Pressure Head
Pressure Head
Pressure is often expressed as a head — the height of fluid column it would support — which is convenient for pump and pipe work.
The head is h = p/(ρ·g). where p is the pressure, ρ the density and g gravity.
Inputs
p := 300 kPa=300000 Pa
rho := 1000 kg/m^3=1000 kg/m^3
g := 9.81 m/s^2=9.81 m/s^2
Convert pressure to an equivalent fluid height.
h := p/(rho·g)=30.58 m
Results
About 300 kPa equals 30 m of water head. Pumps are rated in head precisely because it is independent of the fluid’s density when comparing the same liquid.
Assumptions & limitations
- Static fluid.
- Constant density.
- Gauge pressure.