Dynamic Head (System Head)



The dynamic head is the pump head generated by friction in the piping system.

Most people are familiar with the term “pressure drop” and are comfortable with the fact that the pumping fluid takes a pressure drop across valves and fittings as well as a pressure loss in the line. Since the term pressure is not used by centrifugal pump people (they substitute the term head) we would have to discuss a head drop in the system and that is not good English; so we say “loss of head due to friction in the piping, valves and fittings”.

All of these losses added together are called the dynamic or system head.

This dynamic head is combined with the static and pressure heads on both the suction and discharge side of the pump to describe the total head.

We calculate this information to make a system curve that describes the function of the pump.