Question: What is a performance curve and what is its significance?


A performance curve is many plotted duty points as the pump goes through the range of Meters (Feet) of lift vs. m³/h (GPM) flow. The primary significance of this is to look at the curve and size of the right pump to make a particular duty point. A performance curve's other significance is managing the pump's input power.

The pump's input power is the pump's power requirement under the present operating conditions. The rated motor output, including the operating factor, must be equal to or greater than the pump's power requirement. If the pump's power requirement is greater than the rated output of the motor, the motor is drawing more current than intended. This leads to overheating of the motor, and will potentially damage it.

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