Total Dynamic Head (TDH) Definition

What is Total Dynamic Head?

Total Dynamic Head is the amount of pressure differential created by a pump as it operates.

The TDH developed by a pump is the difference between the suction pressure and discharge pressure of the pump while in operation.

A pump will generate TDH in response to the characteristics of a pumping system which can be expressed by a system curve. When a pump curve and a system curve are plotted on the same graph, the intersection of the curves is the point at which the pump will operate, and the head at that point is the TDH the pump will generate.

← Go Back: Pump Terms IndexAlso See: System Curve