coeficientes de perdidas locales en accesorios crane

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  • 8/20/2019 Coeficientes de Perdidas Locales en Accesorios CRANE

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    A · 2 6 APPENDIX A PHYSICAL PROPERTIES OF FLUIDS AND FLOW CHARACTERISTICS OF VALVES, FITTINGS, AND PIPE CRA N E

    K FACTOR TABLE-SHEET 1 of 4

    Representative Resistance Coefficients (K) for Valves and Fittings ( K is based on use o f schedule pipe as listed on page 2- 10)

    PIPE FRICTION DATA FOR CLEAN COMMERCIAL STEel PIPE WITH FlOW IN ZONE OF COMPLETE TURBULENCE

    Nominal Size Y2 711 Friction .027 .025Factor (fT)

    • Formula 1

    • Formula 2

    0, ; (I - (32) • Isin. .. 1

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    C R A N E APPENDIX A - PHYSICAL PROPERTIES OF flUIDS AND FLOW CHARACTERISTICS OF VALVES. FITTING S. AND PIPE A-27

    K FACTOR TABLE-SHEET 2 of 4

    Representat ive Resistance Coefficients (K) for Valves and Fittings (for formulos and friction data. see poge A·26)

    ( K is based on use of schedule pipe as listed on page 2· 10)

    GATE VALVES SWING CHECK VALVES Wedge Disc, Double Disc, or Plug Type

    If: {3 = I, j = 0 . 1< = 8fT {3 < 1 and (j :( -1-5°. . . . . . . . . ~ = Formula 5 {3 < 1 and 45° < j '< 180° . 1 -2 = Formula l1

    GLOBE AND ANGLE VALVES

    4 .../ .'/ \ . . , ,-, ' , . . ~_ _ ij , , -a , d a 'I . : ~ s z

    If: {3=I I

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    A - 28 APPENDIX A - PHYSICAL PROPERTIES OF FLUIDS AND f l O W CHARACTERISTICS OF VALVES, FITTINGS, AND PIPE C R A N

    K FACTOR TABLE-SHEET 3 of 4

    Representative Resistance Coefficients (K) for Valves and Fittings For formulas and friction data, see page A-26J

    ( K is based on use of scheduled pipe as listed on page 2- 10)

    STOP-CHECK V ALVES

    (Globe and Angle Types)

    If: i = I, , ,1

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    CRANE APPENDIX A - PHYSICAL PROPERTIES OF FLUIDS AND FLOW CHARACTERISTICS OF VALVES. FlnINGS. AND PIPE A-29

    UK FACTOR TABLE- SHEET 4 of 4

    Representative Resistance Coefficients (K) for Valves and Fittings (for formulas and friction dota, ee page A-26)

    ( K is based on use of schedule pipe as listed on page 2- 10)

    PLUG VALVES AND COCKS

    Straight-Way 3-Way

    If: t = I . 1