O Ring Boss Seal Design

The o ring in the face of the straight thread male end seals against the flat face female seat and is mechanically held in place by a swivel nut.

O ring boss seal design.

The design of the groove where the o ring sits plays a major role in how the o ring performs its sealing role. In order to seal properly the o ring has to deform in the application by being compressed and stretched in any number of ways. O ring sizes are detailed in sae j1926. O ring face seal orfs sae j1453 this connection is designed for leak free use to 6000 psi.

Both of these bosses use the same o ring but parker seal. 4 5 boss seals the as568 901 through 932 o ring sizes parker s 3 series are intended to be used for sealing straight thread tube fi ttings in a boss. There are industry standards for boss fittings with a series of o rings corresponding to each boss size. A standard application for an o ring is sealing a tube fitting.

Designing the parts of an application where o rings will be applied is broadly termed o ring groove design. Boss seals the as568 901 through 932 o ring sizes parker s 3 series are intended to be used for sealing straight thread tube fittings in a boss. These charts list port dimensions per as5202 and j1926 and fitting ends per as4395. As4395 is a fitting end that corresponds with as5202 bosses.