The flow pressure curves express how a pump will perform in regards to flow and pressure at certain pump speeds. The intersection of the flow pressure curves with the system load curve represents the achievable duty points. A Levitronix pump can operate at any duty point by adjusting the impeller speed.
The flow pressure curves are determined at specific test conditions such as density, viscosity, or liquid temperature. These test conditions need to be accounted for when using a pump in processes with different liquid properties.