To determine the correct size of a Mini-Compass magnetic centrifugal pump it is of fundamental importance to know the actual working point of the system, therefore the flow rate (Q) [m3/h] and the head (H) [m.c.l. or m] required, to identify the pump performance curve on which the point is available.
The graph of the pump performance curve indicates on the x-axis the flow rate, therefore the quantity of fluid that can be moved in a given time interval, and on the y-axis the head, i.e. the available energy that can be transferred to the fluid. As the flow rate increases, the available head decreases.
It is necessary to follow the 50 Hz or 60 Hz curve according to the mains frequency of the country in which the pump is used.