SANS 205-2009 Road vehicles - Elastomeric cups and seals for cylinders for hydraulic braking systems using a non-petroleum base hydraulic brake fluid (service temperature 70 C max .pdf

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1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22955-9 SANS 205:2009Edition 2ISO 6118:2006Edition 2SOUTH AFRICAN NATIONAL STANDARD Road vehicles Elastomeric cups and seals for cylinders

4、 for hydraulic braking systems using a non-petroleum base hydraulic brake fluid (service temperature 70 C max.) This national standard is the identical implementation of ISO 6118:2006 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standard

5、s Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 205:2009 Edition 2 ISO 6118:2006 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee

6、SABS TC 45, Rubber and rubber products, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in October 2009. This SANS document supersedes SANS 205:2003 (edition 1). INTERNATIONALSTANDARDISO6118Second edi

7、tion2006-07-15Reference numberISO 6118:2006(E) ISO 2006Road vehicles Elastomeric cups and seals for cylinders for hydraulic braking systems using a non-petroleum base hydraulic brake fluid (service temperature 70 C max.)Vhicules routiers Coupelles et joints en lastomre pour cylindres de systmes de f

8、reinage hydrauliques utilisant un liquide de frein base non ptrolire (temprature maximale dutilisation: 70 C)SANS 205:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 6118:2006(E)ii ISO 2006 All rights reservedPDF disclaimerThis PDF fi

9、le may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shallnot be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. Indownloading this file, parties accept therein the r

10、esponsibility of not infringing Adobes licensing policy. The ISO Central Secretariataccepts no liability in this area.Adobe is a trademark of Adobe Systems Incorporated.Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creati

11、onparameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In theunlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2006All rights reserved. Unless oth

12、erwise specified, no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below orISOs member body in the country of the requester.ISO copyright

13、officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandSANS 205:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 6118:2006(E) ISO 2006 All rights

14、reserved iiiContents Page1 Scope 12 Normative references 13 Terms and definitions 14 General requirements 24.1 Workmanship and finish . 24.2 Marking . 24.3 Packaging . 24.4 Sampling 25 Test requirements 25.1 Resistance to fluid at elevated temperature . 25.2 Precipitation . 25.3 Wheel cylinder seals

15、 heat pressure stroking . 25.4 Master cylinder seals heat pressure stroking 35.5 Low temperature performance . 45.6 Oven ageing . 45.7 Corrosion . 55.8 Storage corrosion test 56 Test procedures . 56.1 Resistance to fluid at elevated temperature Dimensional test . 56.2 Precipitation test . 76.3 Wheel

16、 cylinder seals heat pressure stroking . 86.4 Master cylinder seals heat pressure stroking 106.5 Low temperature performance . 126.6 Oven ageing . 136.7 Hardness determination . 136.8 Corrosion test 136.9 Storage corrosion test 15Bibliography . 16SANS 205:2009This s tandard may only be used and prin

17、ted by approved subscription and freemailing clients of the SABS .ISO 6118:2006(E)iv ISO 2006 All rights reservedForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies(ISO member bodies). The work of preparing International Standards i

18、s normally carried out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee. International organizations, governmental andnon-governmental, in liaison with ISO, also take part i

19、n the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters of electrotechnical 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

20、 International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of

21、 the elements of this document may be the subject of patentrights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 6118 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 2, Brakingsystems and equipment.This second edition cancels and re

22、places the first edition (ISO 6118:1980), which has been technically revised.SANS 205:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO 6118:2006(E) ISO 2006 All rights reserved 1Road vehicles Elastomeric cups and

23、 seals for cylinders for hydraulic braking systems using a non-petroleum base hydraulic brake fluid (service temperature 70 C max.)1ScopeThis International Standard specifies performance tests of brake cups and seals for hydraulic braking systemsfor road vehicles. It does not include requirements re

24、lating to chemical composition, tensile strength andelongation of the rubber compound. Disc brake seals are not covered by this International Standard.This International Standard is applicable to moulded seals (cups or double-lipped type gland seals), indiameter and smaller, compounded from rubber,

25、for use in hydraulic actuating cylinders employing road vehiclenon-petroleum base hydraulic brake fluid conforming to the requirements of ISO 4925.NOTE The rubber used in these seals shall be suitable for operation in a temperature range of to .2 Normative referencesThe following referenced document

26、s are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendments) applies.ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness betwe

27、en 10 IRHD and100 IRHD)ISO 188:1998, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance testsISO 4925, Road vehicles Specification of non-petroleum-base brake fluids for hydraulic systemsISO 4926, Road vehicles Hydraulic braking systems Non-petroleum base reference fluids3 Te

28、rms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1 sloughingrelease of carbon black on the surface of the rubber3.2 scoringformation of grooves in the rubber, parallel to the direction of travel of the piston or seal3.3 scuffingvisible erosion of the

29、outer surface of the rubber60 mm40C +70CSANS 205:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 6118:2006(E)2 ISO 2006 All rights reserved4 General requirements4.1 Workmanship and finishSeals shall be free from blisters, pin-holes, c

30、racks, protuberances, embedded foreign material or other physicaldefects which can be detected by thorough inspection, and shall conform to the dimensions specified on thedrawings.4.2 MarkingThe identification mark of the manufacturer and other details as specified on drawings shall be moulded intoe

31、ach seal. Each seal in conformity with this International Standard may also have the following mark:“ISO 6118”.4.3 PackagingSeals shall be packaged to meet requirements specified by the purchaser.4.4 SamplingThe minimum lot on which complete specification tests shall be conducted for quality control

32、 testing, or thefrequency of any specific type test used to control production, shall be agreed upon by the manufacturer and thepurchaser.5 Test requirements5.1 Resistance to fluid at elevated temperatureAfter being subjected to the test for resistance to compatibility fluid at elevated temperature

33、as prescribed in 6.1,the seals shall conform to the requirements specified in Table 1, and shall show no excessive disintegration asevidenced by blisters or sloughing.5.2 PrecipitationNot more than sediment by volume shall be formed in the centrifuge tube after the seals have been testedas specified

34、 in 6.2.5.3 Wheel cylinder seals heat pressure stroking5.3.1 GeneralWheel cylinder seals when tested by the procedure specified in 6.3 shall meet the performance requirementsspecified in 5.3.2 to 5.3.6.Table 1 Requirements for fluid resistance at elevated temperature ( )Characteristics Permitted cha

35、ngeVolume From to Outside diameter, lipFrom to Outside diameter, baseHardness From to 70C0,0 % +16,0 %0,0 % +5,75 %10 IRHD 0 IRHD0,3 %SANS 205:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 6118:2006(E) ISO 2006 All rights reserved 3

36、5.3.2 Lip diameter changeThe minimum lip diameter of wheel cylinder seals after the stroking test shall be greater than the wheel cylinderbore by the minimum dimensions specified in Table 2.5.3.3 LeakageNo constant dampness past the seals and no fluid discoloration of the filter paper on two or more

37、 inspectionsshall occur.5.3.4 CorrosionPistons and cylinder bore shall not show corrosion, as evidenced by pitting, to an extent discernible to the nakedeye, but staining or discoloration shall be permitted.5.3.5 Change in hardnessRubber seals shall not decrease in hardness by more than when tested

38、in accoprdance with theprocedure specified in 6.7.5.3.6 Condition of test sealsWheel cylinder seals shall not show excessive deterioration such as scoring, scuffing, blistering, cracking,chipping (heel abrasion) or change in shape from original appearance.5.4 Master cylinder seals heat pressure stro

39、king5.4.1 GeneralMaster cylinder seals when tested by the procedure specified in 6.4 shall meet the performance requirementsspecified in 5.4.2 to 5.4.6.5.4.2 Lip diameter changeThe minimum lip diameter of master cylinder seals after the stroking test shall be greater than the mastercylinder bore by

40、the minimum dimensions specified in Table 3.Table 2 Lip diameter change of wheel cylinder sealsDimensions in millimetresDiameter of wheel cylinder bore Minimum excess over bore0,400,500,650,75lessorequalslant19,05 19,05lessorequalslant25,4 25,4lessorequalslant38,1 38,1lessorequalslant6010 IRHDSANS 2

41、05:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 6118:2006(E)4 ISO 2006 All rights reserved5.4.3 LeakageSame requirement as specified for wheel cylinder seals shall be applied (see 5.3.3).5.4.4 CorrosionSame requirement as specified

42、 for wheel cylinder seals shall be applied (see 5.3.4).5.4.5 Change in hardnessSame requirement as specified for wheel cylinder seals shall be applied (see 5.3.5).5.4.6 Condition of the test sealsSame requirement as specified for wheel cylinder seals shall be applied (see 5.3.6).5.5 Low temperature

43、performance5.5.1 LeakageNo leakage of fluid shall occur when seals are tested according to the procedure specified in 6.5.1.5.5.2 Bend testThe seal shall not crack and shall return to its approximately original shape within when tested inaccordance with the procedure specified in 6.5.2.5.6 Oven agei

44、ng5.6.1 GeneralSeals when tested according to the procedure specified in 6.6 shall meet the requirements specified in 5.6.2and 5.6.3.5.6.2 Change in hardnessThe change in hardness shall be within the limits of .5.6.3 Condition of the test sealsThe seal shall show no evidence of deterioration, or cha

45、nge in shape from original appearance.Table 3 Lip diameter change of master cylinder sealsDimensions in millimetresDiameter of wheel cylinder bore Minimum excess over bore0,300,400,500,65lessorequalslant19,05 19,05lessorequalslant25,4 25,4lessorequalslant38,1 38,1lessorequalslant601 min5 IRHDSANS 20

46、5:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 6118:2006(E) ISO 2006 All rights reserved 55.7 Corrosion5.7.1 GeneralSeals when tested in accordance with the procedure specified in 6.8 shall meet the requirements specified in5.7.2 a

47、nd 5.7.3.5.7.2 Corrosion of metal stripsThe seals shall not cause corrosion exceeding the limits shown in Table 4. The metal strips outside of the areawhere the strips are in contact shall be neither pitted nor roughened to the extent discernible to the naked eye,but staining or discoloration is per

48、mitted.5.7.3 Fluid-water mixture characteristicsThe fluid-water mixture at the end of the test shall show no gelling at . No crystalline-type depositsshall form and adhere to either the glass wall or the surface of metal strips. The fluid-water mixture shall containno more than sediment by volume.5.

49、8 Storage corrosion testAfter 12 cycles in the humidity cabinet when operated in accordance with the procedure specified 6.9, thereshall be no evidence of corrosion adhering to or penetrating the wall of the cylinder bore that was in contact withthe test seal.Slight discoloration (staining) or any corrosion or spots away from the contact surface of the test seals may bepermissible.6 Test procedures6.1 Resistance to fluid at elevated temperature Dimensional test6.1.1 Apparatus and materialThe followi