1、BS EN1822-5:2009ICS 13.040.40; 23.120NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDHigh efficiency airfilters (EPA, HEPA andULPA)Part 5: Determining the efficiency offilter elementsThis British Standard was published under the authority of the Standards Policy
2、 and Strategy Committee on 31 January 2010 BSI 2010ISBN 978 0 580 61794 2Amendments/corrigenda issued since publicationDate CommentsBS EN 1822-5:2009National forewordThis British Standard is the UK implementation of EN 1822-5:2009. It supersedes BS EN 1822-5:2000 which is withdrawn.The UK participat
3、ion in its preparation was entrusted to Technical Committee MCE/21/3, Air filters other than for air supply for I.C. engines and compressors.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessar
4、y provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 1822-5:2009EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1822-5 November 2009 ICS 13.040.40 Supersedes EN 1822-5:2000English Ver
5、sion High efficiency air filters (EPA, HEPA and ULPA) - Part 5: Determining the efficiency of filter elements Filtres air haute efficacit (EPA, HEPA et ULPA) - Partie 5: Mesure de lefficacit de llment filtrant Schwebstofffilter (EPA, HEPA und ULPA) - Teil 5: Abscheidegradprfung des Filterelements Th
6、is 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 alteration. Up-to-date lists and bibliographical refer
7、ences 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 translation under the responsibility of a CEN member
8、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, Greece, Hungary, Iceland, Ireland, Italy, Lat
9、via, 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 Management Centre: Avenue Marnix 17, B-1000 Bruss
10、els 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1822-5:2009: EBS EN 1822-5:2009EN 1822-5:2009 (E) 2 Contents Page Foreword 4Introduction 51 Scope .62 Normative references .63 Terms and definitions 64 Description of the met
11、hod .74.1 General 74.2 Measurement method using fixed sampling probe 84.3 Scan method .84.4 Statistical efficiency test method for EPA filters (Group E) .85 Test filter 96 Test apparatus 96.1 General 96.2 Test duct 96.2.1 Test air conditioning 96.2.2 Adjustment of the volume flow rate 96.2.3 Measure
12、ment of the volume flow rate 96.2.4 Aerosol mixing section 96.2.5 Test filter mounting assembly .96.2.6 Measuring points for the pressure drop . 106.2.7 Sampling . 106.3 Aerosol generation and measuring instruments . 116.3.1 General . 116.3.2 Apparatus for testing with a monodisperse test aerosol 11
13、6.3.3 Apparatus for testing with a polydisperse test aerosol 127 Conditions of the test air 178 Test procedure . 178.1 Preparatory checks . 178.2 Starting up the aerosol generator 178.3 Preparation of the test filter 178.3.1 Installation of the test filter . 178.3.2 Flushing the test filter . 178.4
14、Testing 188.4.1 Measuring the pressure drop . 188.4.2 Testing with a monodisperse test aerosol 188.4.3 Testing with a polydisperse test aerosol 189 Evaluation . 1810 Test report 2011 Maintenance and inspection of the test apparatus 22Annex A (informative) Testing and classification method for filter
15、s with MPPS 0,1 m (e.g. membrane medium filters) 23A.1 Background 23A.2 MPPS of filters with Membrane filter medium 23A.3 Penetration consistency and uniformity of Membrane filter medium 23BS EN 1822-5:2009EN 1822-5:2009 (E) 3 A.4 Procedure for testing and classification of filters with Membrane fil
16、ter media . 23A.4.1 Integral Penetration 23A.4.2 Classification 24A.4.3 Local Penetration . 24A.5 Publication of data and labelling of products with membrane filter media . 24Annex B (normative) Testing and classification of filters using media with (charged) synthetic fibers . 26B.1 Background . 26
17、B.2 Scope . 26B.3 Procedure for testing and classification of HEPA and ULPA filters using media with (charged) synthetic fibres . 26B.4 Publication of data and labelling of products for HEPA and ULPA filters using media with (charged) synthetic fibres . 27Bibliography . 28BS EN 1822-5:2009EN 1822-5:
18、2009 (E) 4 Foreword This document (EN 1822-5:2009) has been prepared by Technical Committee CEN/TC 195 “Air filters 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
19、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 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 id
20、entifying any or all such patent rights. This document supersedes EN 1822-5:2000. It contains requirements, fundamental principles of testing and the marking for efficient particulate air filters (EPA), high efficiency particulate air filters (HEPA) and ultra low penetration air filters (ULPA). EN 1
21、822, High efficiency air filters (EPA, HEPA and ULPA), consists of the following parts: Part 1: Classification, performance testing, marking Part 2: Aerosol production, measuring equipment, particle counting statistics Part 3: Testing flat sheet filter media Part 4: Determining leakage of filter ele
22、ment (scan method) Part 5: Determining the efficiency of filter elements According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Esto
23、nia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 1822-5:2009EN 1822-5:2009 (E) 5 Introduction As decided by CEN/T
24、C 195, this European Standard is 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 re
25、lationships, this technique is based on particle counting at the most penetrating particle size (MPPS), which is for micro-glass filter media usually in the range of 0,12 m to 0,25 m. This method also allows the testing test ultra low penetration air filters, which was not possible with the previous
26、 test methods because of their inadequate sensitivity. For membrane and synthetic filter media, separate rules apply, see Annexes A and B of this standard. BS EN 1822-5:2009EN 1822-5:2009 (E) 6 1 Scope This European Standard applies to efficient particulate air filters (EPA), high efficiency particu
27、late 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. for applications in clean room technology or pharmaceutical industry. It establishes a procedure for the determination of the efficiency on the
28、 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 part of the EN 1822 series deals with measuring the efficiency of filter elements, specifying the conditions and procedures for carrying out
29、tests, describing a specimen test apparatus and its components, and including the method for evaluating test results. 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 re
30、ferences, the latest edition of the referenced document (including any amendments) applies. EN 779:2002, Particulate air filters for general ventilation Determination of the filtration performance EN 1822-1:2009, High efficiency air filters (EPA, HEPA and ULPA) Part 1: Classification, performance te
31、sting, marking EN 1822-2:2009, High efficiency air filters (EPA, HEPA and ULPA) Part 2: Aerosol production, measuring equipment, particle counting statistics EN 1822-3, High efficiency air filters (EPA, HEPA and ULPA) Part 3: Testing flat sheet filter media EN 1822-4, High efficiency air filters (EP
32、A, HEPA and ULPA) Part 4: Determining leakage of filter element (scan method) EN 14799:2007, Air filters for general air cleaning Terminology EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General pr
33、inciples and requirements (ISO 5167-1:2003) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14799:2007 and the following apply. 3.1 sampling duration time during which the particles in the sampling volume flow are counted (upstream or downstream) 3.2
34、measuring procedure with fixed sampling probes determination of the integral efficiency using fixed sampling probes upstream and downstream of the test filter BS EN 1822-5:2009EN 1822-5:2009 (E) 7 3.3 total particle count method particle counting method in which the overall number of particles witho
35、ut size classification can be determined in a certain test volume (e.g. by using a condensation nucleus counter) 3.4 particle counting and sizing method particle counting method which can determine both the number of particles and also their size distribution (e.g. by using an optical particle count
36、er) 4 Description of the method 4.1 General In order to determine the efficiency of the test filter it is fixed in the test filter mounting assembly and subjected to a test air volume flow corresponding to the nominal volume flow rate. After measuring the pressure drop at the nominal volume flow rat
37、e, the filter is purged with clean air and the test aerosol produced by the aerosol generator is mixed with the prepared test air along a mixing section, so that it is spread homogeneously over the cross section of the duct. The efficiency is always determined for the most penetrating particle size
38、(MPPS) (see EN 1822-3). The size distribution of the aerosol particles can optionally be measured using a particle size analysis system (for example a differential mobility particle sizer, DMPS). The testing can be carried out using either a monodisperse or polydisperse test aerosol. When testing wi
39、th (quasi-)monodisperse aerosol the total particle counting method can be used with a condensation nucleus counter (CNC) or an optical particle counter (OPC; for example a laser particle counter). It shall be ensured that the number median particle diameter corresponds to the MPPS, i.e. the particle
40、 diameter at which the filter medium has its minimum efficiency. When using a polydisperse aerosol, an optical particle counter shall be used, which in addition to counting the particles is also able to determine their size distribution. It shall be ensured that the median diameter DMof the test aer
41、osol lies in the range: 5,12 MPPSDMPPSMIn order to determine the integral efficiency, representative partial flows are extracted on the upstream and downstream sides of the filter element and led to the attached particle counter to measure the number of particles. The integral efficiency can be dete
42、rmined using one of two methods, either with fixed test sampling probes (see 4.2); or with one or several movable sampling probes downstream (scan method) (see 4.3). In both methods the sample upstream is taken using a fixed sampling probe. The upstream and downstream number concentrations and the i
43、ntegral efficiency are calculated from the particle count, the duration of the sampling and the sampling volume flow rate. BS EN 1822-5:2009EN 1822-5:2009 (E) 8 4.2 Measurement method using fixed sampling probe Using this method, the downstream sample used to determine the integral efficiency is tak
44、en using a fixed sampling probe. It is necessary to have a mixing section behind the test filter to mix the aerosol homogeneously with the test air over the duct cross section (see 6.2.4). 4.3 Scan method This integral efficiency can be determined by averaging the readings from the result of the lea
45、k test (scan method). The test rig for the scan method is described in EN 1822-4. In the scan method the downstream sampling is carried out directly behind the test filter using one or several moveable sampling probes, which can traverse the entire cross sectional area of the filter and its frame in
46、 overlapping tracks without any gaps. The test apparatus corresponds largely with that used with stationary sampling probes. The differences in the scanning method are that the downstream mixing section is not included and instead a three-dimensional tracking system is included downstream which move
47、s the probe(s). Since the test duct is usually open, provisions shall be made to prevent the intrusion of contaminated outside air into the test air flow. The arrangement of this test apparatus is described in EN 1822-4. In the scan method all the particles counted during the entire downstream scan
48、in the course of the leak testing are added together. The duration of the sampling is derived from the data of the scanning and the number of probes. The further clauses of this standard refer solely to the measuring method with fixed sampling probes where the integral efficiency is determined indep
49、endently from the leak test procedure. 4.4 Statistical efficiency test method for EPA filters (Group E) One of the test procedures as described in 4.2 and 4.3 must be used for EPA filters. However for EPA filters the efficiency test does not have to be carried out for each single filter element (as this is mandatory for HEPA Group
