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
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