ISO INTERNATIONAL STANDARD 29463-3 First edition 2011-10-15 High-efficiency filters and filter media for removing particles in air Part 3: Testing flat sheet filter media Filtres a haut rendement et filtres pour I'eliminationdes particules dans I'air- Partie 3:Methode d'essai des filtres a feuille plate Reference number ISO 29463-3:2011(E) ISO @ISO2011 ISO29463-3:2011(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IsO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale56.CH-1211Geneva 20 Tel. + 41 22 749 0111 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2011 All rights reserved ISO 29463-3:2011(E) Contents Page Foreword iv Introduction 1 Scope. 2 Normative references... 3 Terms anddefinitions 4 Symbols and abbreviations.. 5 Principle. 6 Sampling of sheet filter media.. 7 Testapparatus.. 7.1 Testarrangementsfortestingwithmono-dispersetestaerosol 7.2 Testarrangements fortestingwitha poly-dispersetest aerosol 7.3 Testfiltermountingassembly.. 7.4 Determinationofthefiltermediumfacevelocity 8 Requirements for the testair 9 Testing procedure... 9.1 Preparatorychecks 9.2 Procedure..... 9.3 Referencetestmethod. 10 Evaluation 10 11 Test report. ..11 12 Maintenanceand inspectionof thetestapparatus.. ..11 13 Productiontestformedia.. 12 13.1 Measurementofdifferential pressure 13.2 HEPA filter media penetration test.... 12 14 Physical propertytest of filter media. 12 AnnexA(informative)Exampleofanapplicationwithevaluation 13 AnnexB(informative)Productiontesting offiltermedia 17 AnnexC(informative)Mediaphysical properties.. Bibliography..... 20 @ ISO 2011 All rights reserved ili ISO29463-3:2011(E) Foreword Iso (the International Organization for Standardization)is a worldwidefederation of national standards bodies International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO29463-3waspreparedbyTechnicalCommitteeISO/TC142,Cleaningequipmentforairandothergases. removingparticlesinair: Part1:Classification,performance,testingandmarking Part2:Aerosol production,measuring equipment,particle-counting statistics —Part3:Testingflatsheetfiltermedia Part4:Testmethodfordeterminingleakageoffilterelement-Scanmethod 一 -Part5:Testmethodforfilterelements iv @ ISO 2011All rights reserved ISO29463-3:2011(E) Introduction ISO 29463 (all parts) is derived from EN 1822 (all parts) with extensive changes to meet the requests from filters in general orfor specific use by agreement between users and suppliers. a classification of these filters in terms of their efficiency, both local and overall efficiency, which actually covers most requirements of different applications. The difference between ISO 29463 (all parts) and other national standards lies in the technique used for the determination of the overall efficiency. Instead of mass relationships or total concentrations, this technique is based on particle counting at the most penetrating method also allows testing ultra-low penetration air filters, which was not possible with the previous test charged media is prescribed, a method for dealing with these types of filters is described in ISO 29463-5:2011, agreement between supplier and customer.For lower efficiency filters (group H, as described below), alternate leak test methods described in IsO29463