1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 7403-12:2000 ISO 4548-
2、12:2000 ICS 21.260; 27.020 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Methods of test for full-flow lubricating oil filters for internal combustion engines Part 12: Filtration efficiency using particle counting, and contaminant retention capacityThis British Standard, hav
3、ing been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 May 2000 BSI 05-2000 ISBN 0 580 34284 0 BS 7403-12:2000 Amendments issued since publication Amd. No. Date Comments National foreword Thi
4、s British Standard reproduces verbatim ISO 4548-12:2000 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 liquids, to Subcommittee MCE/21/5, Filters for lubricating oil, which has the responsibili
5、ty 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 informed; monitor related international and European developments and promulgate them in the UK. A list of
6、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 this document may be found in the BSI Standards Catalogue under the section entitled “International Standards C
7、orrespondence 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. Users of British Standards are responsible for their correct application. Compliance with a British Standard doe
8、s not of itself confer immunity from legal obligations. 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 26, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates
9、when the document was last issued.Referencenumber ISO4548-12:2000(E) INTERNATIONAL STANDARD ISO 4548-12 Firstedition 2000-02-15 Methodsoftestforfull-flowlubricatingoil filtersforinternalcombustionengines Part12: Filtrationefficiencyusingparticlecounting, andcontaminantretentioncapacity Mthodes dessa
10、i des filtres huile de lubrification plein dbit pour les moteurs combustion interne Partie 12: Efficacit de filtration par comptage des particules et capacit de rtention des contaminants BS 7403-12:2000ii BS 7403-12:2000 iii Contents Page Foreword.iv Introduction.v 1 Scope1 2 Normativereferences1 3
11、Termsanddefinitions.2 4 Symbols2 5 Equipment2 6 Materials.5 7 Accuracyofmeasuringinstrumentsandtestconditions.5 8 Testrigvalidation5 9 Preliminarypreparation7 10 Testprocedure.9 11 Calculations11 12 Testreport13 AnnexA(normative)Specificationoftestfluidforoilfiltertest.14 AnnexB(informative)Typicalf
12、iltertestreport16 AnnexC(normative)Filterefficiencycalculations22 Bibliography26 BS 7403-12:2000iv Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechn
13、ical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Comm
14、ission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStandardrequiresapproval
15、byatleast75%ofthememberbodiescastingavote. AttentionisdrawntothepossibilitythatsomeoftheelementsofthispartofISO4548maybethesubjectofpatent rights.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights. InternationalStandardISO4548-12waspreparedbyTechnicalCommitteeISO/TC70, Internal combu
16、stion engines, Subcommittee SC 7, Tests for lubricating oil filters. ISO4548consistsofthefollowingparts,underthegeneraltitle Methods of test for full-flow lubricating oil filters for internal combustion engines: Part 1: Differential pressure/flow characteristics Part 2: Element by-pass valve charact
17、eristics Part 3: Resistance to high differential pressure and to elevated temperature Part 4: Initial particle retention efficiency, life and cumulative efficiency (gravimetric method) Part 5: Cold start simulation and hydraulic pulse durability test Part 6: Static burst pressure test Part 7: Vibrat
18、ion fatigue test Part 9: Inlet and outlet anti-drain valve tests Part 10: Life and cumulative efficiency in the presence of water in oil Part 11: Self-cleaning filters Part 12: Filtration efficiency using particle counting, and contaminant retention capacity AnnexesAandCformanormativepartofthisparto
19、fISO4548.AnnexBisforinformationonly. BS 7403-12:2000 v Introduction ISO4548establishesstandardtestproceduresformeasuringtheperformanceoffull-flowlubricatingoilfiltersfor internalcombustionengines.Ithasbeenpreparedinseparateparts,eachpartrelatingtoaparticularperformance characteristic. Togetherthetes
20、tsprovidetheinformationnecessarytoassessthecharacteristicsofafilter,butifagreedbetween thepurchaserandthemanufacturer,thetestsmaybeconductedseparately. BS 7403-12:2000BS 7403-12:2000 1 Methodsoftestforfull-flowlubricatingoilfiltersforinternal combustionengines Part12: Filtrationefficiencyusingpartic
21、lecounting,andcontaminant retentioncapacity 1 Scope ThispartofISO4548specifiesamulti-passfiltrationtestwithcontinuouscontaminantinjectionandusingtheon- lineparticlecountingmethodforevaluatingtheperformanceoffull-flowlubricatingoilfiltersforinternalcombustion engines. Thetestproceduredeterminesthecon
22、taminantcapacityofafilter,itsparticulateremovalcharacteristicsand differentialpressure. Thistestisintendedforapplicationtofilterelementshavingaratedflowbetween4l/minand600l/minandwithan efficiencyoflessthan99%ataparticlesizegreaterthan10 m. NOTE Severaltestflowloopsbuiltintoonetestrig,orseveraltestr
23、igs,wouldberequiredtocoverthecompleteflowrange of4l/minto600l/min. 2 Normativereferences Thefollowingnormativedocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsof thispartofISO4548.Fordatedreferences,subsequentamendmentsto,orrevisionsof,anyofthesepublications donotapply.
24、However,partiestoagreementsbasedonthispartofISO4548areencouragedtoinvestigatethe possibilityofapplyingthemostrecenteditionsofthenormativedocumentsindicatedbelow.Forundated references,thelatesteditionofthenormativedocumentreferredtoapplies.MembersofISOandIECmaintain registersofcurrentlyvalidInternati
25、onalStandards. ISO1219-1:1991, Fluid power systems and components Graphic symbols and circuit diagrams Part 1: Graphic symbols. ISO2942:1994, Hydraulic fluid power Filter elements Verification of fabrication integrity and determination of the first bubble point. ISO3968:1981, Hydraulic fluid power F
26、ilters Evaluation of pressure drop versus flow characteristics. ISO4021:1992, Hydraulic fluid power Particulate contamination analysis Extraction of fluid samples from lines of an operating system. ISO4405:1991, Hydraulic fluid power Fluid contamination Determination of particulate contamination by
27、the gravimetric method. BS 7403-12:20002 ISO11171:1999, Hydraulic fluid power Calibration of automatic particle counters for liquids. ISO11841-1: 1) , Road vehicles and internal combustion engines Filter vocabulary Part 1: Definitions of filters and filter components. ISO11841-2: 1) , Road vehicles
28、and internal combustion engines Filter vocabulary Part 2: Definitions of characteristics of filters and their components. ISO11943:1999, Hydraulic fluid power On-line automatic particle-counting systems for liquids Methods of calibration and validation. ISO12103-1:1997, Road vehicles Test dust for f
29、ilter evaluation Part 1: Arizona test dust. 3 Termsanddefinitions ForthepurposesofthispartofISO4548,thetermsanddefinitionsgiveninISO11841-1andISO11841-2, togetherwiththefollowing,apply. 3.1 multi-passtest testwhichrequirestherecirculationofunfilteredfluidthroughthefilterelement 3.2 baseupstreamgravi
30、metriclevel upstreamcontaminantconcentrationifnocontaminantisrecirculated 3.3 filtrationefficiency abilityofthefiltertoretainparticlesexpressedasthepercentageofparticlesofagivensizeretainedbythefilter undertest 3.4 overallefficiency efficiencycalculatedfromtheaverageupstreamanddownstreamparticlecoun
31、ts 3.5 X%micron 2) ( m)rating particlesize,inmicrometres,correspondingtoanoverallefficiencyofagivenpercentageX 4 Symbols ThegraphicalsymbolsusedinthispartofISO4548areinaccordancewithISO1219-1. 5 Equipment 5.1 Testrig Thetestrigshallcompriseafiltertestcircuitandacontaminantinjectioncircuit,asdescribe
32、din5.1.1and5.1.2. SeeFigure1. 1)Tobepublished. 2)1micron 1micrometre. BS 7403-12:2000 3 Key 1 Reservoirincorporatingathermostaticallycontrolled heater 12Reservoirincorporatingathermostaticallycontrolled heater 2 Pump 13Pump 3 Three-wayvalve 14Clean-upfilter 4 Pressuregauge 15Heatexchanger 5 Differen
33、tialpressuregauge 16Injectionpump 6 Testfilter 17Flowmeter 7 Throttlevalve(forpressureregulation) 18Samplingvalve 8 Flowmeter 19Dilutionsystem 9 Clean-upfilter 20Particlesensor 10Heatexchanger 21Particlecounter 11Samplingvalve 22Volumecontrolvalve A Contaminantinjectioncircuit B Filtertestcircuit C
34、Dilutionandcountingsystem Figure1Diagrammaticarrangementoftestrig BS 7403-12:20004 5.1.1 Filtertestcircuit Thefiltertestcircuitshallincludethefollowingcomponents. a) Reservoir(1)constructedwithaconicalbottomhavinganincludedangleofnotmorethan90andwherethe oilenteringisdiffusedbelowthefluidsurface. b)
35、 Oilpump(2)whichdoesnotalterthecontaminantparticlesizedistributionandwhichdoesnotexhibit excessiveflowpulses. c) Device,suchasafilterheadtoaccommodatespin-onfilters,toconnectthetestfilter(6)whichcanbeby- passedorreplacedbyastraightsectionofpipe. d) Systemclean-upfilter(9)capableofprovidinganinitials
36、ystemcontaminationleveloflessthan15particles greaterthan10m/ml. e) SamplingvalvesinaccordancewithISO4021,forturbulentsamplingupstreamanddownstreamofthetest filter,foron-lineparticlecounting(18)andforgravimetricanalysis(11). f) PressuretappingsinaccordancewithISO3968. g) Pipingsizedtoensurethatturbul
37、entmixingconditionsexistthroughoutthefiltertestcircuit. 5.1.2 Contaminantinjectioncircuit Thecontaminantinjectioncircuitshallincludethefollowingcomponents: a) Reservoir(12)constructedwithaconicalbottomhavinganincludedangleofnotmorethan90andwherethe oilenteringisdiffusedbelowthefluidsurface. b) Oilpu
38、mp(13),centrifugalorofanothertypewhichdoesnotalterthecontaminantparticlesizedistribution. c) Systemclean-upfilter(14)capableofprovidingeitherofthefollowingconditions: 1) aninitialsystemcontaminationleveloflessthan1000particles/mlhavingasizegreaterthan10m; 2) agravimetriclevellessthan2%ofthecalculate
39、dlevelatwhichthetestisbeingconducted,measuredin accordancewiththedoublemembranegravimetricmethoddescribedinISO4405. d) Pipingsizedtoensurethatturbulentmixingconditionsexistthroughoutthecontaminantinjectioncircuit. 5.2 On-linedilutionandparticlecountingsystem Theon-linedilutionandparticlecountingsyst
40、emshallincludethefollowingcomponents: a) On-linesampledeliverypipeworksizedtomaintainafluidvelocitywhichwillpreventsilting. b) Dilutionsystem(19)comprisingareservoir,pump,clean-upfilters,flowmetersandflowregulationvalves. c) Twoopticalparticlesensors(20)connectedtoacounter(21)havingaminimumoffivecha
41、nnels. 5.3 Timer,capableofmeasuringminutesandseconds. BS 7403-12:2000 5 6 Materials 6.1 Testcontaminant 6.1.1 Contaminantgrade ThecontaminantshallbeinaccordancewiththespecificationgivenforISO12103-A3mediumgradetestdustin ISO12103-1:1997. 6.1.2 Contaminantpreparation Thetestdustshallbepre-driedinquan
42、titiesnolargerthan200gforatleast1hat105C 5 C,cooledtoroom temperatureandmaintainedinadesiccatoruntilrequiredforuse. 6.2 Testfluid,havingapetroleumbaseandconformingtothespecificationsgiveninannexA. 7 Accuracyofmeasuringinstrumentsandtestconditions Themeasuringinstrumentsshallbecapableofmeasuringtothe
43、levelsofaccuracygiveninTable1.Thelast columninthetablegivesthelimitswithinwhichthetestconditionsshallbemaintained. Table1Instrumentaccuracyandtestconditionvariation Testcondition Units Measurementaccuracy Allowedtest conditionvariation Flow l/min 2% 5% Pressure Pa 5% Temperature C 1 C 2 C Volume l 5
44、% 10% Baseupstream gravimetriclevel mg/l 1mg/l Conductivity pS/m 10% Viscosity a mm 2 /s 5% a Theviscosityofthetestliquidshouldbecheckedatregularintervalstoensurethatthetestis conductedataliquidtemperaturewhichcorrespondstoaviscosityof15mm 2 /sec 1mm 2 /sec. 8 Testrigvalidation NOTE Thesevalidationp
45、roceduresrevealtheeffectivenessofthetestriginmaintainingcontaminantentrainmentand/or preventingcontaminantsizemodification. 8.1 Validationoffiltertestcircuit 8.1.1 Validatethefiltertestcircuitattheminimumflowrateatwhichthecircuitwillbeoperated.Installastraight sectionofpipeinplaceofatestfilterduring
46、thevalidationprocedure. 8.1.2 Forflowsoflessthan60l/min,adjustthetotalcircuitvolumetobenumericallyequaltoone-halfofthe valueoftheminimumflowvolumeperminutethroughthefilter,withaminimumof6l.Forflowshigherthan60 l/min,adjustthetotalcircuitvolumetobenumericallyequaltoone-quarterofthevalueoftheminimumfl
47、owvolume perminutethroughthefilter. BS 7403-12:20006 8.1.3 Contaminatethefluidtothecalculatedgravimetriclevelof5mg/lusingISO12103-A3testdust. NOTE Thiscontaminationlevelisbelowthecoincidencelimitofautomaticparticlecounters. 8.1.4 Circulatethefluidinthetestsystemfor1hwhilstobtainingdownstreamcumulati
48、vecountsat10mand 20mwithouton-linedilutionat10minsampleintervals. 8.1.5 Calculateandrecordtheon-linecount(C o )inparticles/ml,usingtheequation C N V o c where N c isthecumulativecountfortheselectedsampleperiod,innumberofparticles; V isthevolumeoffluid,inmillilitres,passedthroughtheparticlecountersen
49、sorduringthesampleperiod. 8.1.6 Acceptthevalidationtestonlyif: eachparticlecountobtainedat10mand20mdoesnotdeviatebymorethan10%fromtheaverage particlecountsforthesesizes; theaverageforallparticlecountspermillilitreatchannel 10misnotlessthan750normorethan1000; theparticlecountspermillilitreatchannel20marenotlessthan70normorethan120. 8.2 Validationofcontaminantinjectioncircuit 8.2.1 Validatethecontaminantinjectioncircuitatthemaximumvolumeandthemaximu
