static Head: Elevation difference (constant)

Friction Head: Increases with Q² (quadratic)

Operating Point: Where pump curve meets system curve

Application: Pump sizing, control valve selection, NPSH check