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1、BRITISH STANDARD BS ISO 2943:1998 Hydraulic fluid power Filter elements Verification of material compatibility with fluids ICS 23.100.60 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 2943:1998 This British Standard, having been prep
2、ared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 February 1999 BSI 05-1999 ISBN 0 580 32001 4 National foreword This British Standard reproduces verbatim ISO 2943:1998 and implements it as the UK na
3、tional standard. It partially replaces BS 6275-2:1984. The UK participation in its preparation was entrusted to Technical Committee MCE/18, Fluid power systems and components, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European com
4、mittee 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 organizations represented on this committee can be obtained on request to its secretary. Cross-ref
5、erences The British Standards which implement international or European publications referred to in 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 Cat
6、alogue. 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 does not of itself confer immunity from legal obligations. Summary of pages This document co
7、mprises a front cover, an inside front cover, pages i and ii, the ISO title page, pages ii to iv, pages 1 to 5 and 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. Amen
8、dments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 2943:1998 BSI 05-1999i Contents Page National forewordInside front cover Forewordiii Text of ISO 29431 Licensed Copy: sheffieldun she
9、ffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
10、BS ISO 2943:1998 ii BSI 05-1999 Contents Page Forewordiii Introduction1 1Scope1 2Normative references1 3Definitions1 4Equipment1 5Procedure1 6Criteria for acceptance1 7Designated information2 8Identification statement2 Annex A (normative) Reporting method3 Table A.13 Licensed Copy: sheffieldun sheff
11、ieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 2943:1998 BSI 05-1999iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is no
12、rmally 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 and non-governmental, in liaison with ISO, also take part in
13、 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 to the member bodies for voting. Publication as an International Standard
14、requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 2943 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 6, Contamination control and hydraulic fluids. This second edition cancels and replaces the first edition (ISO
15、2943:1987), which has been technically revised. It now includes, provisions for verifying material compatibility at low temperatures and a method for reporting test data. Annex A forms an integral part of this International Standard. Descriptors: Hydraulic fluid power, hydraulic transmission, filter
16、s, fluid filters, components, tests, determination, compatibility. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 294
17、3:1998 BSI 05-19991 Introduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. Filters maintain fluid cleanliness by removing insoluble contaminants. The filter element is the porous device which performs the actual
18、process of filtration. 1 Scope This International Standard specifies a method of verifying the compatibility of materials comprising a hydraulic fluid power filter element with a designated fluid, by verifying the ability of the filter element to maintain its collapse burst rating after being subjec
19、ted to the designated system fluid at a high and/or low temperature. The filter element mounting seal is not included as part of the element. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard.
20、 At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC an
21、d ISO maintain registers of currently valid International Standards. ISO 2941:1974, Hydraulic fluid power Filter elements Verification of collapse/burst resistance. ISO 2942:1994, Hydraulic fluid power Filter elements Verification of fabrication integrity and determination of the first bubble point.
22、 ISO 5598:1985, Fluid power systems and components Vocabulary. 3 Definitions For the purposes of this International Standard, the definitions given in ISO 5598 apply. 4 Equipment 4.1 Temperature bath or oven and cold chamber, capable of maintaining the fluid temperature to within 5 C. 4.2 Vessel sui
23、table for containing the fluid and test elements, closed but vented with adequate safety considerations. 4.3 Test fluid, appropriate to the system. 4.4 Temperature instrumentation, accurate to within 1 C. 5 Procedure 5.1 Subject the filter element to the fabrication integrity test in accordance with
24、 ISO 2942. 5.2 Failure of the filter element to exhibit a minimum bubble pressure as designated by the filter manufacturer shall disqualify the element from further testing. 5.3 Rinse the test element in the test fluid. The element shall be deemed to be clean if any test fluid previously used has be
25、en removed from the test element. Discard the rinsing fluid. 5.4 Immerse the filter element in the designated system fluid for at least 72 h; the fluid shall be maintained for 72 h continuously, at a temperature 15 C above the manufacturers recommended maximum operating temperature. Use new fluid fo
26、r this operation. NOTEThe 72 h soak at 15 C above the hydraulic system manufacturers recommended operating temperature is a practical compromise to achieve an accelerated test rather than a long test at rated temperature. CAUTION Do not exceed the safe temperature of the fluid for this high temperat
27、ure test. This International Standard does not apply in such cases. 5.5 If there is an additional demand for verification of material compatibility with cold fluids, rinse the element as specified in 5.3 and then immerse the filter element in the designated system fluid for at least 72 h. The fluid
28、shall be maintained for 72 h continuously, at a temperature 5 C below the stated minimum temperature of use. Use new fluid for this operation. Use a covered container to prevent condensation. NOTEIn case of running tests on both temperature levels it might be convenient to start with the low tempera
29、ture test in order to use the same test fluid for both tests. Where the high temperature test immediately follows the low temperature test, it is not necessary to renew the test fluid in between tests. 5.6 Subject the filter element to the collapse or burst resistance test in accordance with ISO 294
30、1. 5.7 Report the test information and results as specified in Annex A. 6 Criteria for acceptance 6.1 There shall be no visual evidence of structural failure or damage or functional deterioration. 6.2 The collapse/burst test shall be successfully completed as specified in ISO 2941. Licensed Copy: sh
31、effieldun sheffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 2943:1998 2 BSI 05-1999 7 Designated information Include the following designated information in documents referring to this International Standard: a) maximum operating temperature of the filter element
32、; b) minimum operating temperature of the filter element; c) system fluid. 8 Identification statement (Reference to this International Standard) The use of the following statement in catalogues and sales literature prepared by those electing to comply with this International Standard is strongly rec
33、ommended. “Filter element material compatibility with fluids determined in accordance with ISO 2943:1998, Hydraulic fluid power Filter elements Verification of material compatibility with fluids.” Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c)
34、BSI BS ISO 2943:1998 BSI 05-19993 Annex A (normative) Reporting method A.1 Test identification A.2 Test element identification A.3 Verification of fabrication integrity in accordance with ISO 2942 Manufacturers designated (rated) minimum value1): Pa ( . mbar) Fill in the test conditions and results
35、in Table A.1 at the appropriate places in the ISO 2943 procedure: Table A.1 A.4 Immersion in accordance with ISO 2943:1998, 5.4 A.4.1 Test conditions A.4.2 Immersion in hot fluid condition 1) As specified by the manufacturer. Test parameter/resultInitial (see 5.1) After soaking (see 5.4, and 5.5 if
36、required) After burst test (see 5.6) Fluid Temperature,C Measured bubble point pressurea, Pa (mbar) Bubble locationb Has rated value been exceeded? (yes/no) a Actually observed value: additional information, not required in ISO 2941. b i.e. filter element media, side seam, end cap, etc. Licensed Cop
37、y: sheffieldun sheffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 2943:1998 4 BSI 05-1999 A.4.3 Immersion in cold fluid condition A.4.4 Determination of element condition (in accordance with ISO 2942:1994, 6.1.2 to 6.1.3) Fill in the test conditions and results in
38、 Table A.1 A.5 Determination of collapse/burst pressure in accordance with ISO 2941 A.5.1 Collapse/burst pressure Rated value2):.kPa (bar) A.5.2 Test conditions NOTEA continuous recording of %p = f (mass of contaminant added) is recommended for better evaluation. A.5.3 Test result 2) As specified by
39、 the manufacturer. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 2943:1998 BSI 05-19995 A.5.4 Determination of element condition (in accordance with ISO 2942:1994, 6.1.2 to 6.1.3) Fill in the test conditions and results in Table A.1
40、. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:49:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 2943:1998 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the U
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