Pressure loss in terms of a length parameter such as inches of water or millimeters of mercury.
The pressure available on the outlet side of a hydronic pump. It is expressed in terms of feet of head. Feet of head represents the height of a column of water that is supported by a hydronic pump under standard atmospheric conditions.
That part of head energy, which is lost because of friction as water flows.
The pressure of water as measured at a stated point, either in feet or in pounds per square inch (PSI).
See Non-Recoverable Pressure Loss.
Obstructions to the flow of water to a hydro turbine. Anything from the friction on the inside of the pipeline, to water turbulence in the pipe or fittings which change the pipeline direction can slow the water flow down, causing head loss. See also: Impulse Turbine, Penstock, Static Pressure
The pressure lost by water flowing in a pipe or channel as a result of turbulence caused by the velocity of flowing water and the roughness of the pipe, channel walls or restrictions caused by fittings.
The loss of pressure in a flow system measured using a length parameter (i.e., inches of water, inches of mercury).
The loss of head between two points in a pipe or channel.
The reduction of water pressure (head), measured in psi, in a hydraulic or plumbing system.
The same as " pressure drop".