Head

The equivalent height of the liquid. The standard is 68°F (20°C) water, where 33.9 ft (10 m) of water equals 1 atm (14.7 psi or 1 bar). The term head is used instead of pressure in the centrifugal pump business.

See also Adiabatic Head; Cylinder Head; Dynamic Head (System Head); Elevation Head; Net Positive Suction Head; Polytropic Head; Pressure Head; Shut-Off Head (Centrifugal Pump); Static Head; Suction Head; System Head; Total Discharge Head; Total Head.