Orifice Plate - Permanent Pressure Drop For Incompressible Fluids

Permanent Pressure Drop For Incompressible Fluids

For a square-edge orifice plate with flange taps:

\frac{\Delta P_p}{\Delta P_i} = 1 - 0.24 \beta - 0.52 \beta ^2 - 0.16 \beta ^3

where:

= permanent pressure drop
= indicated pressure drop at the flange taps

And rearranging the formula near the top of this article:

\Delta P_i = P_1 - P_2 = \frac {Q^2 ~\rho~ (1 - \beta ^4)} {2 ~C_d^2~ A_2^2} = \frac {Q^2 ~\rho~ (1 - \beta ^4)} {2 ~C_d^2 ~A_1^2 ~\beta ^4}

Read more about this topic:  Orifice Plate

Famous quotes containing the words permanent, pressure and/or drop:

    “In reality, in love there is a permanent suffering which joy neutralizes, renders virtual, delays, but which can at any moment become what it would have become long earlier if one had not obtained what one wanted, atrocious.”
    —Marcel Proust (1871–1922)

    “Osteopath—One who argues that all human ills are caused by the pressure of hard bone upon soft tissue. The proof of his theory is to be found in the heads of those who believe it.”
    —H.L. (Henry Lewis)

    “There is regret. Always, there is regret.
    But it is better that our lives unloose,
    As two tall ships, wind-mastered, wet with light,
    Break from an estuary with their courses set,
    And waving part, and waving drop from sight.”
    —Philip Larkin (1922–1986)