 Dynamic Sealing Applications
Orings are often used as rod or piston seals in hydraulic and pneumatic cylinders. The o-ring must be installed in a rectangular groove with the correct radial squeeze (see table 1 below).
Static Sealing Applications
O-Rings may also be used as static seals, in flange connections, covers, pins, bolts, etc. Correct gland dimensions are important for effective sealing (see table 2 below).
Industrial Reciprocating O-ring Glands
Table 1
O-Ring
Dash No.
|
W
O-Ring
Cross
Section
|
C
Gland
Depth
|
Squeeze
|
G
Groove
Width
|
R
Groove
Radius
|
|
Inches
|
%
|
| -008 to -050 |
.070 ± .003 |
.055 - .057 |
.010 - .018 |
15 - 25 |
.090 / .100 |
.005 - .015 |
| -102 to -178 |
.103 ± .003 |
.087 - .090 |
.010 - .019 |
10.18 |
.140 / .150 |
.005 - .020 |
| -201 to -278 |
.139 ± .004 |
.119 - .123 |
.012 - .024 |
9 - 17 |
.190 / .200 |
.005 - .030 |
| -309 to -380 |
.210 ± .005 |
.183 - .188 |
.017 - .032 |
8.5 - 15 |
.280 / .290 |
.005 - .050 |
| -425 to -452 |
.275 ± .006 |
.234 - .240 |
.029 - .047 |
10.5 - 17 |
.380 / .390 |
.005 - .060 |
Industrial Static Seal O-Ring Glands
Table 2
O-Ring
Dash No.
|
W
O-Ring
Cross
Section
|
C
Gland Depth
|
Squeeze
|
G
Groove
Width
|
R
Groove
Radius
|
|
Radial
|
Axial |
|
Radial
|
Axial
|
Inches
|
%
|
Inches
|
%
|
| -008 to -050 |
.070 ± .003 |
.049 - .055 |
.045 - .050 |
.012 - .014 |
18 - 19 |
.017 - .028 |
25.5 - 38.5 |
.090 / .100 |
.005 - .015 |
| -102 to -178 |
.103 ± .003 |
.080 - .086 |
.072 - .080 |
.014 - .026 |
13.5 - 25 |
.020 - .034 |
20 - 32 |
.140 / .150 |
.005 - .020 |
| -201 to -278 |
.139 ± .004 |
.112 - .118 |
.100 - .110 |
.017 - .031 |
12.5 - 29 |
.025 - .043 |
18.5 - 30 |
.190 / .200 |
.005 - .030 |
| -309 to -380 |
.210 ± .005 |
.176 - .184 |
.165 - .175 |
.021 - .039 |
10 - 18 |
.030 - .050 |
14.5 - 23 |
.280 / .290 |
.005 - .050 |
| -425 to -452 |
.275 ± .006 |
.225 - .235 |
.220 - .230 |
.034 - .056 |
12.5 - 20 |
.039 - .061 |
14.5 - 21.5 |
.380 / .390 |
.005 - .060 |
|
