According to practical Capacity and Head requested, pick up the type of pump from the Performance Chart in this catalog, and it would be better to put the pumps’ optimal operating point among the running range of pumps. Optimal operating point of a pump is usually its rated point

    However, maybe there are some kinds of pumps satisfying both in the capacity and head on your need, in that case, please refer others points in this catalog before come to a final decision.