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:

    “The generations of men run on in the tide of time,
    But leave their destined lineaments permanent for ever & ever.”
    —William Blake (1757–1827)

    “This is a catastrophic universe, always; and subject to sudden reversals, upheavals, changes, cataclysms, with joy never anything but the song of substance under pressure forced into new forms and shapes.”
    —Doris Lessing (b. 1919)

    “See, see where Christ’s blood streams in the firmament!
    One drop would save my soul—half a drop! ah, my Christ!—
    Ah, rend not my heart for naming of my Christ!—
    Yet will I call on him!—O, spare me, Lucifer!—
    Where is it now? ‘T is gone; and see where God
    Stretcheth out his arm, and bends his ireful brows!—
    Mountains and hills, come, come and fall on me,
    And hide me from the heavy wrath of God!”
    —Christopher Marlowe (1564–1593)