Parker O-Ring Handbook.pdf
Parker O-Ring Handbook.pdf
Parker O-Ring Handbook.pdf
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Static O-<strong>Ring</strong> Sealing<br />
4-20<br />
<strong>Parker</strong> O-<strong>Ring</strong> <strong>Handbook</strong><br />
O-<strong>Ring</strong> Half Dovetail Grooves<br />
Radius “R” is CRITICAL. Insuffi cient radius will potentially cause damage to the O-ring during installation, while excessive radius may contribute to extrusion.<br />
O-<strong>Ring</strong><br />
Size<br />
AS568A-<br />
004<br />
through<br />
050<br />
102<br />
through<br />
178<br />
201<br />
through<br />
284<br />
309<br />
through<br />
395<br />
425<br />
through<br />
475<br />
W<br />
Cross Section<br />
Nominal Actual<br />
1/16<br />
3/32<br />
1/8<br />
3/16<br />
1/4<br />
Special 3/8<br />
L<br />
.070<br />
±.003<br />
.103<br />
±.003<br />
.139<br />
±.004<br />
.210<br />
±.005<br />
.275<br />
±.006<br />
.375<br />
±.007<br />
Half Dovetail Grooves<br />
66°<br />
Mean Groove<br />
Diameter Coincides<br />
With Mean<br />
O-ring Diameter.<br />
G<br />
L<br />
Gland<br />
Depth Squeeze %<br />
.053<br />
to<br />
23<br />
.055<br />
.083<br />
to<br />
19<br />
.085<br />
.113<br />
to<br />
18<br />
.115<br />
.173<br />
to<br />
17<br />
.176<br />
.234<br />
to<br />
15<br />
.238<br />
.319<br />
to<br />
14<br />
.323<br />
G<br />
Groove Width<br />
(To sharp<br />
corner)<br />
.064<br />
R R1<br />
to<br />
.066<br />
.095<br />
.005 1/64<br />
to<br />
.097<br />
.124<br />
.010 1/64<br />
to<br />
.128<br />
.190<br />
.010 1/32<br />
to<br />
.193<br />
.255<br />
.015 1/32<br />
to<br />
.257<br />
.350<br />
.015 1/16<br />
to<br />
.358<br />
.020 3/32<br />
NOTE: These design recommendations assume metal-to-metal contact. In special applications, for example in the semiconductor industry, deviation from these<br />
recommendations may be necessary. When designing with Parofl uor elastomers, one should take into consideration that perfl uorinated elastomers may require<br />
more squeeze than an FKM material to obtain optimum sealing performance. To increase squeeze, modifi cations of the design recommendations shown above<br />
are necessary.<br />
Design Chart 4-5: Half Dovetail Grooves<br />
R 1<br />
Finishes are RMS values<br />
R<br />
<strong>Parker</strong> Hannifi n Corporation • O-<strong>Ring</strong> Division<br />
2360 Palumbo Drive, Lexington, KY 40509<br />
Phone: (859) 269-2351 Fax: (859) 335-5128<br />
www.parkerorings.com
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