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:

    “Nothing is permanent in this wicked world—not even our troubles.”
    —Charlie Chaplin (1889–1977)

    “By school age, many boys experience pressure to reveal inner feelings as humiliating. They think their mothers are saying to them, “You must be hiding something shameful.” And shucking clams is a snap compared to prying secrets out of a boy who’s decided to “clam up.””
    —Ron Taffel (20th century)

    “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)