The performance curve of the centrifugal pump shows various duty points that this element can reach. You should be aware that not being clear about this can create many problems for the installation.
It is imperative that you know that if the operating point of a pump is too far to the left on its curve, its capacity cannot be increased if a pressure miscalculation is detected.
On the other hand, if it is too far to the right, there is a risk of cavitation, which in practice could destroy the pump casing and cause the liquid to boil.
For peace of mind, a selection should be made that allows a safety margin of 10% to the left of the operating point, to ensure that the pump can operate under different conditions, as the efficiency can be reduced, but never increased.
There are some basic parameters that must be considered for a correct reading of the performance curve of a centrifugal or Positive Displacement pump: