PTFE Back-Up Rings
ClaronPolyseal®
PTFE Back-Up Rings This range of products is designed to overcome the problems of 'O'-Ring extrusion when the system pressures are greater than the sealing capabilities of an unsupported 'O'-Ring. The use of P.T.F.E. for anti-extrusion rings has many advantages over 'hard rubber' materials, particularly at high system pressures. The cold flow characteristics of PTFE are used to full advantage in reducing the extrusion gaps to a minimum and allowing automatic compensation for wear. The capability of specialist compounding to suit extremes of duty combined with a high resistance to virtually all chemicals, low friction and wear rates render PTFE as the ideal material for anti-extrusion devices.
Variations Spiral The spiral back up ring is the most common style in use being effectively self adjusting to diametral tolerances. Spiral back up rings are manufactured from virgin PTFE only. Manufactured to suit O-Rings to BS1806, BS4518, JISB2401, JW17000, MS28782 standards Order as part number shown on table.e.g. BS 210 or as below... BS1806 ... BS006 JISB2401 ... JISP003 BS4518 ... BS0031-16 JW17000 ... SJWI7001 MS28782 ... MS28782-001
Endless The endless back up ring is used where problems can occur with the rotation of a screwed endcaps which on assembly could cause a spiral type to unwind. Endless back up rings are normally manufactured from virgin PTFE. Manufactured to suit O-Rings to BS1806, BS4518, JISB2401, MS27595 standards. Order as part number shown on the table with suffix E, e.g. BS 210/E or as below... BS1806 ... BS006/E BS4518 ... BS0031-16/E JISB2401... JISP003/E MS27595 ... MS27595-004
Endless Split The endless split back up ring is manufactured as the endless style but is split at 30o to facilitate ease of assembly in certain applications. Endless split back up rings are normally manufactured from virgin PTFE. Manufactured to suit O-Rings to BS1806, BS4518, JISB2401, MS28774, AS8791/1 standards. Order as part number shown on the table with the suffix ES, e.g. BS 210/ES or as below... BS1806 ... BS006/ES BS4518 ... BS0031-16/ES JISB2401 ... JISP003/ES MS28774 ... MS28774-004/ES AS8791/1 ... M8791-004/ES
Materials All the above can be supplied in a variety of PTFE materials including Virgin PTFE, Glass Filled PTFE and material specifications to MIL-R-8791/1. The Endless and Endless Split Styles can also be supplied in Acetal, Nylon and Peek materials along with a variety of other filled PTFE grades such as Carbon and Bronze.
issue 2 - 22/09/09
F4-1
ClaronPolyseal®
For surface finish and recommended lead in chamfers refer to the illustration below. For housing dimensions and machining tolerances refer to the catalogue page of selected seal. Refer to appendix 4 for value of tolerance symbols.
HOUSING DIMENSIONS (refer to following tables 1& 2)
Gland housing arrangement
Piston housing arrangement
Max groove dia.= Shaft dia.d1min.+2S max Min groove dia.= Shaft dia.d1min.+2S min.
Max. groove dia.= Cylinder dia.D1min.-2S min. Min. groove dia.=Cylinder dia.D1max.-2S max.
POSITIONING OF BACK-UP RINGS
Uni-Directional Pressure
Bi-Directional Pressure
For the back up ring to function correctly, it is important that care be taken in fitting the backup within its housing. For a detailed checklist, refer to Appendix 3.
issue 2 - 10/04/13
F4-2
ClaronPolyseal®
Where O-Rings are used in dynamic applications, an anti-extrusion ring is recommended for pressures >100bar and temperatures >100°C.
issue 1 - 20/10/98
F4-3
ClaronPolyseal®
Housing groove dimensions for 'O'-Rings to BS1806 and BS4518 fitted with back-up rings in Dynamic and Static diametral applications. Tables 1 & 2 refer to the housing drawings.
IM PERIAL Housing groove dimensions for O- Rings to BS1806 fitted with back- up rings in Dynamic & Static diametrical applications. O-Ring Se ction
Radial Width 'S'
Groove Width L1 One back- up ring
Two back- up rings
Radius 'R1' M ax.
Cham. 'C' M in.
Max.
Min.
Max.
Min.
Max.
Min.
0.070"
0.062"
0.060"
0.152"
0.147"
0.210"
0.205"
0.030"
0.085"
0.103"
0.094"
0.091"
0.199"
0.194"
0.257"
0.252"
0.030"
0.097"
0.139"
0.125"
0.122"
0.247"
0.241"
0.305"
0.299"
0.030"
0.103"
0.210"
0.188"
0.184"
0.355"
0.348"
0.427"
0.420"
0.030"
0.156"
0.275"
0.250"
0.245"
0.480"
0.473"
0.582"
0.576"
0.030"
0.187"
Radius 'R1' M ax.
Chamf. 'C' M in.
Table 1
M ETRIC Housing groove dimensions for O- Rings to BS4518 fitted with back- up rings in Dynamic & Static diametrical applications. O-Ring Se ction
Radial Width 'S'
Groove Width L1 One back- up ring
Two back- up rings
Max.
Min.
Max.
Min.
Max.
Min.
1.6 mm
1.3 mm
1.25 mm
4.0 mm
3.8 mm
5.4 mm
5.2 mm
0.5 mm
2.2 mm
2.4 mm
2.09 mm
1.97 mm
4.8 mm
4.6 mm
6.2 mm
6.0 mm
0.5 mm
2.2 mm
3.0 mm
2.65 mm
2.50 mm
5.6 mm
5.4 mm
7.0 mm
6.8 mm
1.0 mm
2.6 mm
5.7 mm
5.18 mm 4.95 mm
9.5 mm
9.3 mm
11.3 mm
11.1 mm
1.0 mm
3.7 mm
Table 2
issue 1 - 20/10/98
F4-4
ClaronPolyseal® PTFE Back-Up Rings To Suit O-Rings to BS 1806
Spiral Solid. E
Imperial
Solid Split. ES
Claron Part Number
Nominal Dimensions Ød1
ØD1
T
Claron Part Number
O-Ring Section
Nominal Dimensions Ød1
ØD1
BS BS BS BS BS
005 006 007 008 009
0.109 0.125 0.156 0.187 0.219
0.234 0.250 0.281 0.312 0.344
BS BS BS BS BS
113 114 115 116 117
0.562 0.625 0.687 0.750 0.812
0.750 0.812 0.875 0.937 1.000
BS BS BS BS BS
010 011 012 013 014
0.250 0.312 0.375 0.437 0.500
0.375 0.437 0.500 0.562 0.625
BS BS BS BS BS
118 119 120 121 122
0.875 0.937 1.000 1.062 1.125
1.062 1.125 1.187 1.250 1.312
BS BS BS BS BS
015 016 017 018 019
0.562 0.625 0.687 0.750 0.812
0.687 0.750 0.812 0.875 0.937
BS BS BS BS BS
123 124 125 126 127
1.187 1.250 1.312 1.375 1.437
1.375 1.437 1.500 1.562 1.625
BS BS BS BS BS
020 021 022 023 024
0.875 0.937 1.000 1.062 1.125
1.000 1.062 1.125 1.187 1.250
BS BS BS BS BS
128 129 130 131 132
1.500 1.562 1.625 1.687 1.750
1.687 1.750 1.812 1.875 1.937
BS BS BS BS BS
025 026 027 028 029
1.187 1.250 1.312 1.375 1.500
1.312 1.375 1.437 1.500 1.625
BS BS BS BS BS
133 134 135 136 137
1.812 1.875 1.937 2.000 2.062
2.000 2.062 2.125 2.187 2.250
BS BS BS BS BS
030 031 032 033 034
1.625 1.750 1.875 2.000 2.125
1.750 1.875 2.000 2.125 2.250
BS BS BS BS BS
138 139 140 141 142
2.125 2.187 2.250 2.312 2.375
2.312 2.375 2.437 2.500 2.562
BS BS BS BS BS
035 036 037 038 039
2.250 2.375 2.500 2.625 2.750
2.375 2.500 2.625 2.750 2.875
BS BS BS BS BS
143 144 145 146 147
2.437 2.500 2.562 2.625 2.687
2.625 2.687 2.750 2.812 2.875
BS BS BS BS BS
040 041 042 043 044
2.875 3.000 3.250 3.500 3.750
3.000 3.125 3.375 3.625 3.875
BS BS BS BS BS
148 149 150 151 152
2.750 2.812 2.875 3.000 3.250
2.937 3.000 3.062 3.187 3.437
BS BS BS BS BS
045 046 047 048 049
4.000 4.250 4.500 4.750 5.000
4.125 4.375 4.625 4.875 5.125
BS BS BS BS BS
153 154 155 156 157
3.500 3.750 4.000 4.250 4.500
3.687 3.937 4.187 4.437 4.687
BS 050
5.250
5.375
BS BS BS BS BS
0.250 0.312 0.375 0.437 0.500
0.437 0.500 0.562 0.625 0.687
BS BS BS BS BS
158 159 160 161 162
4.750 5.000 5.250 5.500 5.750
4.937 5.187 5.437 5.687 5.937
108 109 110 111 112
issue 3 - 09/04/13
0.050 to 0.058
0.050 to 0.058
0.070
0.103
F4-5
T
0.050 to 0.058
O-Ring Section
0.103
ClaronPolyseal® Spiral
PTFE Back-Up Rings To Suit O-Rings to BS 1806
Solid. E Solid Split. ES
Claron Part Number
Nominal Dimensions Ød1
ØD1
T
Claron Part Number
O-Ring Section
Imperial Nominal Dimensions
Ød1
ØD1
BS BS BS BS BS
206 207 208 209 210
0.500 0.562 0.625 0.687 0.750
0.750 0.812 0.875 0.937 1.000
BS BS BS BS BS
256 257 258 259 260
5.750 5.875 6.000 6.250 6.500
6.000 6.125 6.250 6.500 6.750
BS BS BS BS BS
211 212 213 214 215
0.812 0.875 0.937 1.000 1.062
1.062 1.125 1.187 1.250 1.312
BS BS BS BS BS
261 262 263 264 265
6.750 7.000 7.250 7.500 7.750
7.000 7.250 7.500 7.750 8.000
BS BS BS BS BS
216 217 218 219 220
1.125 1.187 1.250 1.312 1.375
1.375 1.437 1.500 1.562 1.625
BS BS BS BS BS
266 267 268 269 270
8.000 8.250 8.500 8.750 9.000
8.250 8.500 8.750 9.000 9.250
BS BS BS BS BS
221 222 223 224 225
1.437 1.500 1.625 1.750 1.875
1.687 1.750 1.875 2.000 2.125
BS BS BS BS BS
271 272 273 274 275
9.250 9.500 9.750 10.000 10.500
9.500 9.750 10.000 10.250 10.750
BS BS BS BS BS
226 227 228 229 230
2.000 2.125 2.250 2.375 2.500
2.250 2.375 2.500 2.625 2.750
BS BS BS BS BS
276 277 278 279 280
11.000 11.500 12.000 13.000 14.000
11.250 11.750 12.250 13.250 14.250
BS BS BS BS BS
231 232 233 234 235
2.625 2.750 2.875 3.000 3.125
2.875 3.000 3.125 3.250 3.375
BS BS BS BS
281 282 283 284
15.000 16.000 17.000 18.000
15.250 16.250 17.250 18.250
BS BS BS BS BS
236 237 238 239 240
3.250 3.375 3.500 3.625 3.750
3.500 3.625 3.750 3.875 4.000
BS BS BS BS BS
314 315 316 317 318
0.750 0.812 0.875 0.937 1.000
1.125 1.187 1.250 1.312 1.375
BS BS BS BS BS
241 242 243 244 245
3.875 4.000 4.125 4.250 4.375
4.125 4.250 4.375 4.500 4.625
BS BS BS BS BS
319 320 321 322 323
1.062 1.125 1.187 1.250 1.312
1.437 1.500 1.562 1.625 1.687
BS BS BS BS BS
246 247 248 249 250
4.500 4.625 4.750 4.875 5.000
4.750 4.875 5.000 5.125 5.250
BS BS BS BS BS
324 325 326 327 328
1.375 1.500 1.625 1.750 1.875
1.750 1.875 2.000 2.125 2.250
BS BS BS BS BS
251 252 253 254 255
5.125 5.250 5.375 5.500 5.625
5.375 5.500 5.625 5.750 5.875
BS BS BS BS BS
329 330 331 332 333
2.000 2.125 2.250 2.375 2.500
2.375 2.500 2.625 2.750 2.875
BS 334 BS 335 BS 336
2.625 2.750 2.875
3.000 3.125 3.250
issue 3 - 09/04/13
0.050 to 0.058
0.139
F4-6
T
O-Ring Section
0.050 to 0.058
0.139
0.062 to 0.072
0.210
ClaronPolyseal® Spiral
PTFE Back-Up Rings To Suit O-Rings to BS 1806
Solid. E Solid Split. ES
Claron Part Number
Nominal Dimensions Ød1
ØD1
T
Claron Part Number
O-Ring Section
Imperial Nominal Dimensions
Ød1
ØD1
BS BS BS BS BS
337 338 339 340 341
3.000 3.125 3.250 3.375 3.500
3.375 3.500 3.625 3.750 3.875
BS BS BS BS BS
425 426 427 428 429
4.500 4.625 4.750 4.875 5.000
5.000 5.125 5.250 5.375 5.500
BS BS BS BS BS
342 343 344 345 346
3.625 3.750 3.875 4.000 4.125
4.000 4.125 4.250 4.375 4.500
BS BS BS BS BS
430 431 432 433 434
5.125 5.250 5.375 5.500 5.625
5.625 5.750 5.875 6.000 6.125
BS BS BS BS BS
347 348 349 350 351
4.250 4.375 4.500 4.625 4.750
4.625 4.750 4.875 5.000 5.125
BS BS BS BS BS
435 436 437 438 439
5.750 5.875 6.000 6.250 6.500
6.250 6.375 6.500 6.750 7.000
BS BS BS BS BS
352 353 354 355 356
4.875 5.000 5.125 5.250 5.375
5.250 5.375 5.500 5.625 5.750
BS BS BS BS BS
440 441 442 443 444
6.750 7.000 7.250 7.500 7.750
7.250 7.500 7.750 8.000 8.250
BS BS BS BS BS
357 358 359 360 361
5.500 5.625 5.750 5.875 6.000
5.875 6.000 6.125 6.250 6.375
BS BS BS BS BS
445 445A 446 446A 447
8.000 8.250 8.500 8.750 9.000
8.500 8.750 9.000 9.250 9.500
BS BS BS BS BS
362 363 364 365 366
6.250 6.500 6.750 7.000 7.250
6.625 6.875 7.125 7.375 7.625
BS BS BS BS BS
447A 448 448A 449 449A
9.250 9.500 9.750 10.000 10.250
9.750 10.000 10.250 10.500 10.750
BS BS BS BS BS
367 368 369 370 371
7.500 7.750 8.000 8.250 8.500
7.875 8.125 8.375 8.625 8.875
BS BS BS BS BS
450 450A 451 451A 452
10.500 10.750 11.000 11.250 11.500
11.000 11.250 11.500 11.750 12.000
BS BS BS BS BS
372 373 374 375 376
8.750 9.000 9.250 9.500 9.750
9.125 9.375 9.625 9.875 10.125
BS BS BS BS BS
452A 453 454 455 456
11.750 12.000 12.500 13.000 13.500
12.250 12.500 13.000 13.500 14.000
BS BS BS BS BS
377 378 379 380 381
10.000 10.500 11.000 11.500 12.000
10.375 10.875 11.375 11.875 12.375
BS BS BS BS BS
457 458 459 460 461
14.000 14.500 15.000 15.500 16.000
14.500 15.000 15.500 16.000 16.500
BS BS BS BS BS
382 383 384 385 386
13.000 14.000 15.000 16.000 17.000
13.375 14.375 15.375 16.375 17.375
BS BS BS BS BS
462 463 464 465 466
16.500 17.000 17.500 18.000 18.500
17.000 17.500 18.000 18.500 19.000
BS BS BS BS BS
387 388 389 390 391
18.000 19.000 20.000 21.000 22.000
18.375 19.375 20.375 21.375 22.375
BS BS BS BS BS
467 468 469 470 471
19.000 19.500 20.000 21.000 22.000
19.500 20.000 20.500 21.500 22.500
BS BS BS BS
392 393 394 395
23.000 24.000 25.000 26.000
23.375 24.375 25.375 26.375
BS BS BS BS
472 473 474 475
23.000 24.000 25.000 26.000
23.500 24.500 25.500 26.500
issue 2 - 09/04/13
0.062 to 0.072
0.210
F4-7
T
0.092 to 0.104
O-Ring Section
0.275
ClaronPolyseal® Solid. E Solid Split. ES
Claron Part Number
Nominal Dimensions Ød1
ØD1
BS BS BS BS BS
0031-16 0041-16 0051-16 0061-16 0071-16
3.5 4.5 5.5 6.5 7.5
6.0 7.0 8.0 9.0 10.0
BS BS BS BS BS
0081-16 0091-16 0101-16 0111-16 0121-16
8.5 9.5 10.5 11.5 12.5
11.0 12.0 13.0 14.0 15.0
BS BS BS BS BS
0131-16 0141-16 0151-16 0161-16 0171-16
13.5 14.5 15.5 16.5 17.5
16.0 17.0 18.0 19.0 20.0
BS BS BS BS BS
0181-16 0191-16 0221-16 0251-16 0271-16
18.5 19.5 22.5 25.5 27.5
21.0 22.0 25.0 28.0 30.0
BS BS BS BS
0291-16 0321-16 0351-16 0371-16
29.5 32.5 35.5 37.5
32.0 35.0 38.0 40.0
BS BS BS BS BS
0036-24 0046-24 0056-24 0066-24 0076-24
4 5 6 7 8
8 9 10 11 12
BS BS BS BS BS
0086-24 0096-24 0106-24 0116-24 0126-24
9 10 11 12 13
13 14 15 16 17
BS BS BS BS BS
0136-24 0146-24 0156-24 0166-24 0176-24
14 15 16 17 18
18 19 20 21 22
BS BS BS BS BS
0186-24 0196-24 0206-24 0216-24 0246-24
19 20 21 22 25
23 24 25 26 29
BS BS BS BS BS
0276-24 0296-24 0316-24 0346-24 0356-24
28 30 32 35 36
32 34 36 39 40
BS BS BS BS BS
0376-24 0396-24 0416-24 0446-24 0456-24
38 40 42 45 46
42 44 46 49 50
BS BS BS BS BS
0476-24 0496-24 0516-24 0536-24 0546-24
48 50 52 54 55
52 54 56 58 59
BS BS BS BS BS
0576-24 0586-24 0596-24 0616-24 0626-24
58 59 60 62 63
62 63 64 66 67
BS 0646-24 BS 0676-24 BS 0696-24
65 68 70
69 72 74
issue 2 - 09/04/13
Metric
PTFE Back-Up Rings To Suit O-Rings to BS 4518
Spiral
T
1.2 to 1.4
1.2 to 1.4
Claron Part Number
O-Ring Section
1.6
2.4
F4-8
Nominal Dimensions Ød1
ØD1
BS 0195-30 BS 0215-30
20 22
25 27
BS BS BS BS BS
0225-30 0245-30 0255-30 0265-30 0275-30
23 25 26 27 28
28 30 31 32 33
BS BS BS BS BS
0295-30 0315-30 0325-30 0345-30 0355-30
30 32 33 35 36
35 37 38 40 41
BS BS BS BS BS
0365-30 0375-30 0395-30 0415-30 0425-30
37 38 40 42 43
42 43 45 47 48
BS BS BS BS BS
0445-30 0495-30 0545-30 0555-30 0575-30
45 50 55 56 58
50 55 60 61 63
BS BS BS BS BS
0595-30 0635-30 0645-30 0695-30 0745-30
60 64 65 70 75
65 69 70 75 80
BS BS BS BS BS
0795-30 0845-30 0895-30 0945-30 0995-30
80 85 90 95 100
85 90 95 100 105
BS BS BS BS BS
1045-30 1095-30 1145-30 1195-30 1245-30
105 110 115 120 125
110 115 120 125 130
BS BS BS BS BS
1295-30 1345-30 1395-30 1445-30 1495-30
130 135 140 145 150
135 140 145 150 155
BS BS BS BS BS
1545-30 1595-30 1645-30 1695-30 1745-30
155 160 165 170 175
160 165 170 175 180
BS BS BS BS BS
1795-30 1845-30 1895-30 1945-30 1995-30
180 185 190 195 200
185 190 195 200 205
BS BS BS BS BS
2045-30 2095-30 2195-30 2295-30 2395-30
205 210 220 230 240
210 215 225 235 245
BS 2495-30
250
255
T
1.2 to 1.4
O-Ring Section
3.0
ClaronPolyseal® Spiral
PTFE Back-Up Rings To Suit O-Rings to BS 4518
Solid. E Solid Split. ES
Claron Part Number
Nominal Dimensions Ød1
ØD1
T
Claron Part Number
O-Ring Section
Metric Nominal Dimensions
Ød1
ØD1
BS BS BS BS BS
0443-57 0453-57 0493-57 0523-57 0543-57
45 46 50 53 55
55 56 60 63 65
BS BS BS BS BS
1743-57 1793-57 1843-57 1893-57 1943-57
175 180 185 190 195
185 190 195 200 205
BS BS BS BS BS
0553-57 0593-57 0623-57 0643-57 0693-57
56 60 63 65 70
66 70 73 75 80
BS BS BS BS BS
1993-57 2043-57 2093-57 2143-57 2193-57
200 205 210 215 220
210 215 220 225 230
BS BS BS BS BS
0743-57 0793-57 0843-57 0893-57 0943-57
75 80 85 90 95
85 90 95 100 105
BS BS BS BS BS
2293-57 2393-57 2493-57 2593-57 2693-57
230 240 250 260 270
240 250 260 270 280
BS BS BS BS BS
0993-57 1043-57 1093-57 1143-57 1193-57
100 105 110 115 120
110 115 120 125 130
BS BS BS BS BS
2793-57 2893-57 2993-57 3193-57 3393-57
280 290 300 320 340
290 300 310 330 350
BS BS BS BS BS
1243-57 1293-57 1343-57 1393-57 1443-57
125 130 135 140 145
135 140 145 150 155
BS BS BS BS BS
3593-57 3793-57 3993-57 4193-57 4393-57
360 380 400 420 440
370 390 410 430 450
BS BS BS BS BS
1493-57 1543-57 1593-57 1643-57 1693-57
150 155 160 165 170
160 165 170 175 180
BS BS BS BS
4593-57 4793-57 4893-57 4993-57
460 480 490 500
470 490 500 510
issue 2 - 09/04/13
1.6 to 1.8
5.7
F4-9
T
1.6 to 1.8
O-Ring Section
5.7
PTFE Back-Up Rings This range of products is designed to overcome the problems of 'O'-Ring extrusion when the system pressures are greater than the sealing capabilities of an unsupported 'O'-Ring. The use of P.T.F.E. for anti-extrusion rings has many advantages over 'hard rubber' materials, particularly at high system pressures. The cold flow characteristics of PTFE are used to full advantage in reducing the extrusion gaps to a minimum and allowing automatic compensation for wear. The capability of specialist compounding to suit extremes of duty combined with a high resistance to virtually all chemicals, low friction and wear rates render PTFE as the ideal material for anti-extrusion devices.
Variations Spiral The spiral back up ring is the most common style in use being effectively self adjusting to diametral tolerances. Spiral back up rings are manufactured from virgin PTFE only. Manufactured to suit O-Rings to BS1806, BS4518, JISB2401, JW17000, MS28782 standards Order as part number shown on table.e.g. BS 210 or as below... BS1806 ... BS006 JISB2401 ... JISP003 BS4518 ... BS0031-16 JW17000 ... SJWI7001 MS28782 ... MS28782-001
Endless The endless back up ring is used where problems can occur with the rotation of a screwed endcaps which on assembly could cause a spiral type to unwind. Endless back up rings are normally manufactured from virgin PTFE. Manufactured to suit O-Rings to BS1806, BS4518, JISB2401, MS27595 standards. Order as part number shown on the table with suffix E, e.g. BS 210/E or as below... BS1806 ... BS006/E BS4518 ... BS0031-16/E JISB2401... JISP003/E MS27595 ... MS27595-004
Endless Split The endless split back up ring is manufactured as the endless style but is split at 30o to facilitate ease of assembly in certain applications. Endless split back up rings are normally manufactured from virgin PTFE. Manufactured to suit O-Rings to BS1806, BS4518, JISB2401, MS28774, AS8791/1 standards. Order as part number shown on the table with the suffix ES, e.g. BS 210/ES or as below... BS1806 ... BS006/ES BS4518 ... BS0031-16/ES JISB2401 ... JISP003/ES MS28774 ... MS28774-004/ES AS8791/1 ... M8791-004/ES
Materials All the above can be supplied in a variety of PTFE materials including Virgin PTFE, Glass Filled PTFE and material specifications to MIL-R-8791/1. The Endless and Endless Split Styles can also be supplied in Acetal, Nylon and Peek materials along with a variety of other filled PTFE grades such as Carbon and Bronze.
issue 2 - 22/09/09
F4-1
ClaronPolyseal®
For surface finish and recommended lead in chamfers refer to the illustration below. For housing dimensions and machining tolerances refer to the catalogue page of selected seal. Refer to appendix 4 for value of tolerance symbols.
HOUSING DIMENSIONS (refer to following tables 1& 2)
Gland housing arrangement
Piston housing arrangement
Max groove dia.= Shaft dia.d1min.+2S max Min groove dia.= Shaft dia.d1min.+2S min.
Max. groove dia.= Cylinder dia.D1min.-2S min. Min. groove dia.=Cylinder dia.D1max.-2S max.
POSITIONING OF BACK-UP RINGS
Uni-Directional Pressure
Bi-Directional Pressure
For the back up ring to function correctly, it is important that care be taken in fitting the backup within its housing. For a detailed checklist, refer to Appendix 3.
issue 2 - 10/04/13
F4-2
ClaronPolyseal®
Where O-Rings are used in dynamic applications, an anti-extrusion ring is recommended for pressures >100bar and temperatures >100°C.
issue 1 - 20/10/98
F4-3
ClaronPolyseal®
Housing groove dimensions for 'O'-Rings to BS1806 and BS4518 fitted with back-up rings in Dynamic and Static diametral applications. Tables 1 & 2 refer to the housing drawings.
IM PERIAL Housing groove dimensions for O- Rings to BS1806 fitted with back- up rings in Dynamic & Static diametrical applications. O-Ring Se ction
Radial Width 'S'
Groove Width L1 One back- up ring
Two back- up rings
Radius 'R1' M ax.
Cham. 'C' M in.
Max.
Min.
Max.
Min.
Max.
Min.
0.070"
0.062"
0.060"
0.152"
0.147"
0.210"
0.205"
0.030"
0.085"
0.103"
0.094"
0.091"
0.199"
0.194"
0.257"
0.252"
0.030"
0.097"
0.139"
0.125"
0.122"
0.247"
0.241"
0.305"
0.299"
0.030"
0.103"
0.210"
0.188"
0.184"
0.355"
0.348"
0.427"
0.420"
0.030"
0.156"
0.275"
0.250"
0.245"
0.480"
0.473"
0.582"
0.576"
0.030"
0.187"
Radius 'R1' M ax.
Chamf. 'C' M in.
Table 1
M ETRIC Housing groove dimensions for O- Rings to BS4518 fitted with back- up rings in Dynamic & Static diametrical applications. O-Ring Se ction
Radial Width 'S'
Groove Width L1 One back- up ring
Two back- up rings
Max.
Min.
Max.
Min.
Max.
Min.
1.6 mm
1.3 mm
1.25 mm
4.0 mm
3.8 mm
5.4 mm
5.2 mm
0.5 mm
2.2 mm
2.4 mm
2.09 mm
1.97 mm
4.8 mm
4.6 mm
6.2 mm
6.0 mm
0.5 mm
2.2 mm
3.0 mm
2.65 mm
2.50 mm
5.6 mm
5.4 mm
7.0 mm
6.8 mm
1.0 mm
2.6 mm
5.7 mm
5.18 mm 4.95 mm
9.5 mm
9.3 mm
11.3 mm
11.1 mm
1.0 mm
3.7 mm
Table 2
issue 1 - 20/10/98
F4-4
ClaronPolyseal® PTFE Back-Up Rings To Suit O-Rings to BS 1806
Spiral Solid. E
Imperial
Solid Split. ES
Claron Part Number
Nominal Dimensions Ød1
ØD1
T
Claron Part Number
O-Ring Section
Nominal Dimensions Ød1
ØD1
BS BS BS BS BS
005 006 007 008 009
0.109 0.125 0.156 0.187 0.219
0.234 0.250 0.281 0.312 0.344
BS BS BS BS BS
113 114 115 116 117
0.562 0.625 0.687 0.750 0.812
0.750 0.812 0.875 0.937 1.000
BS BS BS BS BS
010 011 012 013 014
0.250 0.312 0.375 0.437 0.500
0.375 0.437 0.500 0.562 0.625
BS BS BS BS BS
118 119 120 121 122
0.875 0.937 1.000 1.062 1.125
1.062 1.125 1.187 1.250 1.312
BS BS BS BS BS
015 016 017 018 019
0.562 0.625 0.687 0.750 0.812
0.687 0.750 0.812 0.875 0.937
BS BS BS BS BS
123 124 125 126 127
1.187 1.250 1.312 1.375 1.437
1.375 1.437 1.500 1.562 1.625
BS BS BS BS BS
020 021 022 023 024
0.875 0.937 1.000 1.062 1.125
1.000 1.062 1.125 1.187 1.250
BS BS BS BS BS
128 129 130 131 132
1.500 1.562 1.625 1.687 1.750
1.687 1.750 1.812 1.875 1.937
BS BS BS BS BS
025 026 027 028 029
1.187 1.250 1.312 1.375 1.500
1.312 1.375 1.437 1.500 1.625
BS BS BS BS BS
133 134 135 136 137
1.812 1.875 1.937 2.000 2.062
2.000 2.062 2.125 2.187 2.250
BS BS BS BS BS
030 031 032 033 034
1.625 1.750 1.875 2.000 2.125
1.750 1.875 2.000 2.125 2.250
BS BS BS BS BS
138 139 140 141 142
2.125 2.187 2.250 2.312 2.375
2.312 2.375 2.437 2.500 2.562
BS BS BS BS BS
035 036 037 038 039
2.250 2.375 2.500 2.625 2.750
2.375 2.500 2.625 2.750 2.875
BS BS BS BS BS
143 144 145 146 147
2.437 2.500 2.562 2.625 2.687
2.625 2.687 2.750 2.812 2.875
BS BS BS BS BS
040 041 042 043 044
2.875 3.000 3.250 3.500 3.750
3.000 3.125 3.375 3.625 3.875
BS BS BS BS BS
148 149 150 151 152
2.750 2.812 2.875 3.000 3.250
2.937 3.000 3.062 3.187 3.437
BS BS BS BS BS
045 046 047 048 049
4.000 4.250 4.500 4.750 5.000
4.125 4.375 4.625 4.875 5.125
BS BS BS BS BS
153 154 155 156 157
3.500 3.750 4.000 4.250 4.500
3.687 3.937 4.187 4.437 4.687
BS 050
5.250
5.375
BS BS BS BS BS
0.250 0.312 0.375 0.437 0.500
0.437 0.500 0.562 0.625 0.687
BS BS BS BS BS
158 159 160 161 162
4.750 5.000 5.250 5.500 5.750
4.937 5.187 5.437 5.687 5.937
108 109 110 111 112
issue 3 - 09/04/13
0.050 to 0.058
0.050 to 0.058
0.070
0.103
F4-5
T
0.050 to 0.058
O-Ring Section
0.103
ClaronPolyseal® Spiral
PTFE Back-Up Rings To Suit O-Rings to BS 1806
Solid. E Solid Split. ES
Claron Part Number
Nominal Dimensions Ød1
ØD1
T
Claron Part Number
O-Ring Section
Imperial Nominal Dimensions
Ød1
ØD1
BS BS BS BS BS
206 207 208 209 210
0.500 0.562 0.625 0.687 0.750
0.750 0.812 0.875 0.937 1.000
BS BS BS BS BS
256 257 258 259 260
5.750 5.875 6.000 6.250 6.500
6.000 6.125 6.250 6.500 6.750
BS BS BS BS BS
211 212 213 214 215
0.812 0.875 0.937 1.000 1.062
1.062 1.125 1.187 1.250 1.312
BS BS BS BS BS
261 262 263 264 265
6.750 7.000 7.250 7.500 7.750
7.000 7.250 7.500 7.750 8.000
BS BS BS BS BS
216 217 218 219 220
1.125 1.187 1.250 1.312 1.375
1.375 1.437 1.500 1.562 1.625
BS BS BS BS BS
266 267 268 269 270
8.000 8.250 8.500 8.750 9.000
8.250 8.500 8.750 9.000 9.250
BS BS BS BS BS
221 222 223 224 225
1.437 1.500 1.625 1.750 1.875
1.687 1.750 1.875 2.000 2.125
BS BS BS BS BS
271 272 273 274 275
9.250 9.500 9.750 10.000 10.500
9.500 9.750 10.000 10.250 10.750
BS BS BS BS BS
226 227 228 229 230
2.000 2.125 2.250 2.375 2.500
2.250 2.375 2.500 2.625 2.750
BS BS BS BS BS
276 277 278 279 280
11.000 11.500 12.000 13.000 14.000
11.250 11.750 12.250 13.250 14.250
BS BS BS BS BS
231 232 233 234 235
2.625 2.750 2.875 3.000 3.125
2.875 3.000 3.125 3.250 3.375
BS BS BS BS
281 282 283 284
15.000 16.000 17.000 18.000
15.250 16.250 17.250 18.250
BS BS BS BS BS
236 237 238 239 240
3.250 3.375 3.500 3.625 3.750
3.500 3.625 3.750 3.875 4.000
BS BS BS BS BS
314 315 316 317 318
0.750 0.812 0.875 0.937 1.000
1.125 1.187 1.250 1.312 1.375
BS BS BS BS BS
241 242 243 244 245
3.875 4.000 4.125 4.250 4.375
4.125 4.250 4.375 4.500 4.625
BS BS BS BS BS
319 320 321 322 323
1.062 1.125 1.187 1.250 1.312
1.437 1.500 1.562 1.625 1.687
BS BS BS BS BS
246 247 248 249 250
4.500 4.625 4.750 4.875 5.000
4.750 4.875 5.000 5.125 5.250
BS BS BS BS BS
324 325 326 327 328
1.375 1.500 1.625 1.750 1.875
1.750 1.875 2.000 2.125 2.250
BS BS BS BS BS
251 252 253 254 255
5.125 5.250 5.375 5.500 5.625
5.375 5.500 5.625 5.750 5.875
BS BS BS BS BS
329 330 331 332 333
2.000 2.125 2.250 2.375 2.500
2.375 2.500 2.625 2.750 2.875
BS 334 BS 335 BS 336
2.625 2.750 2.875
3.000 3.125 3.250
issue 3 - 09/04/13
0.050 to 0.058
0.139
F4-6
T
O-Ring Section
0.050 to 0.058
0.139
0.062 to 0.072
0.210
ClaronPolyseal® Spiral
PTFE Back-Up Rings To Suit O-Rings to BS 1806
Solid. E Solid Split. ES
Claron Part Number
Nominal Dimensions Ød1
ØD1
T
Claron Part Number
O-Ring Section
Imperial Nominal Dimensions
Ød1
ØD1
BS BS BS BS BS
337 338 339 340 341
3.000 3.125 3.250 3.375 3.500
3.375 3.500 3.625 3.750 3.875
BS BS BS BS BS
425 426 427 428 429
4.500 4.625 4.750 4.875 5.000
5.000 5.125 5.250 5.375 5.500
BS BS BS BS BS
342 343 344 345 346
3.625 3.750 3.875 4.000 4.125
4.000 4.125 4.250 4.375 4.500
BS BS BS BS BS
430 431 432 433 434
5.125 5.250 5.375 5.500 5.625
5.625 5.750 5.875 6.000 6.125
BS BS BS BS BS
347 348 349 350 351
4.250 4.375 4.500 4.625 4.750
4.625 4.750 4.875 5.000 5.125
BS BS BS BS BS
435 436 437 438 439
5.750 5.875 6.000 6.250 6.500
6.250 6.375 6.500 6.750 7.000
BS BS BS BS BS
352 353 354 355 356
4.875 5.000 5.125 5.250 5.375
5.250 5.375 5.500 5.625 5.750
BS BS BS BS BS
440 441 442 443 444
6.750 7.000 7.250 7.500 7.750
7.250 7.500 7.750 8.000 8.250
BS BS BS BS BS
357 358 359 360 361
5.500 5.625 5.750 5.875 6.000
5.875 6.000 6.125 6.250 6.375
BS BS BS BS BS
445 445A 446 446A 447
8.000 8.250 8.500 8.750 9.000
8.500 8.750 9.000 9.250 9.500
BS BS BS BS BS
362 363 364 365 366
6.250 6.500 6.750 7.000 7.250
6.625 6.875 7.125 7.375 7.625
BS BS BS BS BS
447A 448 448A 449 449A
9.250 9.500 9.750 10.000 10.250
9.750 10.000 10.250 10.500 10.750
BS BS BS BS BS
367 368 369 370 371
7.500 7.750 8.000 8.250 8.500
7.875 8.125 8.375 8.625 8.875
BS BS BS BS BS
450 450A 451 451A 452
10.500 10.750 11.000 11.250 11.500
11.000 11.250 11.500 11.750 12.000
BS BS BS BS BS
372 373 374 375 376
8.750 9.000 9.250 9.500 9.750
9.125 9.375 9.625 9.875 10.125
BS BS BS BS BS
452A 453 454 455 456
11.750 12.000 12.500 13.000 13.500
12.250 12.500 13.000 13.500 14.000
BS BS BS BS BS
377 378 379 380 381
10.000 10.500 11.000 11.500 12.000
10.375 10.875 11.375 11.875 12.375
BS BS BS BS BS
457 458 459 460 461
14.000 14.500 15.000 15.500 16.000
14.500 15.000 15.500 16.000 16.500
BS BS BS BS BS
382 383 384 385 386
13.000 14.000 15.000 16.000 17.000
13.375 14.375 15.375 16.375 17.375
BS BS BS BS BS
462 463 464 465 466
16.500 17.000 17.500 18.000 18.500
17.000 17.500 18.000 18.500 19.000
BS BS BS BS BS
387 388 389 390 391
18.000 19.000 20.000 21.000 22.000
18.375 19.375 20.375 21.375 22.375
BS BS BS BS BS
467 468 469 470 471
19.000 19.500 20.000 21.000 22.000
19.500 20.000 20.500 21.500 22.500
BS BS BS BS
392 393 394 395
23.000 24.000 25.000 26.000
23.375 24.375 25.375 26.375
BS BS BS BS
472 473 474 475
23.000 24.000 25.000 26.000
23.500 24.500 25.500 26.500
issue 2 - 09/04/13
0.062 to 0.072
0.210
F4-7
T
0.092 to 0.104
O-Ring Section
0.275
ClaronPolyseal® Solid. E Solid Split. ES
Claron Part Number
Nominal Dimensions Ød1
ØD1
BS BS BS BS BS
0031-16 0041-16 0051-16 0061-16 0071-16
3.5 4.5 5.5 6.5 7.5
6.0 7.0 8.0 9.0 10.0
BS BS BS BS BS
0081-16 0091-16 0101-16 0111-16 0121-16
8.5 9.5 10.5 11.5 12.5
11.0 12.0 13.0 14.0 15.0
BS BS BS BS BS
0131-16 0141-16 0151-16 0161-16 0171-16
13.5 14.5 15.5 16.5 17.5
16.0 17.0 18.0 19.0 20.0
BS BS BS BS BS
0181-16 0191-16 0221-16 0251-16 0271-16
18.5 19.5 22.5 25.5 27.5
21.0 22.0 25.0 28.0 30.0
BS BS BS BS
0291-16 0321-16 0351-16 0371-16
29.5 32.5 35.5 37.5
32.0 35.0 38.0 40.0
BS BS BS BS BS
0036-24 0046-24 0056-24 0066-24 0076-24
4 5 6 7 8
8 9 10 11 12
BS BS BS BS BS
0086-24 0096-24 0106-24 0116-24 0126-24
9 10 11 12 13
13 14 15 16 17
BS BS BS BS BS
0136-24 0146-24 0156-24 0166-24 0176-24
14 15 16 17 18
18 19 20 21 22
BS BS BS BS BS
0186-24 0196-24 0206-24 0216-24 0246-24
19 20 21 22 25
23 24 25 26 29
BS BS BS BS BS
0276-24 0296-24 0316-24 0346-24 0356-24
28 30 32 35 36
32 34 36 39 40
BS BS BS BS BS
0376-24 0396-24 0416-24 0446-24 0456-24
38 40 42 45 46
42 44 46 49 50
BS BS BS BS BS
0476-24 0496-24 0516-24 0536-24 0546-24
48 50 52 54 55
52 54 56 58 59
BS BS BS BS BS
0576-24 0586-24 0596-24 0616-24 0626-24
58 59 60 62 63
62 63 64 66 67
BS 0646-24 BS 0676-24 BS 0696-24
65 68 70
69 72 74
issue 2 - 09/04/13
Metric
PTFE Back-Up Rings To Suit O-Rings to BS 4518
Spiral
T
1.2 to 1.4
1.2 to 1.4
Claron Part Number
O-Ring Section
1.6
2.4
F4-8
Nominal Dimensions Ød1
ØD1
BS 0195-30 BS 0215-30
20 22
25 27
BS BS BS BS BS
0225-30 0245-30 0255-30 0265-30 0275-30
23 25 26 27 28
28 30 31 32 33
BS BS BS BS BS
0295-30 0315-30 0325-30 0345-30 0355-30
30 32 33 35 36
35 37 38 40 41
BS BS BS BS BS
0365-30 0375-30 0395-30 0415-30 0425-30
37 38 40 42 43
42 43 45 47 48
BS BS BS BS BS
0445-30 0495-30 0545-30 0555-30 0575-30
45 50 55 56 58
50 55 60 61 63
BS BS BS BS BS
0595-30 0635-30 0645-30 0695-30 0745-30
60 64 65 70 75
65 69 70 75 80
BS BS BS BS BS
0795-30 0845-30 0895-30 0945-30 0995-30
80 85 90 95 100
85 90 95 100 105
BS BS BS BS BS
1045-30 1095-30 1145-30 1195-30 1245-30
105 110 115 120 125
110 115 120 125 130
BS BS BS BS BS
1295-30 1345-30 1395-30 1445-30 1495-30
130 135 140 145 150
135 140 145 150 155
BS BS BS BS BS
1545-30 1595-30 1645-30 1695-30 1745-30
155 160 165 170 175
160 165 170 175 180
BS BS BS BS BS
1795-30 1845-30 1895-30 1945-30 1995-30
180 185 190 195 200
185 190 195 200 205
BS BS BS BS BS
2045-30 2095-30 2195-30 2295-30 2395-30
205 210 220 230 240
210 215 225 235 245
BS 2495-30
250
255
T
1.2 to 1.4
O-Ring Section
3.0
ClaronPolyseal® Spiral
PTFE Back-Up Rings To Suit O-Rings to BS 4518
Solid. E Solid Split. ES
Claron Part Number
Nominal Dimensions Ød1
ØD1
T
Claron Part Number
O-Ring Section
Metric Nominal Dimensions
Ød1
ØD1
BS BS BS BS BS
0443-57 0453-57 0493-57 0523-57 0543-57
45 46 50 53 55
55 56 60 63 65
BS BS BS BS BS
1743-57 1793-57 1843-57 1893-57 1943-57
175 180 185 190 195
185 190 195 200 205
BS BS BS BS BS
0553-57 0593-57 0623-57 0643-57 0693-57
56 60 63 65 70
66 70 73 75 80
BS BS BS BS BS
1993-57 2043-57 2093-57 2143-57 2193-57
200 205 210 215 220
210 215 220 225 230
BS BS BS BS BS
0743-57 0793-57 0843-57 0893-57 0943-57
75 80 85 90 95
85 90 95 100 105
BS BS BS BS BS
2293-57 2393-57 2493-57 2593-57 2693-57
230 240 250 260 270
240 250 260 270 280
BS BS BS BS BS
0993-57 1043-57 1093-57 1143-57 1193-57
100 105 110 115 120
110 115 120 125 130
BS BS BS BS BS
2793-57 2893-57 2993-57 3193-57 3393-57
280 290 300 320 340
290 300 310 330 350
BS BS BS BS BS
1243-57 1293-57 1343-57 1393-57 1443-57
125 130 135 140 145
135 140 145 150 155
BS BS BS BS BS
3593-57 3793-57 3993-57 4193-57 4393-57
360 380 400 420 440
370 390 410 430 450
BS BS BS BS BS
1493-57 1543-57 1593-57 1643-57 1693-57
150 155 160 165 170
160 165 170 175 180
BS BS BS BS
4593-57 4793-57 4893-57 4993-57
460 480 490 500
470 490 500 510
issue 2 - 09/04/13
1.6 to 1.8
5.7
F4-9
T
1.6 to 1.8
O-Ring Section
5.7
