System Curve
Definition
A graph showing the relationship between head and flow rate for a piping system. The curve rises parabolically because friction losses increase with the square of flow rate: H = Hs + KQ².
Practical Note
The operating point is where pump curve intersects system curve. For variable flow, VFDs shift the pump curve; throttling moves along the system curve but wastes energy.
Related Calculators
💧Pump Sizing Calculator
Calculate pump power requirements, total dynamic head, and motor sizing. Determine pump type based on specific speed and NPSH availability.
🔧Pipe Pressure Drop Calculator
Calculate pressure drop in straight pipes using the Darcy-Weisbach equation. Determine flow regime, friction factor, and head loss.