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Home » Technical » Design Recommendations » Groove Design Chart for Four-lobed SealsTM

Groove Design Suggestion for Four-Lobed Seals

Because of their unique four-lobed geometry, four-lobed seal grooves are different than those for O-Rings. Generally, four-lobed seal grooves are deeper since less squeeze is required to create a positive seal. Four-lobed seal grooves are also more narrow due to their ability to resist “spiral failure” better than O-Rings do. The following chart presents general recommendations for four-lobed seal grooves.

Seal No. Cross-Section Depth (dynamic) Depth (static) Width
004 thru 050 .070" ± .003" .060"/.062" .050"/.057" .080"
103 thru 170 .103" ± .003" .093"/.095" .088"/.090" .115"
204 thru 276 .139" ± .004" .127"/.129" .121"/.123" .155"
312 thru 382 .210" ± .005" .195"/.197" .187"/.189" .240"
425 thru 464 .275" ± .006" .255"/.257" .243"/.245" .310"