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1、BRITISH STANDARD BS 1806:1989 Incorporating Amendment No. 1 Specification for Dimensions of toroidal sealing rings (“O”-rings) and their housings (inch series) UDC 62 762.84:678.074(083.3) Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:54:50 GMT+00:00 2007,
2、Uncontrolled Copy, (c) BSI BS 1806:1989 This British Standard, having been prepared under the direction of the Machinery and Components Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 28 April 1989 BSI 07-1999 First published December 1951 F
3、irst revision December 1962 Second revision April 1989 The following BSI references relate to the work on this standard: Committee reference MCE/11 Draft for comment 87/72482 DC ISBN 0 580 17221 X Committees responsible for this British Standard The preparation of this British Standard was entrusted
4、 by the Machinery and Components Standards Policy Committee (MCE/-) to Technical Committee MCE/11, upon which the following bodies were represented: British Compressed Air Society British Fluid Power Association British Hydromechanics Research Association British Industrial Truck Association British
5、 Rubber Manufacturers Association Engineering Equipment and Materials Users Association Ministry of Defence Society of British Aerospace Companies Limited Society of Motor Manufacturers and Traders Limited Amendments issued since publication Amd. No.Date of issueComments 6953May 1992Indicated by a s
6、ideline in the margin Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:54:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 1806:1989 BSI 07-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2“O”-rings1 3Housing grooves1 Figure 1 “
7、O”-ring13 Figure 2 Housing grooves13 Figure 3 Face sealing14 Figure 4 Triangular housings15 Table 1 Dimensions of “O”-rings of nominal cross section 1/16 in and less2 Table 2 Dimensions of “O”-rings of nominal cross section 3/32 in 3 Table 3 Dimensions of “O”-rings of nominal cross section 1/8 in 5
8、Table 4 Dimensions of “O”-rings of nominal cross section 3/16 in8 Table 5 Dimensions of “O”-rings of nominal cross section 1/4 in11 Table 6 Dimensions of housings for diametral sealing14 Table 7 Dimensions of housings for static face sealing15 Table 8 Dimensions of triangular housings for static fac
9、e sealings15 Publications referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:54:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 1806:1989 ii BSI 07-1999 Foreword This revised British Standard has been prepared under the direction of
10、 the Machinery and Components Standards Policy Committee. It revises and supersedes BS 1806:1962 which is now withdrawn. In view of the continued strong demand for an inch series of “O”-rings it has been decided to revise this standard rather than prepare an extensive amendment of the 1962 edition.
11、Inch dimensions have been retained throughout and metric conversions should be based on BS 350. In this revision the range of “O”-rings has been extended to embrace all the seals listed in British Standard M 48 and also a majority of the sizes listed in SAE Aerospace Standard AS 568A:19841). The dim
12、ensional tolerances on the internal diameter B have in many cases also been increased to reflect current manufacturing practice. It is stressed that the dimensions specified in this standard, although providing the necessary basis for standardization in the manufacture and application of “O”-rings,
13、should not be regarded as providing all the information required for design purposes. Attention is drawn to the desirability of consultation between users and manufacturers of “O”-rings, when a particular application of this type of seal is being considered. A British Standard does not purport to in
14、clude 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 comprises a front cover, an inside front cover, pag
15、es i and ii, pages 1 to 16, 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 amendment table on the inside front cover. 1) Aerospace size standard for “O”-rings, published by the Society
16、 of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096, USA. Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:54:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 1806:1989 BSI 07-19991 1 Scope This British Standard specifies the dimension
17、s of elastomeric “O”-rings which are toroidal in shape and are used for sealing components against ingress or egress of fluids under dynamic and static conditions. The standard also specifies the shape and dimensions of five types of associated housing grooves for the rings when used at pressures no
18、t normally exceeding 1 500 lbf/in2 (100 bar2). Limits for imperfections are not specified in this standard but information is given in the note to clause 2. NOTE 1At pressures exceeding 1 500 lbf/in2, or when the diametral clearances of the grooves are in excess of those specified in this standard,
19、it is recommended that “O”-rings should be used in conjunction with anti-extrusion back-up rings. NOTE 2The titles of the publications referred to in this standard are listed on the inside back cover. 2 “O”-rings NOTESurface imperfections. It is important that “O”-ring surface imperfections should b
20、e such that they do not affect the sealing properties. Acceptable limits of defined and assessed imperfections on elastomeric toroidal sealing rings are specified in BS 6442. 2.1 Dimensions The dimensions and the tolerances of the “O”-rings shall be in accordance with Table 1 to Table 5. 2.2 Materia
21、l “O”-rings shall be manufactured from elastomeric materials that are compatible with the fluid contained by the seal, i.e. that the properties of the material are not altered by chemical interaction. NOTE 1Means of assessing the compatibility of hydraulic fluids with elastomeric materials are speci
22、fied in BS 4832. NOTE 2“O”-rings are normally supplied in nitrile rubber but may also be produced in other elastomers, e.g. silicone, fluorocarbon. 2.3 Seal size number “O”-rings shall be identified by the seal size numbers given in Table 1 to Table 5. 3 Housing grooves 3.1 General The profiles, dim
23、ensions and tolerances of the housing grooves shall be according to the type of sealing application as follows: a) diametral sealing, Figure 2(a) and Figure 2(b) and Table 6; b) static face sealing, Figure 3 and Table 7; c) triangular housing of static face sealing, Figure 4 and Table 8. 3.2 Toleran
24、ces of nominal housing diameter The tolerances associated with diameter C or D3) shall be calculated with respect to the tolerance specified for radial depth F given in Table 6 and an achievable tolerance for the groove diameters c and d, in accordance with Figure 2(a) and Figure 2(b). 3.3 Extrusion
25、 gap To maintain an acceptable extrusion gap, the tolerances of the diameter of the mating parts shall be selected with respect to the following: a) tolerance of the nominal diameter, C or D3), calculated in accordance with 3.2; b) the maximum total diametral clearance G (see Table 6), in accordance
26、 with Figure 2(a) and Figure 2(b). 3.4 Lead-in chamfer To facilitate assembly and to prevent damage to “O”-rings, components over which the “O”-ring passes during fitting shall incorporate a smooth lead-in chamfer. All associated corners shall be radiused. NOTEDetails are shown in Figure 2(a) and Fi
27、gure 2(b) and dimensions are given in Table 6. 3.5 Surface texture The surface texture of the housing groove and associated surfaces, in accordance with BS 1134-1, shall not exceed the following values: 2) 1 bar = 105 N/m2 = 102 kPa. 3) BS 5242-1 specifies tolerances and classes of surface texture f
28、or the surfaces of tubular steel cylinder barrels. a) dynamic sealing surfaces0.4 4m Ra b) static sealing surfaces0.8 4m Ra c) non-sealing surfaces1.6 4m Ra Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:54:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 18
29、06:1989 2 BSI 07-1999 Table 1 Dimensions of “O”-rings of nominal cross section 1/16 in and less “O”-ring size no. Actual diametersaNominal diameters Cross section, A 0.003 Internal, B CbDc inininin 001 002 003 0.040 0.050 0.060 0.029 0.042 0.056 0.004 d d d d d d 004 005 006 007 008 009 010 011 012
30、013 014 0.070 0.070 0.070 0.070 0.070 0.070 0.070 0.070 0.070 0.070 0.070 0.070 0.101 0.114 0.145 0.176 0.208 0.239 0.301 0.364 0.426 0.489 0.005 5/64 7/64 1/8 5/32 3/16 7/32 1/4 5/16 3/8 7/16 1/2 13/64 15/64 1/4 9/32 5/16 11/32 3/8 7/16 1/2 9/16 5/8 0150.0700.551 0.007 9/1611/32 016 017 018 019 020
31、 021 0.070 0.070 0.070 0.070 0.070 0.070 0.614 0.676 0.739 0.801 0.864 0.926 0.009 5/8 11/16 3/4 13/16 7/8 15/16 3/4 13/16 7/8 15/16 1 11/16 022 023 024 0.070 0.070 0.070 0.989 1.051 1.114 0.010 1 11/6 11/8 11/8 13/16 11/4 025 026 027 0.070 0.070 0.070 1.176 1.239 1.301 0.011 13/16 11/4 15/16 15/16
32、13/8 17/16 028 029 030 0.070 0.070 0.070 1.364 1.489 1.614 0.013 13/8 11/2 15/8 11/2 15/8 13/4 031 032 0.070 0.070 1.739 1.864 0.015 13/4 17/8 17/8 2 033 034 035 036 037 0.070 0.070 0.070 0.070 0.070 1.989 2.114 2.239 2.364 2.489 0.018 2 21/8 21/4 23/8 21/2 21/8 21/4 23/8 21/2 25/8 038 039 040 0.070
33、 0.070 0.070 2.614 2.739 2.864 0.020 25/8 23/4 27/8 23/4 27/8 3 041 042 043 0.070 0.070 0.070 2.989 3.239 3.489 0.024 3 31/4 31/2 31/8 33/8 35/8 044 045 0.070 0.070 3.739 3.989 0.027 33/4 4 37/8 41/8 046 047 048 0.070 0.070 0.070 4.239 4.489 4.739 0.030 41/4 41/2 43/4 43/8 45/8 47/8 049 050 0.070 0.
34、070 4.989 5.239 0.037 5 51/4 51/8 53/8 NOTE 1The full range of sizes given are suitable for static sealing. NOTE 2For dynamic sealing select only “O”-ring size nos. 004 to 012. a See Figure 1. b See Figure 2(b), Figure 3 and Figure 4. c See Figure 2(a) and Figure 3. d Since “O”-ring sizes nos. 001,0
35、02 and 003 are extremely small special care should be taken in the selection of housing sizes to achieve an adequate squeeze. Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:54:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 1806:1989 BSI 07-19993 Table 2 Di
36、mensions of “O” -rings of nominal cross section 3/32 in “O”-ring size no. Actual diametersa Nominal diameters Cross section, A 0.003 Internal, B CbDc inininin 102 103 104 105 106 107 108 109 110 111 112 0.103 0.103 0.103 0.103 0.103 0.103 0.103 0.103 0.103 0.103 0.103 0.049 0.081 0.112 0.143 0.174 0
37、.206 0.237 0.299 0.362 0.424 0.487 0.005 1/16 3/32 1/8 5/32 3/16 7/32 1/4 5/16 3/8 7/16 1/2 1/4 9/32 5/16 11/32 3/8 13/32 7/16 1/2 9/16 5/8 11/16 1130.1030.549 0.007 9/163/4 114 115 116 0.103 0.103 0.103 0.612 0.674 0.737 0.009 5/8 11/16 3/4 13/16 7/8 15/16 117 118 119 120 121 122 0.103 0.103 0.103
38、0.103 0.103 0.103 0.799 0.862 0.924 0.987 1.049 1.112 0.010 13/16 7/8 15/16 1 11/16 11/8 1 11/16 11/8 13/16 11/4 15/16 123 124 125 126 127 128 0.103 0.103 0.103 0.103 0.103 0.103 1.174 1.237 1.299 1.362 1.424 1.487 0.012 13/16 11/4 15/16 13/8 17/16 11/2 13/8 17/16 11/2 19/16 15/8 111/16 129 130 131
39、132 133 0.103 0.103 0.103 0.103 0.103 1.549 1.612 1.674 1.737 1.799 0.015 19/16 15/8 111/16 13/4 113/16 13/4 113/16 17/8 115/16 2 134 135 136 137 138 139 140 0.103 0.103 0.103 0.103 0.103 0.103 0.103 1.862 1.925 1.987 2.050 2.112 2.175 2.237 0.017 17/8 115/16 2 21/16 21/8 23/16 21/4 21/16 21/8 23/16
40、 21/4 25/16 23/8 27/16 NOTE 1The full range of sizes given are suitable for static sealing. NOTE 2For dynamic sealing select only “O”-ring size nos. 102 to 116. a See Figure 1. b See Figure 2(b), Figure 3 and Figure 4. c See Figure 2(a) and Figure 3. Licensed Copy: London South Bank University, Lond
41、on South Bank University, Thu Mar 01 06:54:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 1806:1989 4 BSI 07-1999 Table 2 Dimensions of “O” -rings of nominal cross section 3/32 in “O”-ring size no. Actual diametersa Nominal diameters Cross section, A 0.003 Internal, B CbDc inininin 141 142 143 144
42、 145 146 0.103 0.103 0.103 0.103 0.103 0.103 2.300 2.362 2.425 2.487 2.550 2.612 0.020 25/16 23/8 27/16 21/2 29/16 25/8 21/2 29/16 25/8 211/16 23/4 213/16 147 148 149 150 0.103 0.103 0.103 0.103 2.675 2.737 2.800 2.862 0.022 211/16 23/4 213/16 27/8 27/8 215/16 3 31/16 151 152 153 0.103 0.103 0.103 2
43、.987 3.237 3.487 0.024 3 31/4 31/2 33/16 37/16 311/16 154 155 0.103 0.103 3.737 3.987 0.028 33/4 4 315/16 43/16 156 157 158 0.103 0.103 0.103 4.237 4.487 4.737 0.030 41/4 41/2 43/4 47/16 411/16 415/16 159 160 161 162 163 0.103 0.103 0.103 0.103 0.103 4.987 5.237 5.487 5.737 5.987 0.035 5 51/4 51/2 5
44、3/4 6 53/16 57/16 511/16 515/16 63/16 164 165 166 167 0.103 0.103 0.103 0.103 6.237 6.487 6.737 6.987 0.040 61/4 61/2 63/4 7 67/16 611/16 615/16 73/16 168 169 170 171 0.103 0.103 0.103 0.103 7.237 7.487 7.737 7.987 0.045 71/4 71/2 73/4 8 77/16 711/16 715/16 83/16 172 173 174 175 0.103 0.103 0.103 0.
45、103 8.237 8.487 8.737 8.987 0.050 81/4 81/2 83/4 9 87/16 811/16 815/16 93/16 176 177 178 0.103 0.103 0.103 9.237 9.487 9.737 0.055 91/4 91/2 93/4 97/16 911/16 915/16 NOTE 1The full range of sizes given are suitable for static sealing. NOTE 2For dynamic sealing select only “O”-ring size nos. 102 to 1
46、16. a See Figure 1. b See Figure 2(b), Figure 3 and Figure 4. c See Figure 2(a) and Figure 3. Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:54:50 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 1806:1989 BSI 07-19995 Table 3 Dimensions of “O”-rings of nominal
47、 cross section 1/8 in “O”-ring size no. Actual diametersa Nominal diameters Cross section, A 0.004 Internal, B CbDc inininin 201 202 203 204 205 206 0.139 0.139 0.139 0.139 0.139 0.139 0.171 0.234 0.296 0.359 0.421 0.484 0.005 3/16 1/4 5/16 3/8 7/16 1/2 7/16 1/2 9/16 5/8 11/16 3/4 2070.1390.546 0.00
48、7 9/1613/16 208 209 0.139 0.139 0.609 0.671 0.009 5/8 11/16 7/8 15/16 210 211 212 213 214 215 0.139 0.139 0.139 0.139 0.139 0.139 0.734 0.796 0.859 0.921 0.984 1.046 0.010 3/4 13/16 7/8 15/16 1 11/16 1 11/16 11/8 13/16 11/4 15/16 216 217 218 219 220 221 0.139 0.139 0.139 0.139 0.139 0.139 1.109 1.171 1.234 1.296 1.359 1.421 0.012 11/8 13/16 11/4 15/16 13/8 17/16 13/8 17/16 11/2 19/16 15/8 111/16 222 223 224 0.139 0.139 0.139 1.484 1.609 1.734 0.015 11/2 15/8 13/