Pressure head

The pressure head describes the measure for a liquid's pressure and is expressed by:

p    Static pressure
ρ    Density of fluid handled
g    Acceleration due to gravity

According to EN 12723, pressure head is the pressure energy in a fluid under static pressure (p) per unit weight. Pressure head is expressed in metres (m).

Alongside the velocity head and the geodetic height, the pressure head is a component in Bernoulli's equation (see Fluid mechanics) used to calculate the total head.