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| Groove
Design |
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The details
given below provide a reasonable basis for calculating O- Ring
groove details.
The selection of O-Ring is up to the individual designer, bearing
in mind the type of application. The largest O-Ring cross section
diameter should be used, particularly for dynamic applications.
There are four basic types of housing for which O-Rings can
be used, as follows:- |
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Type 1 - Piston sealing |
Type 3 - Axial sealing (internal
pressure) |
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Type 2 - piston rod sealing |
Type 4 - Axial sealing (external
pressure) |
| The following
information will enable the user to calculate seal housings. |
Basic
O-Ring
Please note d1 and d2 refer to the inside diameter and cross
section diameter as shown in the diagram to the right. |
Click to enlarge |
Type 1
- Piston Sealing
Select an O-Ring where d1 + 2xd2 is equal to, or slightly smaller
than the cylinder diameter d3. Note that the stretch of d1 should
not exceed 5%. Housing inside diameter d5 is calculated as follows:-
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d5 max = d3 min -2(gd min) |
d5 min = d3 max - 2(gd max) |
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Click to enlarge |
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