ABSTRACT
Friction head-The energy needed to overcome friction in the piping system. It is expressed in terms of the added system head required. Head-The equivalent distance water must be lifted to move from the supply tank or inlet to the discharge. Head can be divided into three components: static head, velocity head, and friction head. Pressure-The force exerted per square unit of surface area. May be expressed in pounds per square inch. Static head-The actual vertical distance from the system inlet to the highest discharge point. Total dynamic head-The total of the static head, friction head, and velocity head. Velocity-The speed of a liquid moving through a pipe, channel, or tank. May be expressed in feet per second. Velocity head-The energy needed to keep the liquid moving at a given velocity. It is expressed in terms of the added system head required.
