《BS-EN-779-1993.pdf》由会员分享,可在线阅读,更多相关《BS-EN-779-1993.pdf(30页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 779:1993 Incorporating Amendment No. 1 Particulate air filters for general ventilation Requirements, testing, marking The European Standard EN 779:1993 has the status of a British Standard UDC 628.84:621.928.9:620.1:62-777 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07
2、 03:38:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 779:1993 This British Standard, having been prepared under the direction of the General Mechanical Engineerng Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 October 1993 BSI 0
3、1-1999 The following BSI references relate to the work on this standard: Committee reference GME/14 Announced in BSI News October 1993 ISBN 0 580 21267 X Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises
4、 the national standards organizations of the following countries: AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normu
5、ng e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standar
6、diseringsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComme
7、nts 8367November 1994 Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:38:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 779:1993 BSI 01-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of EN 7793 N
8、ational annex NA (informative) Committees responsibleInside back cover Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:38:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 779:1993 ii BSI 01-1999 National foreword This British Standard has been prepared under the direction of the General
9、 Mechanical Engineering Standards Policy Committee and is the English language version of EN 779:1993 Particulate air filters for general ventilation Requirements, testing, marking, published by the European Committee for Standardization (CEN). This British Standard supersedes BS 6540-1:1985, which
10、is withdrawn. EN 779:1993 was produced as a result of discussions in Europe in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance
11、 with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 24, an inside back cover and a back cover. This standard has been updated (see copyright da
12、te) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:38:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 779 July 1993 UDC 628
13、.84:621.928.9:620.1:62-777 Descriptors: Air filters, ventilation, air cleaners, specifications, tests, marking English version Particulate air filters for general ventilation Requirements, testing, marking Filtres air de ventilation gnrale pour llimination des particules Exigences, essais, marquage
14、Partikel-Luftfilter fr die allgemeine Raumlufttechnik Anforderungen, Prfung, Kennzeichnung This European Standard was approved by CEN on 1993-07-20. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status o
15、f a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A versi
16、on in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Gree
17、ce, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1993 Copyright rese
18、rved to CEN members Ref. No. EN 779:1993 E Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:38:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 779:1993 BSI 01-1999 2 Foreword This European Standard has been prepared by the Technical Committee CEN/TC 195 Air filters for general air cleaning
19、, of which the secretariat is held by IBN. As a result of a questionnaire procedure CEN has decided to accept EUROVENT 4/5 Method of testing air filters used in general ventilation as basic document for a European Standard. The test method in this document is taken from ASHRAE standard 52-76 Method
20、of testing air-cleaning filters used in general ventilation for removing particulate matter. 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 January 1994, and conflicting national standards shall
21、be withdrawn at the latest by January 1994. In accordance with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Belgium, Denmark, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Portugal, Spain, Switzerland and Un
22、ited Kingdom. Contents Page Foreword2 1Scope3 2Normative reference3 3Definitions and units3 4Classification4 4.1Group of filters4 4.2Classes of filters4 5Requirements4 5.1Generalities4 5.2Materials4 5.3Rated airflow rate4 5.4Pressure drop5 5.5Filtration performance5 6Testing methods5 6.1Test rig5 6.
23、2Measurement of airflow and the determination of the initial pressure drop of the filter6 6.3Atmospheric dust spot efficiency6 6.4Synthetic dust weight arrestance9 6.5Determination of dust-holding capacity, average efficiency, average arrestance and pressure drop10 Page 7Marking12 Annex A (normative
24、) Examples of calculations of the value of the average synthetic dust weight assistance13 Annex B (normative) Examples for establishing the average atmospheric dust spot efficiency14 Annex C (normative) Test report15 Annex D (normative) Figures18 Figure D.1 Scheme of the test rig18 Figure D.2 Dimens
25、ions of the test rig, measurement of the flow volume18 Figure D.3 Transition pieces18 Figure D.4 Sampling head and target holder19 Figure D.5 Critical flow nozzle20 Figure D.6 Piping arrangements and wiring diagram for timer control of sampling20 Figure D.7 Wiring diagram21 Figure D.8 Valve position
26、s with programme control21 Figure D.9 Opacity meter and potentiometer22 Figure D.10 Light transmission standard22 Figure D.11 Dust feeder23 Figure D.12 Dust feeder, details24 Table 1 Classification according to the filtration performances5 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:38
27、:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 779:1993 BSI 01-19993 1 Scope This European Standard refers to particulate air filters for general ventilation. These filters are classified according to their performance. This European Standard contains requirements to be met by particulate air fil
28、ters. It describes testing methods and the test rig for measuring the filter performance. The performance results obtained in accordance with this standard cannot by themselves be quantitatively applied to predict performance in service. In order to obtain results for comparison and classification p
29、urposes, particulate air filters shall be tested against an atmospheric aerosol and a synthetic test aerosol. This European Standard applies to air filters which are to be tested between an airflow rate of 0,24 m3/s (850 m3/h) and 1,39 m3/s (5 000 m3/h) and have an initial atmospheric dust spot effi
30、ciency lower than 98 %. 2 Normative reference This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent
31、amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EUROVENT 4/4, Sodium chloride aerosol test for fillers using flame photomet
32、ric technique. 3 Definitions and units For the purposes of this standard, the following definitions apply: 3.1 filters air cleaning filters used in general ventilation for removing particulate matter and tested according to this European Standard 3.2 test air outdoor air of the composition, temperat
33、ure, pressure and atmospheric dust concentration prevailing at the time of the test in the plenum chamber. The relative humidity of the air shall be controlled as stated in clause 6.3. When determining the synthetic dust weight arrestance, room air may also be used as test air 3.3 rated airflow rate
34、 the quantity of air the filter is designed to handle as specified by the manufacturer. Expressed in m3/s (for a reference air density of 1,20 kg/m3) 3.4 face area the area of the inside section of the test duct immediately upstream of the filter (without transformation pieces: nominal values 0,61 m
35、 0,61 m = 0,37 m2; with transformation pieces: nominal values W see Figure D.3) 3.5 face velocity the airflow rate divided by the face area. Expressed in m/s 3.6 net effective filtering area the total filtering surface area of the filter in contact with the test air. Expressed in m2 3.7 media veloci
36、ty the airflow rate divided by the net effective filtering area. Expressed in m/s 3.8 initial pressure drop the pressure drop of the clean filter operating at its rated airflow rate. Expressed in Pa (po) 3.9 final pressure drop the pressure drop up to which the filtration performance is measured for
37、 classification purposes (see 5.4.2). Expressed in Pa (pf) 3.10 atmospheric dust spot efficiency a measure of the ability of the filter to remove atmospheric dust from the test air. This efficiency is measured on a light transmission basis. Expressed as a % E 3.11 initial atmospheric dust spot effic
38、iency the first determined dust spot efficiency value before any synthetic dust is fed to the filter. Expressed as a % (EA) 3.12 average atmospheric dust spot efficiency the average of the dust spot efficiency values (see 6.5.2.1). Expressed as a % (Em) Licensed Copy: sheffieldun sheffieldun, na, Tu
39、e Nov 07 03:38:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 779:1993 4 BSI 01-1999 3.13 synthetic dust weight arrestance a measure of the ability of the filter to remove injected synthetic dust from the test air. This arrestance is calculated on a weight basis. Expressed as a % (A) 3.14 initial
40、synthetic dust weight arrestance the first dust weight arrestance obtained from a dust feed increment of 30 g. Expressed as a % (A1) 3.15 average synthetic dust weight arrestance the average of the values of synthetic dust weight arrestance (see 6.5.2.2). Expressed as a % (Am) 3.16 final air filter
41、the air filter used to collect the synthetic dust passing the filter 3.17 light transmission the proportion of incident light passed by a translucent material as compared with the incident flux. Expressed as a % 3.18 relative light transmission the light transmission of a sampling target relative to
42、 the light transmission of a translucent standard. Expressed as a % 3.19 dust spot opacity the decrease in relative light transmission of a dust spot sampling target resulting from the build-up of atmospheric dust on the target. Expressed as a % 3.20 dust-holding capacity (static dust-holding capaci
43、ty) the amount of synthetic dust fed to a disposable or non self-renewable filter multiplied by its average arrestance until one of the limiting conditions occurs. Expressed in g 4 Classification According to their filtration performances, filters are classified in groups and classes. 4.1 Group of f
44、ilters According to this standard filters are contained in one of the following groups: group G: coarse dust filters; group F: fine dust filters. 4.2 Classes of filters Filters of groups G and F are classified according to their performances (average synthetic dust weight arrestance or average atmos
45、pheric dust spot efficiency). See 5.5. Group G filters are subdivided in four classes: G1; G2; G3; G4. Group F filters are subdivided in five classes: F5; F6; F7; F8; F9. 5 Requirements 5.1 Generalities The filter shall be designed or marked so as to prevent incorrect mounting. The filter shall be d
46、esigned so that when correctly mounted in the ventilation duct, no leak occurs at the sealing edge. If, for any reason, dimensions do not allow testing of a filter under standard test conditions, assembly of two or more filters of the same type or model is permitted, provided no leaks occur in the r
47、esulting filter. 5.2 Materials The complete filter (filter and frame) shall be made of suitable material to withstand normal usage and exposures to those temperatures, humidities and corrosive environments that are likely to be encountered. The complete filter shall be designed so that it will withs
48、tand mechanical constraints that are likely to be encountered during normal use. Dust or fibres released from the filter media by the airflow through the filter shall not constitute a hazard or nuisance for the people (or devices) exposed to filtered air. 5.3 Rated airflow rate The filter(s) shall b
49、e tested at its rated airflow rate for which the filter has been designed by the manufacturer. (If the manufacturer does not notify any rated airflow rate, testing will be conducted at 0,94 m3/s (3 400 m3/h.) In no circumstances shall tests be made for airflows lower than 0,24 m3/s or higher than 1,39 m3/s. Measurement according to 6.1, 6.2. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:38:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 779:1993 BSI 01-19995 5.4 Pressure drop 5.4.1 I
链接地址:https://www.31doc.com/p-3744549.html