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:

    “Thou hast an house on high erect,
    Framed by that mighty Architect,
    With glory richly furnished,
    Stands permanent though this be fled.”
    —Anne Bradstreet (c. 1612–1672)

    “Under the pressure of the cares and sorrows of our mortal condition, men have at all times, and in all countries, called in some physical aid to their moral consolations—wine, beer, opium, brandy, or tobacco.”
    —Edmund Burke (1729–1797)

    “Of all the words mentioned in language, there is not one that I hate more than the word “right.” Is it your right that your field prospers? That you don’t drop dead this very instant? Are living and breathing your right? As far as I can see, nothing but grace and blessing fill the universe, and these worms talk about right?”
    —Franz Grillparzer (1791–1872)