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1、BRITISH STANDARD BS 7417:1991 Specification for Interface dimensions of flat face “O”-ring seal hydraulic couplings Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:28:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7417:1991 This British Standard, having bee
2、n prepared under the direction of the Machinery and Components Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 30 April 1991 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference MCE/18 Draft fo
3、r comment 90/71490 DC ISBN 0 580 19386 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Machinery and Components Standards Policy Committee (MCE/-) to Technical Committee MCE/18, upon which the following bodies were represented: Advance
4、d Manufacturing Technology Research Institute Association of British Mining Equipment Companies Bath University Library British Compressed Air Society British Fluid Power Association British Hydromechanics Research Association British Steel Industry Department of Trade and Industry (National Enginee
5、ring Laboratory) Institution of Mechanical Engineers Ministry of Defence The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Industrial Truck Association British Rubber Manufacturers Association Engineering Equipment and Materials Use
6、rs Association Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:28:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7417:1991 BSI 11-1999i Contents Page Committees responsibleInside front cover Forewordi
7、i 1Scope1 2Dimensions1 3Screw threads1 4Thread undercuts1 5“O”-ring sealing surfaces1 Appendix A Examples of flat face “O”-ring seal component combinations4 Figure 1 Details of fitting end, sleeve and nut interfaces2 Figure 2 Examples of component combinations4 Table 1 Interface dimensions for fitti
8、ng end, sleeve and nut3 Publications referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:28:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7417:1991 ii BSI 11-1999 Foreword This British Standard has been prepared under the direction
9、 of the Machinery and Components Standards Policy Committee. It is based upon proposals under consideration by Committee TC 131/SC4 of the International Organization for Standardization (ISO) and also upon the Society of Automotive Engineers Inc. publication SAE Standard J 1453 JUL87. Methods of tes
10、ting hydraulic couplings are described in DD 195-1 and DD 195-2. 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
11、from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amen
12、dment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:28:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7417:1991 BSI 11-19991 1 Scope This British Standard specifies the basic interface dimensions necessary to ensure interc
13、hangeability of hydraulic connectors and adaptors for connecting rigid and flexible tubing to hydraulic fluid power system components. Examples of flat face “O”-ring seal component combinations are given in Appendix A. NOTEThe titles of the publications referred to in this standard are listed on the
14、 inside back cover. 2 Dimensions The dimensions and details of the interface dimensions of the fitting end, the sleeve (or hose nipple) and nut shall be as shown in Figure 1 and in accordance with those given in Table 1. 3 Screw threads All screw threads shall comply with BS 1580-1 b) class 2B for i
15、nternal threads. 4 Thread undercuts All thread undercuts shall be of form B complying with BS 1936-1. 5 “O”-ring sealing surfaces When measured in accordance with BS 1134-1, all “O”-ring sealing surfaces shall have a surface texture of 3.2 m Ra. Licensed Copy: London South Bank University, London So
16、uth Bank University, Fri Dec 08 11:28:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7417:1991 2 BSI 11-1999 NOTEDimensions J and K are critical for high pressure applications. Figure 1 Details of fitting end, sleeve and nut interfaces Licensed Copy: London South Bank University, London South Bank
17、 University, Fri Dec 08 11:28:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7417:1991 BSI 11-19993 Table 1 Interface dimensions for fitting end, sleeve and nut Threada designation Hose inside diameter ABCDEFGHJKL“O”-ring size no.b Tolerances nom.min.nom.min.+0 0.13 nom. 0.13 0.13 0.13 0.13 mmmmmm
18、mmmmmmmmmmmmmmmmmm 6.39.48.22.111.00 0.08 12.75174.012.27 0.131.009.5011 10.010.89.52.412.60 0.08 15.75224.515.21 0.131.009.5012 12.512.411.02.415.77 0.08 18.92245.018.39 0.131.009.5014 1 14 UNS16.015.113.52.719.00 0.08 23.44306.022.86 0.251.5010.522.61016 19.016.614.53.222.17 0.10 27.86366.527.25 0
19、.251.5014.027.00018 25.017.114.83.226.87 0.10 34.21417.033.60 0.251.5015.533.35021 31.517.114.83.233.25 0.13 40.56507.039.98 0.251.5015.539.73025 2 12 UN38.117.114.83.241.17 0.13 48.51607.047.90 0.251.5015.347.65029 a In accordance with BS 1580-1 & BS 1580-2. b In accordance with BS 1806. 9 16 -18 U
20、NF 11 16 -16 UNF 13 16 -16 UN 1 3 16 -12 UN 1 7 16 -12 UN 111 16 - 12 UN Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:28:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7417:1991 4 BSI 11-1999 Appendix A Examples of flat face “O”-ring seal component combi
21、nations Examples of how metric or inch tubing can be accommodated with the same fitting and nut by means of different sleeves are shown in Figure 2. Also shown in Figure 2 is a sleeve/nipple for hose assemblies. Figure 2 Examples of component combinations Licensed Copy: London South Bank University,
22、 London South Bank University, Fri Dec 08 11:28:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7417:1991 BSI 11-1999 Publications referred to BS 1134, Assessment of surface texture. BS 1134-1, Methods and instrumentation. BS 1580, Specification for unified screw threads. BS 1580-1 & BS 1580-2, Dia
23、meter ! in and larger. BS 1806, Specification for dimensions of toroidal sealing rings (“O”-rings) and their housings (inch series). BS 1936, Specification for undercuts and runouts for screw threads. BS 1936-1, Inch screw threads. DD 195, Hydraulic couplings. DD 195-1, Method of test for coupling p
24、ort threads and their seals intended for use in fluid power systems1). DD 195-2, Method of test for couplings intended for use in fluid power systems1). SAE J 1453 JUL87, Fitting “O”-ring face seal1)2). 1) Referred to in the foreword only. 2) Published by the Society of Automotive Engineers Inc., 40
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