IEC_60534-8_4_Industrial_Process_Control_Valves_-_Noise_Considerations_1.pdf

IEC 534 PT*-4 94=4844893 0563552 445 NORME I NTE RN AT1 ON ALE INTERNATIONAL STANDARD c CE1 IEC Premire dition First edition 1994-05 Vannes de rgulation des processus industriels-Partie 8:Considrations sur le bruit-Section 4:Prdiction du bruit cr par un coulement hydrodynamique Industrial-process control valves-Part 8:Noise considerations-Section 4:Prediction of noise generated by hydrodynamic flow Numro de rfrence Reference number CEI/IEC 534-8-4:1994 COPYRIGHT International Electrotechnical CommissionLicensed by Information Handling ServicesCOPYRIGHT International Electrotechnical CommissionLicensed by Information Handling Services.IEC 534 PT*-4 94 m 4844893 0563553 381 W Rvision de la prsente publication Le contenu technique des publications de la CE I est cons-tamment revu par la Commission afin dassurer quil reflte bien ltat actuel de la technique.Les renseignements relatifs ce travail de rvision,ltablissement des ditions rvises et aux mises jour peuvent tre obtenus auprs des Cornit&nationaux de la C E I et en consultant les documents ci-dessous:Bulletin de la C E I Annuaire de la C E I Catalogue des publications de la C E I Publi annuelement Terminologie En ce qui concerne la terminologie gnrale,le lecteur se reportera la Publication 50 de la CEI:Vocabulaire Electrotechnique International(VEI),qui est tablie sous forme de chapitres spars traitant chacun dun sujet dfini,lIndex g-nral tant publi sparment.Des dtails complets sur le VE1 peuvent tre obtenus sur demande.Les termes et dfinitions figurant dans la prsente publication ont t soit repris du VEI,soit spkifiquement approuvs aux fins de cette publication.Symboles graphiques et littraux Pour les symboles graphiques,symboles littraux et signes dusage gnral approuvs par la C E I,le lecteur consultera:-la Publication 27 de la C E I:Symboles littraux utiliser en lectrotechnique;-ia Publication 617 de la C E I:Symboles graphiques pour schmas.Les symboles et signes contenus dans la prsente publication ont t soit repris des Publications 27 ou 617 de la C E I,soil spcifiquement approuvs aux fins de cette publication.Publications de la C E I tablies par le mme Comit dEtudes,Lattention du lecteur est aire sur le deuxime feuillet de la couverture,qui numre les publications de la C E I prpares par le Comit dEtudes qui a tabli la prsente publication.Revision of this publication The technical content of I E C publications is kept under wn-stant review by the I E C,thus ensuring that the content reflects current technology.Information on the work of revision,the issue of revised edi-tions and amendment sheets may be obtained from IEC National Committees and from the following I E C sources:1 I E C Bulletin IECYearbook Catalogue o f I E C Publications Published yearly Terminology For general terminology,readers are referred to I E C Publi-cation 50:Intemational Electrotechnical Vocabulary(IEV),which is issued in the form of separate chapters each dealing with a specific field,the General Index being published as a se-parate booklet Full details of the IEV will be supplied on request.The terms and definitions contained in the present publication have either been taken from the IEV or have been specifically approved for the purpose of this publication.Graphical and letter symbols For graphical symbols,and letter symbols and signs approved by the I E C for general use.readers are referred t o:-I E C Publication 27:Letter symbols to be used in electrical technology;-I E C Publication 617:Graphical symbols for diagrams.The symbols and signs contained in the present publication have either been taken from IEC Publications 27 or 617,or have been specifically a p v e d for the purpose of this publication.I E C publications prepared by the same Technical Committee The attention of readers is drawn to the back cover.which,lists IEC publications issued by the Technical Committee which has prepared the present publication.COPYRIGHT International Electrotechnical CommissionLicensed by Information Handling ServicesCOPYRIGHT International Electrotechnical CommissionLicensed by Information Handling ServicesIEC 534 PT*-4 94 m 4844893 0563554 218 m NORME INTERNATIONALE INTERNATIONAL STANDARD CE1 IEC 534-8-4 Premire dition First edition 1994-05 Vannes de rgulation des processus industriels-Partie 8:Considrations sur le bruit-Section 4:Prdiction du bruit cr par un coulement hydrodynamique Industrial-process control valves-Part 8:Noise considerations-Section 4:Prediction of noise generated by hydrodynamic flow 0 CE1 I994 Droits de reproduction rservs-Copyright-all rights reserved Aucuns partis de m e piMicaln m pan&re reprduila ni uti-SOUS quoique fm que c a sch e(par aucun pro d.Blecfroniqw w mcanique.y oonpris ia s o ies mcrofilms.sans laccord crii de lditeur.No pari 01 this pubbcatm may be reproduced o r u t e d in MY form or by any msans.e(ectronic or mechanical.nchdmg pholoo3pying and microfilm.wiihout permksion n wrtting from the publisher Bureau Centrai de ia Commission Electrote