1、BSI Standards PublicationBS ISO 14085-1:2015Aerospace series Hydraulicfilter elements Test methodsPart 1: Test sequenceBS ISO 14085-1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 14085-1:2015. The UK participation in its preparation was entrusted to Tec
2、hnicalCommittee ACE/69, Aerospace hydraulic systems, fluids and components.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 necessary provisions of a contract. Users are responsible for its correct
3、application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 80577 6 ICS 49.080 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy C
4、ommittee on 31 March 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e d ISO 2015Aerospace series Hydraulic filter elements Test methods Part 1: Test sequenceSrie arospatiale Elments filtrants hydrauliques Mthode dessais Partie 1: Squence dessaisINTERNATIONAL STANDARDISO
5、14085-1First edition 2015-03-01Reference number ISO 14085-1:2015(E)BS ISO 14085-1:2015ISO 14085-1:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any for
6、m or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 C
7、H-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 14085-1:2015ISO 14085-1:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Test equipment and materials . 15 Accuracy of measur
8、ing instruments and test conditions . 16 Test sample . 17 Summary of information required prior to testing 28 Test methods . 28.1 1st step Fabrication integrity test and 1st bubble point value . 28.2 2nd step Identification and marking 28.3 3rd step Test sequence . 29 Data presentation 210 Acceptanc
9、e criteria or data to be reported . 511 Identification statement . 5Bibliography 6 ISO 2015 All rights reserved iiiContents PageBS ISO 14085-1:2015ISO 14085-1:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bo
10、dies). 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, governmental an
11、d 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.The procedures used to develop this document and those intended for its further maintenance are de
12、scribed in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn
13、 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 identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on th
14、e ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
15、 as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationISO 14085-1 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 10, Aerospace fluid systems a
16、nd components.ISO 14085 consists of the following parts, under the general title Aerospace series Hydraulic Filter elements Test methods : Part 1: Test sequence Part 2: Conditioning Part 3: Filtration efficiency and retention capacity Part 4: Verification of collapse/burst pressure rating Part 5: Re
17、sistance to flow fatigue Part 6: Initial cleanliness leveliv ISO 2015 All rights reservedBS ISO 14085-1:2015ISO 14085-1:2015(E)IntroductionIn aerospace hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure. The liquid is both a lubricant and power-transmi
18、tting medium. The presence of solid contaminant particles in the liquid interferes with the ability of the hydraulic fluid to lubricate and causes wear and malfunction of the components. The extent of contamination in the fluid has a direct bearing in the performance, reliability, and safety of the
19、system, and needs to be controlled to levels that are considered appropriate for the system concerned.Filters are used to control the contamination level of the fluid by removing solid contaminant particles, typically consisting of a filter element enclosed in a filter housing. The filter element is
20、 the porous device that performs the actual process of filtration. The complete assembly is designated as a filter.Filter element performance is measured by testing, and a series of International Standards have been developed to quantify performance under specified conditions (see Clause 2). To prov
21、ide a greater level of assurance for a filter elements fitness for duty, a verification test program is intended to be based on most of these International Standards. This test sequence has been developed to fulfill that requirement.The purpose of this part of ISO 14085 is to define a sequence of te
22、sting and provide guidelines for acceptance criteria. ISO 2015 All rights reserved vBS ISO 14085-1:2015BS ISO 14085-1:2015Aerospace series Hydraulic filter elements Test methods Part 1: Test sequence1 ScopeThis part of ISO 14085 specifies a test sequence for evaluation of characteristics of the hydr
23、aulic fluid filter elements under standard conditions.This part of ISO 14085 is not intended to qualify a filter element under replicate conditions of service; this can only be done by a specific test protocol developed for the purpose, including actual conditions of use, for example the operating f
24、luid or contamination.The tests data resulting from application of this part of ISO 14085 can be used to compare the performance of aerospace hydraulic filter elements.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensabl
25、e for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 2942, Hydraulic fluid power Filter elements Verification of fabrication integrity and determination of the first b
26、ubble pointISO 5598, Fluid power systems and components Vocabulary3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 5598 apply.4 Test equipment and materialsTest equipment and material are those specified in each individual part of this International St
27、andard.5 Accuracy of measuring instruments and test conditionsAccuracy of measuring instruments and test conditions are described in each individual part of this International Standard.6 Test sampleThe filter elements selected for the evaluation testing shall be representative production stock of th
28、e same part number and date of build and/or manufacturing lot.Select at least three filter elements, as some of the tests are destructive and the elements cannot be used for further testing following these tests.INTERNATIONAL STANDARD ISO 14085-1:2015(E) ISO 2015 All rights reserved 1BS ISO 14085-1:
29、2015ISO 14085-1:2015(E)7 Summary of information required prior to testingPrior to applying the requirements of this part of ISO 14085 to a particular hydraulic filter element, establish the fabrication integrity bubble point (BP) value specified by the manufacturer as per ISO 2942.8 Test methods8.1
30、1st step Fabrication integrity test and 1st bubble point valueVerify the fabrication integrity of each of the three filter elements in accordance with ISO 2942 and disqualify from further testing any filter elements failing to comply with the fabrication integrity value.NOTE In the instance of disqu
31、alification of any of the three filter elements, replace the filter element with another of the same part number and issue.Record the pressure value at which the first bubble stream occurs for each filter element tested. For those that fail the minimum bubble point, designate as “Fail x Pa”, where x
32、 is the minimum value.Dry the filter elements.CAUTION Take care when drying elements that have been tested using a volatile solvent because of potential explosion and vapor inhalation risks. Comply with local health and safety regulations and use good laboratory practice.8.2 2nd step Identification
33、and markingSort the elements that have passed the criteria in 8.1 in accordance with their 1st bubble point value.a) 1stelement: lowest bubble point.b) 2ndelement: highest bubble point.c) 3rdelement: middle bubble point.Mark the filter elements in a suitable location and using a suitable method, ens
34、uring that the identification marks chosen do not conflict with other markings on the filter elements, and will not come off.8.3 3rd step Test sequenceThe tests shall be performed on the three filter elements. Perform the test sequence as described in Figure 1, Figure 2 and Figure 3.A test on an ele
35、ment can only be continued if the previous test was successful.In the case of the first filter element (lowest bubble point), the collapse/burst test need only be performed if the collapse/burst differential pressure requirement is greater than the differential pressure used in the conditioning test
36、.The order of testing of the filter elements shall be selected by the test laboratory.Each set of tests can be performed independently.9 Data presentationPresent all results of each test in the format proposed in the relevant test method.2 ISO 2015 All rights reservedBS ISO 14085-1:2015ISO 14085-1:2
37、015(E)ISO 3968Pressure dropPart 2ConditioningPart 4Collapse/burst(if required)Part 3efg976iciencysteady g976lowFirst g976ilter element(lowest BP)StoptestStoptestStoptestfailedPassStoptestPass FailFail PassFailPassPassFailFigure 1 First filter element test sequencePart 5Flow fatiguePart 2Conditioning
38、Part 3Short efg976iciecysteady g976lowSecond g976ilterelement(highest BP)StoptestStoptestPassStoptestfailedPass FailFail PassFailPassFigure 2 Second filter element test sequence ISO 2015 All rights reserved 3BS ISO 14085-1:2015ISO 14085-1:2015(E)Part 2ConditioningPart 6InitialcleanlinessPart 3Efg976
39、iciencycyclic g976lowThird g976ilter element(middle BP)StoptestStoptestPassStoptestfailedPass FailFail PassFailPassFigure 3 Third filter element test sequence4 ISO 2015 All rights reservedBS ISO 14085-1:2015ISO 14085-1:2015(E)10 Acceptance criteria or data to be reportedSee Table 1 for acceptance cr
40、iteria or data to be reported.Table 1 Summary of tests performed and acceptance criteria or data to be reportedTest method Reference standard1st Filter Element2nd Filter Element3rd Filter ElementBubble point ISO 2942 Pass/failValue: Pass/ failValue: Pass/failValue:Conditioning ISO 14085-2 Pass/fail
41、Pass/fail Pass/failPressure drop ISO 3968 Pass/failValue: Efficiency - steady flow ISO 14085-3 Pass/failValue: Pass/ failValue: Retention capacity ISO 14085-3 Pass/failValue: Burst/collapse ISO 14085-4 Pass/fail Flow fatigue ISO 14085-5 Pass/fail Cleanliness level ISO 14085-6 Pass/failValue:Efficien
42、cy - cyclic flow ISO 14085-3 Pass/failValue:11 Identification statementUse the following statement in test reports, catalogues, and sales literature when electing to comply with this part of ISO 14085:“Filter element test sequence in accordance with ISO 14085-1, Aerospace series Hydraulic Filter ele
43、ments Test methods Part 1: Test sequence” ISO 2015 All rights reserved 5BS ISO 14085-1:2015ISO 14085-1:2015(E)Bibliography1 ISO 3968, Hydraulic fluid power Filters Evaluation of differential pressure versus flow characteristics2 ISO 14085-2, Aerospace series Hydraulic Filter elements Test methods Pa
44、rt 2: Conditioning3 ISO 14085-3, Aerospace series Hydraulic Filter elements Test methods Part 3: Filtration efficiency and retention capacity4 ISO 14085-4, Aerospace series Hydraulic Filter elements Test methods Part 4: Verification of collapse/burst pressure rating5 ISO 14085-5, Aerospace series Hy
45、draulic Filter elements Test methods Part 5: Resistance to flow fatigue6 ISO 14085-6, Aerospace series Hydraulic Filter elements Test methods Part 6: Initial cleanliness level6 ISO 2015 All rights reservedBS ISO 14085-1:2015BS ISO 14085-1:2015ISO 14085-1:2015(E) ISO 2015 All rights reservedICS 49.08
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