Pressure Differential
Pressure differential, abbreviated as \(\Delta p\) or \(p_d\), is the pressure difference between two points of a system.
PRESSURE DIFFERENTIAL formulas
| \(\large{ \Delta p = \frac { 1.59923 \; p \; d^4 \; \rho } { m_f^2 } }\) | |
| \(\large{ \Delta p = Eu \; \rho \; U^2 }\) | (Euler number) |
| \(\large{ \Delta p = SG \; \left( {\frac{Q} {C_c} } \right) ^{\frac{1}{2} } }\) | (flow coefficient) |
Where:
\(\large{ \Delta p }\) = pressure differential
\(\large{ U }\) = characteristic velocity
\(\large{ \rho }\) (Greek symbol rho) = density of fluid
\(\large{ Eu }\) = Euler number
\(\large{ C_v }\) = flow coefficient
\(\large{ Q }\) = flow rate capacity
\(\large{ d }\) = inside diameter of pipe
\(\large{ m_f }\) = mass flow rate
\(\large{ p }\) = pressure change
\(\large{ SG }\) = specific gravity of fluid (water at 60°F = 1.0000)
\(\large{ C_v = 1.157 \; K_v }\) (US units)
\(\large{ K_v = 0.8646 \; C_v }\) (SI )units