Pressure Loss

Written by Matt Milbury on . Posted in Pump

presser dropPressure loss, abbreviated as \(\Delta P\), also called pressure drop, is the difference in pressure between two points, usually caused by friction resistance in the pipe, but moisture can also affect it.

 

Formulas that use Pressure Loss

\(\large{ \Delta P = \frac{f \; l  \;v^2}{2 \; g \; d}  }\)   
\(\large{ \Delta P = \frac{f \; l  \;v^2}{2 \; g \; d}  }\)   
\(\large{ \Delta P =  2 \;  f_f   \left( \frac{ l }{ d } \right)  \left( \rho \;  \bar {v}^2 \right)  }\)   

Where:

\(\large{ \Delta P }\) = pressure loss

\(\large{ \bar {v}  }\) = average velocity

\(\large{ \rho }\)   (Greek symbol rho) = density

\(\large{ f_f }\) = Fanning friction factor

\(\large{ f }\) = friction factor

\(\large{ g }\) = gravirational acceleration

\(\large{ d }\) = inside diameter of pipe

\(\large{ l }\) = lenght of pipe

\(\large{ v }\) = velocity of fluid

 

Tags: Equations for Pressure