Total Head

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.

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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.

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