The required total head for a pump is calculated as the sum of the static head and the friction loss head in the pipe system.

Defined as the effective mechanical force exerted by the pump onto the pumped fluid and expressed as unit of weight at the local gravitational constant.

It is, at constant speed and constant flow, independent of the density of the fluid, but dependent on its viscosity.

## More articles on this topic

The static head means that part of the system H-Q curve that is unrelated to the flow.

### Waste water drainage

Decisive for the design is the expected wastewater discharge.

### Rainwater drainage

The precipitation values are climatically conditioned and regionally very different. Depending on their frequency, the rainfall donations that occur are differentiated into:

### Pump Performance Curve

The pumping performance of a centrifugal pump is expressed in the form of an H-Q curve, depicting the Flow Q (e.g. in m³/h) and the Head H (e.g. in m) of the pump.

### Calculating the System H-Q Curve

The system H-Q curve depicts the dependency of the total head Hsystem on the Flow Q.

### System Curve

The system H-Q curve is essentially a parabolic curve representing the relation between the head (pressure) required to handle the respective rate of flow within a pipe system.