1、BRITISH STANDARD BS ISO 14269-4:1997 Tractors and self-propelled machines for agriculture and forestry Operator enclosure environment Part 4: Air filter element test method ICS 65.060.01BSISO14269-4:1997 This British Standard, having been prepared under the directionof the Engineering SectorBoard, w
2、as published underthe authority of the Standards Board and comes into effect on 15 May 1998 BSI 04-1999 ISBN 0 580 29854 X National foreword This British Standard reproduces verbatim ISO14269-4:1997 and implements it as the UK national standard. The UK participation in its preparation was entrusted
3、to Technical Committee AGE/6, Agricultural tractors and forestry machinery, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests infor
4、med; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in
5、this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. U
6、sers of British Standards are responsible for their correct application. Compliance 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, theISOtitle page, pageii, pages1 to7 a
7、nd a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO14269-4:1997 BSI 04-1999 i Contents Page National for
8、eword Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Air filter element performance test 1 Annex A (informative) Example of test report form for panel-type air filter 7 Figure 1 Test shroud 3 Figure 2 Test equipment setup 4 Figure 3 Dust feeder 5 Figure 4 Dust in
9、jector 6 Table 1 Chemical analysis of test dust 1 Table 2 Particle size distribution by volume 2 Table 3 Particle size distribution by mass 2ii blankBSISO14269-4:1997 ii BSI 04-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodi
10、es (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations
11、, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated
12、 to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO14269-4 was prepared by Technical Committee ISO/TC23, Tractors and machines for agriculture and forestry, Subcommittee SC2, Commo
13、n tests. This first edition, along with the other parts of ISO14269, cancels and replaces ISO3737:1976, ISO6097:1989 and ISO/TR8953:1987, which have been technically revised. ISO 14269 consists of the following parts, under the general title Tractors and self-propelled machines for agriculture and f
14、orestry Operator enclosure environment: Part 1: Vocabulary; Part 2: Heating, ventilation and air-conditioning test method and performance; Part 3: Determination of effect of solar heating; Part 4: Air filter element test method; Part 5: Pressurization system test method. Annex A of this part of ISO
15、14269 is for information only. Descriptors: Agricultural machinery, forest equipment, self-propelled machines, agricultural tractors, operating stations, operator enclosures, environments, working conditions, air filters, components, tests, performance tests.BSISO14269-4:1997 BSI 04-1999 1 1 Scope T
16、his part of ISO 14269 specifies a uniform test method for determining performance levels of operator enclosure panel-type air filters. It is applicable to tractors and self-propelled machines for agriculture and forestry when equipped with an operator enclosure with a ventilation system. 2 Normative
17、 references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO14269. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO14269
18、 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 5011:1988, Inlet air cleaning equipment for internal combustion engines and compressors Perf
19、ormance testing. ISO 14269-1:1997, Tractors and self-propelled machines for agriculture and forestry Operator enclosure environment Part 1: Vocabulary. 3 Definitions For the purposes of this part of ISO 14269, the definitions given in ISO14269-1 apply, of which the following are particularly relevan
20、t. 3.1 operator enclosure air filter element medium in which particulate matter is removed from the incoming air supply ISO14269-1:1997, definition2.15 3.2 filter efficiency ability of the air filter element to remove particulate matter ISO14269-1:1997, definition2.16 3.3 test dust particulate matte
21、r used to evaluate the filter element ISO14269-1:1997, definition2.17 4 Air filter element performance test The test shroud configurations for the operator enclosure filter comparison tests are given in4.1.1 andFigure 1. This test procedure also designates a recommended intake velocity for the dust
22、mixing chamber. (SeeISO 5011:1988, Figure 2.) 4.1 Test equipment and instruments 4.1.1 Test equipment in accordance withFigure 2, used to determine the resistance to air flow, particulate holding capacity, particulate removal efficiency, and sealing characteristics. For element configurations other
23、than panel type, see ISO5011. 4.1.2 Dust metering device in accordance with Figure 3 which, when used with the dust injector (Figure 4), is capable of metering dust over the range of delivery rates required. This dust feed system shall not change the primary particle size distribution of the particu
24、late. The average delivery rate shall be within5% of the desired rate and the deviation in the instantaneous delivery rate from the average shall be no more than5%. 4.2 Test conditions and material 4.2.1 All air flow measurements are to be corrected to a standard condition of25C at100kPa. 4.2.2 Test
25、 dust shall be standardized and shall be of two grades labelled fine and coarse. For typical particle size distribution and chemical composition, refer to Table 1,Table 2 andTable 3. It is difficult to select a test dust size distribution and concentration which will be representative of all service
26、 conditions; therefore, based primarily on practical considerations, the concentration shall be1g/m 3for coarse and fine dusts (1g/m 3is generally accepted as zero visibility conditions). Table 1 Chemical analysis of test dust Chemical Amount % (m/m) SiO 2 67-69 Fe 2 O 3 3-5 Al 2 O 3 15-17 CaO 2-4 M
27、gO 0,5-1,5 Total alkalis 3-5 Ignition loss 2-3BSISO14269-4:1997 2 BSI 04-1999 Table 2 Particle size distribution by volume Table 3 Particle size distribution by mass 4.2.3 The absolute filter shall consist of fiberglass media with a minimum thickness of12,7mm and a minimum density of9,5kg/m 3 . The
28、fiber diameter shall be0,764m to1,274m and the moisture absorption shall be less than1% by weight after exposure of50C and95% relative humidity for96h. The filter shall be installed with the nap side facing upstream in an air-tight holder that adequately supports the media. The face velocity shall n
29、ot exceed50m/min to maintain media integrity. 4.2.4 The mass of the absolute filter shall be measured to the nearest0,01g after the weight has stabilized and while in a ventilation oven at105C5C. If stabilization cannot be determined, the filter shall remain in the oven for at least4h. 4.2.5 All tes
30、ts shall be conducted with air entering the air filter at a temperature of24C 8C and a relative humidity of (50 15)%. NOTESince atmospheric conditions affect test results, when comparing performance of filters designed for the same application, tests should be conducted within the narrowest range of
31、 temperature and humidity possible. 4.2.6 The velocity of the air entering the top of the dust mixing chamber shall be a minimum of6m/s (seeFigure 1). 4.2.7 Air flow restriction and pressure drop test shall be conducted using a minimum of three points:80%,100% and120% of rated air flow, using the el
32、ement restriction test setup shown inFigure 2. Condition the unit to be tested for at least30min under temperature and humidity conditions equivalent to those of the test area. 4.2.8 The air filter efficiency, E, as a percentage, is calculated as follows: where Size Fine grade Coarse grade 4m % (V/V
33、) max. % (V/V) max. 5,5 38 3 13 3 11 54 3 24 3 22 71 3 37 3 44 89 3 56 3 88 97 3 84 3 125 100 100 Dimension d Fine grade Coarse grade 4m % (m/m) max. % (m/m) max. 0 d 5 39 2 12 2 5 d 10 18 3 12 3 10 d 20 16 3 14 3 20 d 40 18 3 23 3 40 d 80 9 3 30 3 80 d 200 0 9 3 m f is the increase in mass of the f
34、ilter element under test; m A is the increase in mass of the absolute filter. E m f m f m A + - 100 =BSISO14269-4:1997 BSI 04-1999 3 Figure 1 Test shroudBSISO14269-4:1997 4 BSI 04-1999 Figure 2 Test equipment setupBSISO14269-4:1997 BSI 04-1999 5 Figure 3 Dust feederBSISO14269-4:1997 6 BSI 04-1999 Fi
35、gure 4 Dust injectorBSISO14269-4:1997 BSI 04-1999 7 Annex A (informative) Example of test report form for panel-type air filterBS ISO 14269-4:1997 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards.
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