1、January 2011 Translation by DIN-Sprachendienst.English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 13.040.40!$l“1739625www.din.deDDIN EN 1822-3High efficiency air filters (EPA, HEPA and ULPA) Part 3: Testing flat sheet filter mediaEnglish translation of DIN EN 1822-3:2011-01Schwebstofffilter (EPA, HEPA und ULPA) Teil 3: Prfung des planen FiltermediumsEnglische bersetzung von DIN EN 1822-3:2011-
3、01Filtres air haute efficacit (EPA, HEPA et ULPA) Partie 3: Essais de medias filtrants plansTraduction anglaise de DIN EN 1822-3:2011-01SupersedesDIN EN 1822-3:1998-07www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.01.11 25DIN EN 1
4、822-3:2011-01 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 195 “Air filters for general air cleaning” (Secretariat: UNI, Italy). The responsible German body involved in its preparation was the Normenausschuss Maschinenbau (Mec
5、hanical Engineering Standards Committee), Working Committee NA 060-09-21-02 AK Schwebstofffilter of Section Allgemeine Lufttechnik. Representatives of stakeholders, manufacturers and users of high efficiency air filters, and of research and testing institutes contributed to this standard. The Europe
6、an Standards referred to in Clause 2 have been published as the corresponding DIN EN Standards with the same number. EN 1822 comprises 5 parts, which have been revised and published in 2009 as European Standards. Amendments This standard differs from DIN EN 1822-3:1998-07 as follows: a) an alternati
7、ve test method using a solid (instead of a liquid) test aerosol has been added; b) a method for testing and classification of filters made out of membrane type filter media has been added; c) a method for testing and classification of filters made out of synthetic fibre media has been added; d) a ne
8、w group “E” for efficient particulate air filters (EPA) has been added; e) an alternative method for leak testing of group H filters with other than panel shape has been added; f) editorial corrections have been implemented. Previous editions DIN 24184: 1974-10, 1990-12 DIN EN 1822-3: 1998-07 2 EURO
9、PEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1822-3 November 2009 ICS 13.040.40 Supersedes EN 1822-3:1998English Version High efficiency air filters (EPA, HEPA and ULPA) - Part 3: Testing flat sheet filter media Filtres air haute efficacit (EPA, HEPA et ULPA) - Partie 3: Essais de medias filtran
10、ts plans Schwebstofffilter (EPA, HEPA und ULPA) - Teil 3: Prfung des planen Filtermediums This European Standard was approved by CEN on 17 October 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the stat
11、us of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A
12、 version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republi
13、c, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NO
14、RMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1822-3:2009: EEN 1822-3:2009 (E) 2 Contents Page Foreword 3Introduction .41 Scope
15、52 Normative references 53 Terms and definitions .54 Symbols and abbreviations 55 Description of the test method .76 Sampling of sheet filter media 77 Test apparatus .77.1 General 77.2 Test arrangements for testing with monodisperse test aerosol .77.3 Test arrangements for testing with a polydispers
16、e test aerosol . 107.4 Test filter mounting assembly . 127.4.1 General . 127.4.2 Measurement of differential pressure 137.4.3 Sampling 137.5 Determination of the filter medium face velocity 148 Requirements for the test air . 149 Testing procedure. 149.1 Preparatory checks 149.2 Procedure 159.2.1 Ge
17、neral . 159.2.2 Measurement of the pressure drop . 159.2.3 Testing with a monodisperse test aerosol . 159.2.4 Testing with a polydisperse test aerosol . 159.3 Reference test method . 1510 Evaluation 1611 Test report . 1612 Maintenance and inspection of the test apparatus . 17Annex A (informative) Ex
18、ample of an application with evaluation . 18A.1 Testing the sheet filter medium . 18A.1.1 General . 18A.1.2 Measurement of the differential pressure 18A.1.3 Particle counting . 18A.2 Calculation of the arithmetic means . 19A.2.1 General . 19A.2.2 Mean differential pressure . 19A.2.3 Mean efficiency
19、E . 19A.2.4 Mean efficiencies E95%as lower limit values for the 95 % confidence interval 20A.3 Representation of the efficiency curve 21Bibliography . 23DIN EN 1822-3:2011-01 EN 1822-3:2009 (E) 3 Foreword This document (EN 1822-3:2009) has been prepared by Technical Committee CEN/TC 195 “Air filters
20、 for general air cleaning”, the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2010, and conflicting national standards shall be withdrawn at the latest b
21、y May 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1822-3:1998. It is dealing with the performanc
22、e testing of efficient particulate air filters (EPA), high efficiency particulate air filters (HEPA) and ultra low penetration air filters (ULPA). The series of standards EN 1822, High efficiency air filters (EPA, HEPA and ULPA) consists of the following parts: Part 1: Classification, performance te
23、sting, marking Part 2: Aerosol production, measuring equipment, particle counting statistics Part 3: Testing flat sheet filter media Part 4: Determining leakage of filter elements (scan method) Part 5: Determining the efficiency of filter elements As decided by CEN/TC 195, this European Standard is
24、based on particle counting methods which actually cover most needs of different applications. The difference between this European Standard and previous national standards lies in the technique used for the determination of the integral efficiency. Instead of mass relationships, this new technique i
25、s based on particle counting at the most penetrating particle size (MPPS; range: 0,12 m to 0,25 m). It also allows ultra low penetration air filters to be tested, which is not possible with the previous test methods because of their inadequate sensitivity. According to the CEN/CENELEC Internal Regul
26、ations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Nethe
27、rlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1822-3:2011-01 EN 1822-3:2009 (E) 4 Introduction As decided by CEN/TC 195, this European Standard is based on particle counting methods which actually cover most needs of differen
28、t applications. The difference between this European Standard and previous national standards lies in the technique used for the determination of the integral efficiency. Instead of mass relationships, this technique is based on particle counting at the most penetrating particle size (MPPS), which i
29、s for micro-glass filter mediums usually in the range of 0,12 m to 0,25 m. For Membrane filter media, separate rules apply, see Annex A of EN 1822-5:2009. This method also allows to test ultra low penetration air filters, which was not possible with the previous test methods because of their inadequ
30、ate sensitivity. DIN EN 1822-3:2011-01 EN 1822-3:2009 (E) 5 1 Scope This European Standard applies to high efficiency particulate air filters and ultra low penetration air filters (EPA, HEPA and ULPA) used in the field of ventilation and air conditioning and for technical processes, e.g. for applica
31、tions in clean room technology or pharmaceutical industry. It establishes a procedure for the determination of the efficiency on the basis of a particle counting method using a liquid test aerosol, and allows a standardized classification of these filters in terms of their efficiency. This European
32、Standard applies to testing sheet filter media used in high efficiency air filters. The procedure includes methods, test assemblies and conditions for carrying out the test, and the basis for calculating results. 2 Normative references The following referenced documents are indispensable for the app
33、lication of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1822-1:2009, High efficiency air filters (EPA, HEPA and ULPA) Part 1: Classification, performance testing, mar
34、king EN 1822-2:2009, High efficiency air filters (EPA, HEPA and ULPA) Part 2: Aerosol production, measuring equipment, particle counting statistics EN 14799:2007, Air filters for general air cleaning Terminology 3 Terms and definitions For the purposes of this document, the terms and definitions giv
35、en in EN 14799:2007 apply. 4 Symbols and abbreviations Table 1 contains the quantities (terms and symbols) used in this standard to represent measurement variables and calculated values. The values inserted in the equation given for these calculations should be in the units specified. DIN EN 1822-3:
36、2011-01 EN 1822-3:2009 (E) 6 Table 1 Quantities Term Symbol Unit Equation for the calculation Measured variables Exposed area A cm Test volume flow rate Vthe area to be tested shall be free from all folds, kinks, holes or other irregularities. All samples shall be clearly and permanently marked with
37、 the following details: a) The designation of the filter medium; b) The upstream side of the filter medium. 7 Test apparatus 7.1 General The test apparatus to be used and the arrangement of the components and measuring equipment are shown in Figure 1 of EN 1822-1:2009. The basic details for the aero
38、sol generation and the aerosol neutralisation, together with the details of suitable types of apparatus are contained in EN 1822-2. 7.2 Test arrangements for testing with monodisperse test aerosol When testing sheet filter media with a monodisperse test aerosol the particle number concentration is d
39、etermined using a total count method with a condensation nucleus counter. The arrangement of the test apparatus is shown in Figure 1. The monodisperse test aerosol is created in a number of steps. Firstly a polydisperse primary aerosol is produced using a jet nebuliser with, for example, a DEHS/Iso-
40、propanol solution. The particles are reduced to a DIN EN 1822-3:2011-01 EN 1822-3:2009 (E) 8 convenient size for the following process by evaporation of the solvent. The aerosol is then neutralised and passed to a differential mobility analyser. The quasi-monodisperse test aerosol available at the o
41、utput of the differential mobility analyser is once again neutralised, and then mixed homogeneously with filtered test air in order to achieve at the test volume flow rate required for the filter medium velocity. The mean particle diameter of the number distribution is varied by adjusting the voltag
42、e between the electrodes of the differential mobility analyzer1)In order to achieve a sufficiently high particle number concentration over the entire test range from 0,04 m to 0,8 m it may prove necessary to use several jet nebulizers with differing concentrations of the aerosol substances in the so
43、lvent. Numerical concentrations which are too high can be adjusted by diluting the test aerosol before the test filter mounting assembly. The number concentration in the test aerosol shall be selected so that no dilution is necessary for the measurements made downstream from the filter. A pump posit
44、ioned downstream draws the test aerosol through the test filter mounting assembly. This ensures that the differential mobility analyser can always operate under nearly the same conditions, independent of the pressure drop across the tested filter medium. In contrast, where the testing system operate
45、s with an overpressure this ensures that leaks in the system do not falsify the test measurements. Particles are counted upstream and downstream from the filter using either two condensation nucleus counters in parallel, or using only one such counter to measure the upstream and downstream concentra
46、tions alternately. If the level of the upstream number concentration exceeds the measuring range of the counter then a dilution system shall be included between the sampling point and the counter. 1) Actually, the adjustment gives the mode of number distribution. This can be taken as equal to the me
47、dian value with sufficient accuracy. DIN EN 1822-3:2011-01 EN 1822-3:2009 (E) 9 Key 1 Filter 2 Pressure valve 3 Solenoid valve 4 Jet nebuliser 5 Neutraliser 6 Differential mobility analyser 7 Needle valve 8 Test filter mounting assembly 9 Differential pressure gauge 10 Dilution system 11 Condensatio
48、n nucleus counter 12 Measuring equipment for absolute pressure, temperature and relative humidity 13 Volume flow rate meter 14 Vacuum pump 15 Computer for control and data storage Figure 1 Setup for testing with monodisperse test aerosols DIN EN 1822-3:2011-01 EN 1822-3:2009 (E) 10 7.3 Test arrangem
49、ents for testing with a polydisperse test aerosol When testing sheet filter media with a polydisperse test aerosol optical particle counters are used, which determine the number distribution and the number concentration of the test aerosol. The tests can be carried out directly with the polydisperse, neutralised primary aerosol. In order to cover the test range it may be necessary to
