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  • Fluid Power D

    ataFluid Pow

    er Data

    FLOW THRU ORIFICES

    TO DETERMINE DESIRED ORIFICE SIZE USE THE FOLLOWING FORMULA:

    Q = KA P

    = 18.94 X D2 P WHEN C = ORIFICE COEFFICIENT .6 ANDSG = .895, NO ALLOWANCE FOR VISCOSITY CHANGE

    Q = FLOW, GPMD = DIAMETER, INP = PRESSURE, PSI

    CV FACTORS FOR SHARP EDGE ORIFICES

    DIA

    .020

    .025

    .030

    .044

    .052

    .060

    .067

    .095

    EXAMPLE:1 gpm will pass through a1/16 diameter hole with a 140 psipressure drop. (See dashed line)

    GPM CU-INMIN

    HOLEDIA.

    AREASQ. IN.

    PSIPRESSURE

    DROP

    LIQUID FLOW THRU VALVE

    Q = Cv P / SG

    SHARP EDGE ORIFICE

    Q = 29.81 (C) (I.D.)2 P / SG= 18.9 D2

    WHEN SG IS .895

    NO ALLOWANCE FOR VISCOSITY CHANGE

    C = .6 FOR SHARP EDGEWALL THICKNESS IS LESS THANHOLE DIAMETER

    CV = GIVEN FACTOR

    I.D. = INSIDE DIA, IN P = CHANGE IN PRESS, (PSI)SG = SPECIFIC GAVITYQ = FLOW, GPM, OR SCFM

    CV

    009.014.02.04.06.08.10.20

    DIA

    .125

    .163.200.212.250.300.333.375

    CV

    .35

    .60

    .901.001.502.002.503.13

    DIA

    .395

    .423

    .448

    .472

    .515.539.578.625

    CV

    12.5017.3022.8036.3051.2071.0090.00

    100.00

    DIA

    .750

    .8751.001.251.501.752.002.10

    CV

    3.504.004.505.006.006.507.008.80

    .02

    .03

    .04

    .05

    .06

    .07

    .08

    .09.10

    .2

    .3

    .4

    .5

    .6

    .7

    .8

    .91.0

    2

    3

    4

    56789

    10

    15

    20

    2530

    40

    50

    60708090

    100

    150

    200

    5

    678910

    20

    30

    40

    50

    60708090100

    150

    200

    300

    400

    500600

    7008009001000

    1500

    2000

    25003000

    4000

    5000600070008000900010,000

    15,000

    20,000

    30,000

    40,000

    50,000

    1/64

    3/64

    1/165/64

    7/64

    3/16

    5/16

    7/16

    5/8

    7/8

    1 1/4

    1 3/4

    2 1/2

    3 1/2

    4 1/2

    1/32

    3/32

    1/8

    1/4

    3/8

    1/2

    3/4

    1

    1 1/2

    2

    3

    4

    .0001

    .00015

    .0002

    .0003

    .0004

    .0006

    .0008

    .001

    .0015

    .002

    .003

    .004

    .006

    .008

    .01

    .015

    .02

    .03

    .04

    .06

    .08

    .1

    .15

    .2

    .3

    .4

    .6

    .81.0

    1.522.5345

    79

    15

    6810

    10,0008,0006,000

    4,0003,000

    2,0001,500

    1,000800

    600

    400300

    200150

    10080

    60

    4030

    2015

    10865432.52

    1.5

    1

    .5

    CV FACTORS & ORIFICES

    FLUID POWER DATAPRESSURE DROPS THROUGH ORIFICES

    /ColorImageDict > /JPEG2000ColorACSImageDict > /JPEG2000ColorImageDict > /AntiAliasGrayImages false /CropGrayImages true /GrayImageMinResolution 300 /GrayImageMinResolutionPolicy /OK /DownsampleGrayImages true /GrayImageDownsampleType /Bicubic /GrayImageResolution 300 /GrayImageDepth -1 /GrayImageMinDownsampleDepth 2 /GrayImageDownsampleThreshold 1.50000 /EncodeGrayImages true /GrayImageFilter /DCTEncode /AutoFilterGrayImages true /GrayImageAutoFilterStrategy /JPEG /GrayACSImageDict > /GrayImageDict > /JPEG2000GrayACSImageDict > /JPEG2000GrayImageDict > /AntiAliasMonoImages false /CropMonoImages true /MonoImageMinResolution 1200 /MonoImageMinResolutionPolicy /OK /DownsampleMonoImages true /MonoImageDownsampleType /Bicubic /MonoImageResolution 1200 /MonoImageDepth -1 /MonoImageDownsampleThreshold 1.50000 /EncodeMonoImages true /MonoImageFilter /CCITTFaxEncode /MonoImageDict > /AllowPSXObjects false /CheckCompliance [ /None ] /PDFX1aCheck false /PDFX3Check false /PDFXCompliantPDFOnly false /PDFXNoTrimBoxError true /PDFXTrimBoxToMediaBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXSetBleedBoxToMediaBox true /PDFXBleedBoxToTrimBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXOutputIntentProfile () /PDFXOutputConditionIdentifier () /PDFXOutputCondition () /PDFXRegistryName () /PDFXTrapped /False

    /Description > /Namespace [ (Adobe) (Common) (1.0) ] /OtherNamespaces [ > /FormElements false /GenerateStructure true /IncludeBookmarks false /IncludeHyperlinks false /IncludeInteractive false /IncludeLayers false /IncludeProfiles true /MultimediaHandling /UseObjectSettings /Namespace [ (Adobe) (CreativeSuite) (2.0) ] /PDFXOutputIntentProfileSelector /NA /PreserveEditing true /UntaggedCMYKHandling /LeaveUntagged /UntaggedRGBHandling /LeaveUntagged /UseDocumentBleed false >> ]>> setdistillerparams> setpagedevice