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 chief element in the art of statesmanship under modern conditions is the ability to elucidate the confused and clamorous interests which converge upon the seat of government. It is an ability to penetrate from the naïve self-interest of each group to its permanent and real interest.... Statesmanship ... consists in giving the people not what they want but what they will learn to want.”
    —Walter Lippmann (1889–1974)

    “Adolescence is when girls experience social pressure to put aside their authentic selves and to display only a small portion of their gifts.”
    —Mary Pipher (20th century)

    “O make harmonious mix of voice and string
    To him by whom the skies with clouds are lin’d;
    By whom the rain, from clouds to drop assign’d,
    Supples the clods of summer-scorched fields,”
    —Bible: Hebrew Psalm CXLVII (Paraphrased by The Countess of Pembroke)