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