1、BRITISH STANDARD BS ISO 19438:2003 Diesel fuel and petrol filters for internal combustion engines Filtration efficiency using particle counting and contaminant retention capacity ICS 43.060.40 BS ISO 19438:2003 This British Standard was published under the authority of the Standards Policy and Strat
2、egy Committee on 7 January 2004 BSI 7 January 2004 ISBN 0 580 43171 1 National foreword This British Standard reproduces verbatim ISO 19438:2003 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee MCE/21, Filters for gases and l
3、iquids, to Subcommittee MCE/21/6, Filters for volatile liquid fuels, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in
4、 this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a
5、 contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or propos
6、als for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 38, an inside back cov
7、er and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 19438:2003(E)INTERNATIONAL ADNATSDR ISO 18349 tide tsriFino -300210-11 Diesel fuel and petrol filters
8、for internal combustion engines Filtration efficiency using particle counting and contaminant retention capacity Filtres carburant, essence ou diesel, pour moteurs combustion interne Efficacit de filtration par comptage des particules et capacit de rtention Referecne unbmer OSI 83491:002)E(3 OSI 300
9、2INTERNATIONAL STANDARD ISO 19438 First edition 2003-11-01 f leseiDua ledn lortep tliff sreonretni rla mocsuboitn nesenig liF titarno eiciffency nisug oc elcitrapitnugn adn tnocimannater teitnac noicapty Frtlies carrubnase ,tscneuo e idse,le ruop tomrues cosubmtino retnin e Effcicatied ifrtlanoit ra
10、p coatpmeg sed rapticusel c teacapti r edetitnno BSISO19438:2003 ii BSISO19438:2003 iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 2 4 Symbols . 2 5 Test equipment and materials . 2 5.1 Test equipment 2 5.2 Test materials 5 6 Accuracy of mea
11、suring instruments and test conditions 5 7 Test rig validation . 6 7.1 General. 6 7.2 Validation of the on-line dilution and particle counting system 6 7.3 Validation of filter test circuit 6 7.4 Validation of contaminant injection circuit 7 8 Preliminary preparation 7 8.1 Test filter assembly. 7 8.
12、2 Contaminant injection circuit 7 8.3 Filter test circuit 9 9 Test procedure 9 9.1 Initial procedure 9 9.2 Filter test 11 10 Calculation and reporting of test results 12 10.1 Test report . 12 10.2 Calculation. 12 Annex A (normative) Specification of test fluid for filter test 15 Annex B (informative
13、) Typical filter test report, presentation of test results. 17 Annex C (informative) Example filter efficiency calculations 22 Annex D (informative) Summary of the International interlaboratory trial (“round robin”) to validate ISO 19438 protocol . 26 Bibliography . 38 BSISO19438:2003iv Foreword ISO
14、 (the International Organization for Standardization) is a worldwide federation of national standards bodies (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 com
15、mittee has been established has the right to be represented on that committee. International organizations, 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 electrot
16、echnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the mem
17、ber bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identify
18、ing any or all such patent rights. ISO 19438 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 7, Injection equipment and filters for use on road vehicles. It is intended that ISO 19438 replace ISO/TS 13353:2002 when that document is reviewed after three years. BSISO19438
19、:2003 vIntroduction An interlaboratory trial was conducted using ISO 19438 by six laboratories in 2002. Typical filters were evaluated and results for filtration efficiencies and retention capacities analysed to deduce repeatability, reproducibility and coefficient of variation of the method. Initia
20、l filtration efficiency results were found to closely correlate to those obtained through the method specified in ISO/TS 13353, thus making the method given in that Technical Specification redundant. A summary of the results is given in Annex D. BSISO19438:2003blankINTENRATIONAL TSANDADR IS:83491 O3
21、002(E)1Diesel fuel and petrol filters for internal combustion engines Filtration efficiency using particle counting and contaminant retention capacity 1 Scope This International Standard specifies a multi-pass filtration test, with continuous contaminant injection and using the on-line particle coun
22、ting method, for evaluating the performance of diesel fuel and petrol filters for internal combustion engines submitted to a constant flow rate of test liquid. The test procedure determines the contaminant capacity of a filter, its particulate removal characteristics and differential pressure. This
23、International Standard is applicable to filter elements having a rated flow of between 50 l/h and 800 l/h; however, by agreement between filter manufacturer and customer, and with some modification, the procedure is permitted for application to fuel filters with higher flow rates. 2 Normative refere
24、nces 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. ISO 1219-1:1991, Fluid power systems and com
25、ponents Graphic symbols and circuit diagrams Part 1: Graphic symbols ISO 2942:1994, Hydraulic fluid power Filter elements Verification of fabrication integrity and determination of the first bubble point ISO 3968:2001, Hydraulic fluid power Filters Evaluation of differential pressure versus flow cha
26、racteristics ISO 4021:1992, Hydraulic fluid power Particulate contamination analysis Extraction of fluid samples from lines of an operating system ISO 11171:1999, Hydraulic fluid power Calibration of automatic particle counters for liquids ISO 4405:1991, Hydraulic fluid power Fluid contamination Det
27、ermination of particulate contamination by the gravimetric method ISO 11841-1, Road vehicles and internal combustion engines Filter vocabulary Part 1: Definitions of filters and filter components ISO 11841-2, Road vehicles and internal combustion engines Filter vocabulary Part 2: Definitions of char
28、acteristics of filters and their components ISO 11943:1999, Hydraulic fluid power On-line automatic particle-counting systems Method of calibration and validation ISO 12103-1:1997, Road vehicles Test dust for filter evaluation Part 1: Arizona test dust BSISO19438:20032 3 Terms and definitions For th
29、e purposes of this document, the terms and definitions given in ISO 11841-1 and ISO 11841-2 and the following apply. 3.1 multipass test test which requires the recirculation of filtered fluid through the filter element 3.2 base upstream gravimetric level upstream contaminant concentration if no cont
30、aminant is recirculated 3.3 filtration efficiency ability of the filter to retain particles expressed as the percentage of particles of a given size retained by the filter under test 3.4 overall efficiency efficiency calculated from the average upstream and downstream particle counts obtained during
31、 the entire test 3.5 filter rating particle size corresponding to an initial efficiency or cumulative overall efficiency of a given percentage NOTE It is expressed in micrometres(c) m(c), which signifies throughout this International Standard that a particle size measurement is carried out using an
32、automatic particle counter calibrated in accordance with ISO 11171. 3.6 filter reference rating filter rating at 99 % efficiency NOTE It is expressed in micrometres(c) m(c), which signifies throughout this International Standard that a particle size measurement is carried out using an automatic part
33、icle counter calibrated in accordance with ISO 11171. 3.7 initial efficiency efficiency at first data points calculated from 4 min, 5 min and 6 min particle counts 4 Symbols Graphical symbols used in this International Standard for fluid power system components are in accordance with ISO 1219-1. 5 T
34、est equipment and materials 5.1 Test equipment 5.1.1 Test rig The test rig, shown diagrammatically in Figure 1 (to which the numbers in parentheses throughout this International Standard refer), shall comprise the following. BSISO19438:2003 35.1.1.1 Filter test circuit, including the components spec
35、ified in 5.1.1.1.1 to 5.1.1.1.7. 5.1.1.1.1 Reservoir (1), constructed with a conical bottom having an included angle of not more than 90 and where the oil entering is diffused below the fluid surface. 5.1.1.1.2 Oil pump (2), which does not alter the contaminant particle size distribution and does no
36、t exhibit pressure pulsation with an amplitude greater than 10 % of the average pressure at the filter inlet. 5.1.1.1.3 Device, such as a filter head to accommodate spin-on filters, which connects the test filter (6) and which can be by-passed or replaced by a straight section of pipe. 5.1.1.1.4 Sys
37、tem clean-up filter (9), capable of providing an initial system contamination level of less than 15 particles/ml having a size greater than 10 m(c). 5.1.1.1.5 Sampling valves, in accordance with ISO 4021, for turbulent sampling upstream and downstream of the test filter, for on-line particle countin
38、g (18) and for gravimetric analysis (11). 5.1.1.1.6 Pressure tappings, in accordance with ISO 3968. 5.1.1.1.7 Piping, sized to ensure that turbulent mixing conditions exist throughout the filter test circuit. 5.1.1.2 Contaminant injection circuit, including the components specified in 5.1.1.2.1 to 5
39、.1.1.2.3. 5.1.1.2.1 Reservoir (12), constructed with a conical bottom having an included angle of not more than 90 and where the oil entering is diffused below the fluid surface. 5.1.1.2.2 Oil pump (13), of centrifugal or other type, which does not alter the contaminant particle size distribution. 5
40、.1.1.2.3 System clean-up filter (14), capable of providing either of the following conditions: a) an initial system contamination level of less than 1 000 particles/ml having a size greater than 10 m(c); b) a gravimetric level less than 2 % of the calculated level at which the test is being conducte
41、d, measured using the double membrane gravimetric method in accordance with ISO 4405. 5.1.1.2.4 Piping, sized to ensure that turbulent mixing conditions exist throughout the contaminant injection circuit. While injection flows lower than 0,25 l/min may be used if validated, an injection flow of 0,25
42、 l/min is recommended. Injection flows higher than 0,25 l/min shall not be used to minimize the effect of fluid extraction on filter capacity. BSISO19438:20034 Key 1 reservoir incorporating thermostatically controlled heater 13 circulation pump 2 test pump 14 clean-up filter A contaminant injection
43、circuit 3 three-way ball valve 15 heat exchanger B filter test circuit 4 pressure gauge 16 injection pump 5 differential pressure gauge 17 flow meter C dilution and counting system 6 test filter 18 sampling valve 7 throttle valve (for flow regulation) 19 dilution system 8 flow meter 20 particle coun
44、ter sensor 9 clean-up filter 21 particle counter 10 heat exchanger 22 sampling valve 11 sampling valve 23 by-pass flow circuit 12 reservoir incorporating thermostatically controlled heater Figure 1 Diagrammatic arrangement of test rig 5.1.2 On-line dilution and particle counting system The on-line d
45、ilution and particle counting system shall be in accordance with ISO 11943 and include the components specified in 5.1.2.1 to 5.1.2.4. 5.1.2.1 On-line sample delivery pipework, sized to maintain a fluid velocity that prevents silting at a flow rate of 0,125 l/min. For tests with sampling flows 10 %
46、of the total filter flow rate, the amount of dust discarded in the sampling flow will be significant. This amount shall be evaluated and deducted from the retained capacity. Lower flow rates may be used provided they are validated. 5.1.2.2 Dilution system (19), comprising appropriate reservoir, pump
47、, clean-up filters, flow meters and flow regulation valves. BSISO19438:2003 55.1.2.3 Two optical particle sensors (20), connected to a particle counter (21) having a minimum of five channels. 5.1.2.4 Timer, capable of measuring minutes and seconds. 5.2 Test materials 5.2.1 Test contaminant 5.2.1.1 C
48、ontaminant grade The contaminant shall be in accordance with the specification of ISO 12103-A3 medium grade test dust. 5.2.1.2 Contaminant preparation The test dust shall be pre-dried in quantities no larger than 200 g for at least 1 h at (105 5) C and cooled to room temperature. Maintain in a desic
49、cator until required for use. 5.2.2 Test fluid The test fluid shall have a petroleum base and conform to the specifications given in Annex A. 6 Accuracy of measuring instruments and test conditions The measuring instruments shall be capable of measuring to the levels of accuracy given in Table 1. The last column in the table gives the limits within which the test conditions shall be maintained. Table 1 Instrument accur
