Standard
Dynamic I.D. and O.D. Sealing Gland
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Dynamic I.D./O.D. Sealing Details
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Dynamic I.D./O.D. Seal with a Rectangular Gland
Sealing Basics
Cross-section squeeze: Cross-section squeeze is defined as the compression of the seal cross-section, which is a result of the gland depth being less than the seal cross-section diameter. It is recommended that dynamic seals, a squeeze percentage of 12-18% is recommended to reduce friction and abrasion.
Squeeze % = ((Seal Cross-Section - Gland Cross-Section)/Seal Cross-Section) x 100%
Diameter Stretch: Stretch occurs when the inside diameter (I.D.) of the seal is smaller than the gland I.D., requiring extension of the seals diameter for installation and fit. It is generally recommended that a seal not be stretched more than 50% during installation. In smaller diameter o-rings, where the recommended installation stretch is exceeded, sufficient time should be allowed for the o-ring to return to its normal diameter before closing the gland. An installed I.D. stretch percentage of 1-3% is recommended for all gland configurations over 0.500" diameter. The recommended dimensions for glands with diameters less than 0.500" do provide for stretching the o-ring, in the installed state, greater than this amount. Any time an I.D. of an o-ring, in its installed state, is stretched greater than 3%, seal life will be compromised. On face seals, the stretch ensures the seal will stay in the gland. Overstretching a seal may cause additional stresses in the material and lead to premature failure. Rod seals are normally compressed or have line-to-line fit on the outside diameter without any stretch.
Stretch % = ((Gland I.D. - Seal I.D.)/Seal I.D.) x 100%
Gland Volume Fill: Gland volume fill is defined as the amount of gland volume occupied by the seal in a compressed state. The recommended ranges for gland volume fill percentage are: static applications: 85-90%, dynamic applications: 80-85%. These ranges allow for tolerance variations, thermal expansion and fluid volume. They also prevent excessive movement of the seal in the gland.
Gland Fill % = (Seal Volume/Gland Volume) x 100%
Material Selection: The correct balance of physical properties and service media compatibility ensures that the hardware and seal combination will meet the application requirements. In semiconductor manufacturing, the seal and hardware material face an additional requirement: The combination must not add contaminants during the wafer fabrication process.
Gland Surface Finish: To optimize the sealing integrity and performance life, the gland surface should be free of nicks, dents and scratches. A gland surface finish of 8-16 Ra is recommended for vacuum systems. A gland surface finish of 16-32 Ra is recommended for pressure or atmospheric systems.
Standard
Dynamic I.D. and O.D. Sealing Gland
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Dynamic I.D./O.D. Sealing Details
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Standard Dynamic I.D./O.D. Seal Diametrical Dimensions
| A Dash Size |
B O-ring Cross-Section |
C O-Ring Diameter |
D | E | F | G | H | I | ||
| O.D. Sealing Type | I.D. Sealing Type | |||||||||
| Gland Dia |
Piston Dia |
Bore Dia |
Gland Dia |
Rod Dia |
Bore Dia |
|||||
| Nom | Tol +/- | Nom | Tol +/- | +.000 -.002 |
+.000 -.001 |
+.002 -.000 |
+.002 -.000 |
+.000 -.002 |
+.001 -.000 |
|
| -006 -007 -008 -009 -010 |
0.070 0.070 0.070 0.070 0.070 |
0.003 0.003 0.003 0.003 0.003 |
0.114 0.145 0.176 0.208 0.239 |
0.005 0.005 0.005 0.005 0.005 |
0.139 0.170 0.201 0.233 0.264 |
0.247 0.278 0.309 0.341 0.372 |
0.249 0.280 0.311 0.343 0.374 |
0.234 0.265 0.296 0.328 0.359 |
0.124 0.155 0.186 0.218 0.249 |
0.126 0.157 0.188 0.220 0.251 |
| -011 -012 |
0.070 0.070 |
0.003 0.003 |
0.301 0.364 |
0.005 0.005 |
0.326 0.389 |
0.434 0.497 |
0.436 0.499 |
0.421 0.484 |
0.311 0.374 |
0.313 0.376 |
Dimensions in inches
| A Dash Size |
B O-ring Cross-Section |
C O-Ring Diameter |
D | E | F | G | H | I | ||
| O.D. Sealing Type | I.D. Sealing Type | |||||||||
| Gland Dia |
Piston Dia |
Bore Dia |
Gland Dia |
Rod Dia |
Bore Dia |
|||||
| Nom | Tol +/- | Nom | Tol +/- | +.000 -.002 |
+.000 -.001 |
+.002 -.000 |
+.002 -.000 |
+.000 -.002 |
+.001 -.000 |
|
| -104 -105 |
0.103 0.103 |
0.003 0.003 |
0.112 0.143 |
0.005 0.005 |
0.136 0.167 |
0.310 0.341 |
0.312 0.343 |
0.300 0.331 |
0.124 0.155 |
0.126 0.157 |
| -106 -107 -108 -109 -110 |
0.103 0.103 0.103 0.103 0.103 |
0.003 0.003 0.003 0.003 0.003 |
0.174 0.206 0.237 0.299 0.362 |
0.005 0.005 0.005 0.005 0.005 |
0.198 0.230 0.261 0.323 0.386 |
0.372 0.404 0.435 0.497 0.560 |
0.374 0.406 0.437 0.499 0.562 |
0.362 0.394 0.425 0.487 0.550 |
0.186 0.218 0.249 0.311 0.374 |
0.188 0.220 0.251 0.313 0.376 |
| -111 -112 -113 -114 -115 |
0.103 0.103 0.103 0.103 0.103 |
0.003 0.003 0.003 0.003 0.003 |
0.424 0.487 0.549 0.612 0.674 |
0.005 0.005 0.007 0.009 0.009 |
0.448 0.511 0.573 0.636 0.698 |
0.622 0.685 0.747 0.810 0.872 |
0.624 0.687 0.749 0.812 0.874 |
0.612 0.675 0.737 0.800 0.862 |
0.436 0.499 0.561 0.624 0.686 |
0.438 0.501 0.563 0.626 0.688 |
| -116 | 0.103 | 0.003 | 0.737 | 0.009 | 0.761 | 0.935 | 0.935 | 0.925 | 0.749 | 0.751 |
Dimensions in inches
| A Dash Size |
B O-ring Cross-Section |
C O-Ring Diameter |
D | E | F | G | H | I | ||
| O.D. Sealing Type | I.D. Sealing Type | |||||||||
| Gland Dia |
Piston Dia |
Bore Dia |
Gland Dia |
Rod Dia |
Bore Dia |
|||||
| Nom | Tol +/- | Nom | Tol +/- | +.000 -.002 |
+.000 -.001 |
+.002 -.000 |
+.002 -.000 |
+.000 -.002 |
+.001 -.000 |
|
| -201 -202 -203 -204 -205 |
0.139 0.139 0.139 0.139 0.139 |
0.004 0.004 0.004 0.004 0.004 |
0.171 0.234 0.296 0.359 0.421 |
0.005 0.005 0.005 0.005 0.005 |
0.195 0.258 0.320 0.383 0.445 |
0.434 0.497 0.559 0.622 0.684 |
0.437 0.500 0.562 0.625 0.687 |
0.427 0.490 0.552 0.615 0.677 |
0.185 0.248 0.310 0.373 0.435 |
0.188 0.251 0.313 0.376 0.438 |
| -206 -207 -208 -209 -210 |
0.139 0.139 0.139 0.139 0.139 |
0.004 0.004 0.004 0.004 0.004 |
0.484 0.546 0.609 0.671 0.734 |
0.005 0.007 0.009 0.009 0.010 |
0.508 0.570 0.633 0.695 0.758 |
0.747 0.809 0.872 0.934 0.997 |
0.750 0.812 0.875 0.937 1.000 |
0.740 0.802 0.865 0.927 0.990 |
0.498 0.560 0.623 0.685 0.748 |
0.501 0.563 0.626 0.688 0.751 |
| -211 -212 -213 -214 -215 |
0.139 0.139 0.139 0.139 0.139 |
0.004 0.004 0.004 0.004 0.004 |
0.796 0.859 0.921 0.984 1.046 |
0.010 0.010 0.010 0.010 0.010 |
0.820 0.883 0.945 1.008 1.070 |
1.059 1.122 1.184 1.247 1.309 |
1.062 1.125 1.187 1.250 1.312 |
1.052 1.115 1.177 1.240 1.302 |
0.810 0.873 0.935 0.998 1.060 |
0.813 0.876 0.938 1.001 1.063 |
| -216 -217 -218 -219 -220 |
0.139 0.139 0.139 0.139 0.139 |
0.004 0.004 0.004 0.004 0.004 |
1.109 1.171 1.234 1.296 1.359 |
0.012 0.012 0.012 0.012 0.012 |
1.113 1.195 1.258 1.320 1.383 |
1.372 1.434 1.497 1.559 1.622 |
1.375 1.437 1.500 1.562 1.625 |
1.365 1.427 1.490 1.552 1.615 |
1.123 1.185 1.248 1.310 1.373 |
1.126 1.188 1.251 1.313 1.376 |
| -221 -222 |
0.139 0.139 |
0.004 0.004 |
1.421 1.484 |
0.012 0.015 |
1.445 1.508 |
1.684 1.747 |
1.687 1.750 |
1.677 1.750 |
1.435 1.498 |
1.438 1.501 |
Dimensions in inches
| A Dash Size |
B O-ring Cross-Section |
C O-Ring Diameter |
D | E | F | G | H | I | ||
| O.D. Sealing Type | I.D. Sealing Type | |||||||||
| Gland Dia |
Piston Dia |
Bore Dia |
Gland Dia |
Rod Dia |
Bore Dia |
|||||
| Nom | Tol +/- | Nom | Tol +/- | +.000 -.004 |
+.000 -.004 |
+.000 -.004 |
+.004 -.000 |
+.004 -.000 |
+.004 -.000 |
|
| -309 -310 |
0.210 0.210 |
0.005 0.005 |
0.412 0.475 |
0.005 0.005 |
0.442 0.505 |
0.809 0.872 |
0.812 0.875 |
0.805 0.868 |
0.435 0.498 |
0.438 0.501 |
| -311 -312 -313 -314 -315 |
0.210 0.210 0.210 0.210 0.210 |
0.005 0.005 0.005 0.005 0.005 |
0.537 0.600 0.662 0.725 0.787 |
0.007 0.009 0.009 0.010 0.010 |
0.567 0.630 0.692 0.755 0.817 |
0.934 0.997 1.059 1.122 1.184 |
0.937 1.000 1.062 1.125 1.187 |
0.930 0.993 1.055 1.118 1.180 |
0.560 0.623 0.685 0.748 0.810 |
0.563 0.626 0.688 0.751 0.813 |
| -316 -317 -318 -319 -320 |
0.210 0.210 0.210 0.210 0.210 |
0.005 0.005 0.005 0.005 0.005 |
0.850 0.912 0.975 1.037 1.100 |
0.010 0.010 0.010 0.010 0.012 |
0.880 0.942 1.005 1.067 1.130 |
1.247 1.309 1.372 1.434 1.497 |
1.250 1.312 1.375 1.437 1.500 |
1.243 1.305 1.368 1.430 1.493 |
0.873 0.935 0.998 1.060 1.123 |
0.876 0.938 1.001 1.063 1.126 |
| -321 -322 -323 -324 -325 |
0.210 0.210 0.210 0.210 0.210 |
0.005 0.005 0.005 0.005 0.005 |
1.162 1.225 1.287 1.350 1.475 |
0.012 0.012 0.012 0.012 0.015 |
0.192 0.255 1.317 1.380 1.505 |
1.559 1.622 1.684 1.747 1.872 |
1..562 1.625 1.687 1.750 1.875 |
1.555 1.618 1.680 1.743 1.868 |
1.185 1.248 1.310 1.373 1.498 |
1.188 1.251 1.313 1.376 1.501 |
| -326 -327 -328 -329 -330 |
0.210 0.210 0.210 0.210 0.210 |
0.005 0.005 0.005 0.005 0.005 |
1.600 1.725 1.850 1.975 2.100 |
0.015 0.015 0.015 0.018 0.018 |
1.630 1.755 1.880 2.005 2.130 |
1.997 2.122 2.247 2.372 2.497 |
2.000 2.125 2.250 2.375 2.500 |
1.993 2.118 2.243 2.368 2.493 |
1.623 1.748 1.873 1.998 2.123 |
1.626 1.751 1.876 2.001 2.126 |
| -331 -332 -333 -334 -335 |
0.210 0.210 0.210 0.210 0.210 |
0.005 0.005 0.005 0.005 0.005 |
2.225 2.350 2.475 2.600 2.725 |
0.018 0.018 0.020 0.020 0.020 |
2.255 2.380 2.505 2.630 2.755 |
2.622 2.747 2.872 2.997 3.122 |
2.625 2.750 2.875 3.000 3.125 |
2.618 2.743 2.868 2.993 3.118 |
2.248 2.373 2.498 2.623 2.748 |
2.251 2.376 2.501 2.626 2.751 |
| -336 -337 -338 -339 -340 |
0.210 0.210 0.210 0.210 0.210 |
0.005 0.005 0.005 0.005 0.005 |
2.850 2.975 3.100 3.225 3.350 |
0.020 0.024 0.024 0.024 0.024 |
2.880 3.005 3.130 3.255 3.380 |
3.247 3.372 3.497 3.622 3.747 |
3.250 3.375 3.500 3.625 3.750 |
3.243 3.368 3.493 3.618 3.743 |
2.873 2.998 3.123 3.248 3.373 |
2.876 3.001 3.126 3.251 3.376 |
| -341 -342 -343 -344 -345 |
0.210 0.210 0.210 0.210 0.210 |
0.005 0.005 0.005 0.005 0.005 |
3.475 3.600 3.725 3.850 3.975 |
0.024 0.028 0.028 0.028 0.028 |
3.505 3.630 3.755 3.880 4.005 |
3.872 3.997 4.122 4.247 4.372 |
3.875 4.000 4.125 4.250 4.375 |
3.868 3.993 4.118 4.243 4.368 |
3.498 3.623 3.748 3.873 3.998 |
3.501 3.626 3.751 3.876 4.001 |
| -346 -347 -348 -349 |
0.210 0.210 0.210 0.210 |
0.005 0.005 0.005 0.005 |
4.100 4.225 4.350 4.475 |
0.028 0.030 0.030 0.030 |
4.130 4.255 4.380 4.505 |
4.497 4.622 4.747 4.872 |
4.500 4.625 4.750 4.875 |
4.493 4.618 4.743 4.868 |
4.123 4.248 4.373 4.498 |
4.126 4.251 4.376 4.501 |
Dimensions in inches
| A Dash Size |
B O-ring Cross-Section |
C O-Ring Diameter |
D | E | F | G | H | I | ||
| O.D. Sealing Type | I.D. Sealing Type | |||||||||
| Gland Dia |
Piston Dia |
Bore Dia |
Gland Dia |
Rod Dia |
Bore Dia |
|||||
| Nom | Tol +/- | Nom | Tol +/- | +.000 -.004 |
+.000 -.004 |
+.000 -.004 |
+.004 -.000 |
+.004 -.000 |
+.004 -.000 |
|
| -425 | 0.275 | 0.006 | 4.475 | 0.033 | 4.528 | 4.998 | 5.002 | 4.971 | 4.497 | 4.501 |
| -426 -427 -428 -429 -430 |
0.275 0.275 0.275 0.275 0.275 |
0.006 0.006 0.006 0.006 0.006 |
4.600 4.725 4.850 4.975 5.100 |
0.033 0.033 0.033 0.037 0.037 |
4.653 4.778 4.903 5.028 5.153 |
5.123 5.248 5.373 5.498 5.623 |
5.127 5.252 5.377 5.502 5.627 |
5.096 5.221 5.346 5.471 5.596 |
4.622 4.747 4.875 4.997 5.122 |
4.626 4.751 4.876 5.001 5.126 |
| -431 -432 -433 -434 -435 |
0.275 0.275 0.275 0.275 0.275 |
0.006 0.006 0.006 0.006 0.006 |
5.225 5.350 5.475 5.600 5.725 |
0.037 0.037 0.037 0.037 0.037 |
5.278 5.403 5.528 5.653 5.778 |
5.748 5.873 5.998 6.123 6.248 |
5.752 5.877 6.002 6.127 6.252 |
5.721 5.846 5.971 6.096 6.221 |
5.247 5.372 5.497 5.622 5.747 |
5.251 5.376 5.501 5.626 5.751 |
| -436 -437 -438 -439 -440 |
0.275 0.275 0.275 0.275 0.275 |
0.006 0.006 0.006 0.006 0.006 |
5.850 5.975 6.225 6.475 6.725 |
0.037 0.037 0.040 0.040 0.040 |
5.903 6.028 6.278 6.528 6.778 |
6.373 6.498 6.748 6.998 7.248 |
6.377 6.502 6.752 7.002 7.252 |
6.346 6.471 6.721 6.921 7.221 |
5.872 5.997 6.247 6.497 6.747 |
5.873 6.001 6.251 6.501 6.751 |
| -441 -442 -443 -444 -445 |
0.275 0.275 0.275 0.275 0.275 |
0.006 0.006 0.006 0.006 0.006 |
6.975 7.225 7.475 7.725 7.975 |
0.040 0.045 0.045 0.045 0.045 |
7.028 7.278 7.528 7.778 8.028 |
7.498 7.748 7.998 8.248 8.498 |
7.502 7.752 8.002 8.252 8.502 |
7.471 7.721 7.971 8.221 8.471 |
6.997 7.247 7.497 7.747 7.997 |
7.001 7.251 7.501 7.751 8.001 |
| -446 -447 -448 -449 -450 |
0.275 0.275 0.275 0.275 0.275 |
0.006 0.006 0.006 0.006 0.006 |
8.475 8.975 9.475 9.975 10.475 |
0.055 0.055 0.055 0.055 0.060 |
8.528 9.028 9.528 10.028 10.528 |
8.998 9.498 9.998 10.498 10.998 |
9.002 9.502 10.002 10.502 11.002 |
8.971 9.471 9.971 10.471 10.971 |
8.497 8.997 9.497 9.997 10.497 |
8.501 9.001 9.501 10.001 10.501 |
| -451 -452 -453 -454 -455 |
0.275 0.275 0.275 0.275 0.275 |
0.006 0.006 0.006 0.006 0.006 |
10.975 11.475 11.975 12.475 12.975 |
0.060 0.060 0.060 0.060 0.060 |
11.028 11.528 12.028 12.528 13.028 |
11.498 11.998 12.498 12.998 13.498 |
11.502 12.002 12.502 13.002 13.502 |
11.471 11.971 12.471 12.971 13.471 |
10.997 11.497 11.997 12.497 12.997 |
11.001 11.501 12.001 12.501 13.001 |
| -456 -457 -458 -459 -460 |
0.275 0.275 0.275 0.275 0.275 |
0.006 0.006 0.006 0.006 0.006 |
13.475 13.975 14.475 14.975 15.475 |
0.070 0.070 0.070 0.070 0.070 |
13.528 14.028 14.528 15.028 15.528 |
13.998 14.498 14.998 15.498 15.998 |
14.002 14.502 15.002 15.502 16.002 |
13.971 14.471 14.971 15.471 15.971 |
13.497 13.997 14.497 14.997 15.497 |
13.501 14.001 14.501 15.001 15.501 |
Dimensions in inches.
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