1、January 2011 Translation by DIN-Sprachendienst.English price group 13No 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“1739895www.din.deDDIN EN 1822-2High efficiency air filters (EPA, HEPA and ULPA) Part 2: Aerosol production, measuring equipment, particle countingstatisticsEnglish translation of DIN EN 1822-2:2011-01Schwebstofffilter (EPA, HEPA und ULPA) Teil 2: Aerosolerzeugung, Messgerte, Partikelz
3、hlstatistikEnglische bersetzung von DIN EN 1822-2:2011-01Filtres air haute efficacit (EPA, HEPA et ULPA) Partie 2: Production darosol, quipement de mesure et statistiques de comptage departiculesTraduction anglaise de DIN EN 1822-2:2011-01SupersedesDIN EN 1822-2:1998-07www.beuth.deDocument comprises
4、 pagesIn case of doubt, the German-language original shall be considered authoritative.2801.11 DIN EN 1822-2:2011-01 2 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,
5、Italy). The responsible German body involved in its preparation was the Normenausschuss Maschinenbau (Mechanical Engineering Standards Committee), Working Committee NA 060-09-21-02 AK Schwebstofffilter of Section Allgemeine Lufttechnik. Representatives of stakeholders, manufacturers and users of hig
6、h efficiency air filters, and of research and testing institutes contributed to this standard. The European Standards and the International Standard referred to in Clause 2 have been published as the corresponding DIN EN or DIN EN ISO Standards with the same number. EN 1822 comprises 5 parts, which
7、have been revised and published in 2009 as European Standards. Amendments This standard differs from DIN EN 1822-2:1998-07 as follows: a) an alternative 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 memb
8、rane 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 new 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 p
9、anel shape has been added; f) editorial corrections have been implemented. Previous editions DIN 24184: 1974-10, 1990-12 DIN EN 1822-2: 1998-07 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1822-2 November 2009 ICS 13.040.40 Supersedes EN 1822-2:1998English Version High efficiency air filters
10、 (EPA, HEPA and ULPA) - Part 2: Aerosol production, measuring equipment, particle counting statistics Filtres air haute efficacit (EPA, HEPA et ULPA) - Partie 2: Production darosol, quipement de mesure et statistiques de comptage de particules Schwebstofffilter (EPA, HEPA und ULPA) - Teil 2: Aerosol
11、erzeugung, Messgerte, Partikelzhlstatistik 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 status of a national standard without any alteratio
12、n. 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 version in any other language made by translat
13、ion 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 Republic, Denmark, Estonia, Finland, France, Germany,
14、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 NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Mana
15、gement 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 1822-2:2009: EEN 1822-2:2009 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definition
16、s .54 Aerosol production 54.1 General 54.2 Aerosol substances .54.3 Producing monodisperse aerosols74.3.1 Condensation methods .74.3.2 Particle size classification . 114.4 Generating polydisperse aerosols 114.5 Neutralisation of aerosols 114.6 Minimum performance parameters for aerosol generators .
17、124.7 Sources of error 124.8 Maintenance and inspection 125 Measuring devices 125.1 Optical particle counters 125.1.1 Operation . 125.1.2 Minimum performance parameters . 135.1.3 Sources of error and limit errors . 145.1.4 Maintenance and inspection 145.1.5 Calibration . 145.2 Condensation nucleus c
18、ounter . 145.2.1 Operation . 145.2.2 Minimum performance parameters . 165.2.3 Sources of error and limit errors . 165.2.4 Maintenance and inspection 175.2.5 Calibration . 175.3 Differential mobility analyser . 175.3.1 Operation . 175.3.2 Minimum performance parameters . 185.3.3 Sources of error and
19、limit errors . 185.3.4 Maintenance and inspection 195.3.5 Calibration . 195.4 Particle size analysis system on the basis of differential mobility analysis 195.4.1 Operation . 195.4.2 Minimum performance parameters . 195.4.3 Sources of errors and error limits . 195.4.4 Maintenance and inspection 195.
20、4.5 Calibration . 195.5 Dilution systems . 205.5.1 Operation . 205.5.2 Minimum performance parameters . 205.5.3 Sources of error and limit errors . 205.5.4 Maintenance and inspection 205.6 Differential pressure measuring equipment 205.7 Absolute pressure measuring equipment 215.8 Thermometers . 215.
21、9 Hygrometer 216 Maintenance and inspection intervals 217 Particle counting statistics 23Bibliography . 25 DIN EN 1822-2:2011-01 EN 1822-2:2009 (E) 3 Foreword This document (EN 1822-2:2009) has been prepared by Technical Committee CEN/TC 195 “Air filters for general air cleaning”, the secretariat of
22、 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 by May 2010. Attention is drawn to the possibil
23、ity 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 1822-2:1998. It is dealing with the performance testing of efficient particulate air filters
24、 (EPA), high efficiency particulate air filters (HEPA) and ultra low penetration air filters (ULPA) at the manufacturers site. EN 1822, High efficiency air filters (EPA, HEPA and ULPA), consists of the following parts: Part 1: Classification, performance testing, marking Part 2: Aerosol production,
25、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 This European Standard is based on particle counting methods which actually cover most needs o
26、f different applications. The difference between this European Standard and its previous edition lies in the addition of: an alternative test method for using a solid, instead of a liquid, test aerosol; a method for testing and classification of filters made out of membrane type filter media; a meth
27、od for testing and classification filters made out of synthetic fibre media; and an alternative method for leak testing of group H filters with other than panel shape. Beside that, various editorial corrections have been implemented. According to the CEN/CENELEC Internal Regulations, the national st
28、andards 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, Netherlands, Norway, Poland,
29、 Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1822-2:2011-01 EN 1822-2:2009 (E) 4 Introduction As decided by CEN/TC 195, this European Standard is based on particle counting methods which actually cover most needs of different applications. The dif
30、ference 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 is for micro-glass filte
31、r mediums usually in the range of 0,12 m to 0,25 m. For Membrane filter media, separate rules apply; see EN 1822-5:2009, Annex A. This method also allows testing ultra low penetration air filters, which was not possible with the previous test methods because of their inadequate sensitivity. DIN EN 1
32、822-2:2011-01 EN 1822-2:2009 (E) 5 1 Scope This European Standard applies to efficient particulate air filters (EPA), high efficiency particulate air filters (HEPA) and ultra low penetration air filters (ULPA) used in the field of ventilation and air conditioning and for technical processes, e.g. fo
33、r applications 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 (or alternatively a solid) test aerosol, and allows a standardized classification of these filters in terms
34、 of their efficiency, both local and integral efficiency. This European Standard describes the measuring instruments and aerosol generators used in the course of this testing. With regard to particle counting it specifies the statistical basis for the evaluation of counts with only small numbers of
35、counted events. 2 Normative references The following referenced documents are indispensable for the application 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:
36、2009, High efficiency air filters (EPA, HEPA and ULPA) Part 1: Classification, performance testing, marking EN 1822-3, High efficiency air filters (EPA, HEPA and ULPA) Part 3: Testing flat sheet filter media EN 14799:2007, Air filters for general air cleaning Terminology 3 Terms and definitions For
37、the purposes of this document, the terms and definitions given in EN 14799:2007 apply. 4 Aerosol production 4.1 General When testing a filter a test aerosol with liquid particles shall be used as reference test method and as defined in EN 1822-1. Alternatively, a solid PSL aerosol can be used for lo
38、cal efficiency (leak) testing (see EN 1822-4:2009, Annex D). The testing of high-performance filters (U16 and U17) requires methods of aerosol production with high production rates (1010s-1to 1011s-1), in order to provide statistically significant measurements downstream of the filter. By adjusting
39、the operating parameters of the aerosol generator it shall be possible to adjust the mean particle diameter of the aerosol so that it is equal to the MPPS. The concentration and the size distribution of the aerosol produced shall remain constant throughout the test. 4.2 Aerosol substances A suitable
40、 aerosol substance for the reference test method is a liquid with a vapour pressure which is so low at the ambient temperature that the size of the droplets produced does not change significantly due to evaporation over the time scale relevant for the test procedure (typically max. 5 s). DIN EN 1822
41、-2:2011-01 EN 1822-2:2009 (E) 6 Possible substances include but are not limited to: DEHS; PAO; Paraffin oil (low viscosity). The most critical properties of a possible aerosol substance are: Index of refraction; Vapour pressure; Density; which should not differ too much from the values given for the
42、 three substances suggested in Table 1. NOTE Standard laboratory safety regulations should be observed when handling these substances. It should be ensured by means of suitable exhaust systems and air-tight aerosol ducting systems that the test aerosols are not inhaled. In case of doubt the safety d
43、ata sheets for the appropriate substances should be consulted. DIN EN 1822-2:2011-01 EN 1822-2:2009 (E) 7 Table 1 Important data for aerosol substances at 20 C DEHS PAO aParaffin oil (low visc.) Chemical designation Sebacic acid-bis(2-ethylhexyl) ester Poly-Alpha-Olephin (e.g. CAS bNo. 68649-12-7) M
44、ixture (e.g. CAS # 64742-46-7)Trivial name Diethylhexylsebacyte Polyalphaolefin Paraffinoil Density (kg/m3) 912 800 820 (820 c) 843Melting point (K) 225 280 259 Boiling point (K) 529 650 780 (674 c) Flash point (K) 473 445 500 453 Vapour pressure at 293 K (Pa) 1,9 100 130Dynamic viscosity (kg/m s) 0
45、,022 to 0,024 0,003 1 0,004 at 373 K (0,013 at 313 K c) (Kinematic viscosity at 373 K: 3,8 4,1 mm2/s) 0,026 Index of refraction/ wavelength (nm) 1,450/650 1,452/600 1,453 5/550 1,454 5/500 1,458 5/450 1,475/400 (1,455 6 c) a US Patents 5,059,349 3 and 5,059,352 4 describe and restrict the use of PAO
46、 for filter testing. Material properties of PAO as per Japan JACA Standard No. 37-2001: “The guideline of substitute materials to DOP” 5, Japan JISZ Standard No. 8901-206 6 and ISO Standard No. 14644-3 7.b CAS #, Chemical Abstracts Service Registry Number, substances have been registered in Chemical
47、 Abstracts, issued by American Chemical Society 8.c Data for “Emery 3004” as a specific example of a PAO. Source: Crosby, David W., Concentration produced by a Laskin nozzle generator, a comparison of substitute materials and DOP, 21st DOE/NRC Nuclear Air Cleaning Conference 9.4.3 Producing monodisp
48、erse aerosols 4.3.1 Condensation methods 4.3.1.1 General Condensation methods are preferred for the creation of monodisperse aerosols, i.e. the particles are formed by condensation from the vapour phase. It is necessary to distinguish between heterogeneous and homogeneous condensation. DIN EN 1822-2:2011-01 EN 1822-2:2009 (E) 8 4.3.1.2 Heterogeneous condensation 4.3.1.2.1 General In the case of heterogeneous condensation the vapour condenses at a relatively low level of supersaturation onto very small particles which are already present, the so-called condensation nuclei. The size
