The performance curve of the centrifugal pump displays various operating points that this component can achieve. You should bear in mind that not understanding this can lead to many installation problems.
It is essential to know that if a pump’s operating point is too far to the left on its curve, its capacity cannot be increased if a pressure calculation error is detected.
On the other hand, if it is too far to the right, there is a risk of cavitation, which in practice could damage the pump casing and lead to liquid boiling.
For added peace of mind, one should make a selection that allows for a 10% safety margin to the left of the operating point, ensuring that the pump can operate under various conditions, as performance can be reduced but never increased.
There are a number of basic parameters that must be taken into account for a correct reading of the performance curve of a centrifugal or positive Displacement Pump: