O Ring Boss Seal Design

A standard application for an o ring is sealing a tube fitting.

O ring boss seal design.

All seals is a world leader in supply of high quality o rings seals engineered rubber and plastic products which serves the sealing needs of clients since 1958. 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. 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. The design of the groove where the o ring sits plays a major role in how the o ring performs its sealing role.

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. O ring face seal orfs sae j1453 this connection is designed for leak free use to 6000 psi. In order to seal properly the o ring has to deform in the application by being compressed and stretched in any number of ways. There are industry standards for boss fittings with a series of o rings corresponding to each boss size.

Both of these bosses use the same o ring but parker seal. Design table 4 3 and design table 4 4 show the two standard boss designs that are used for this purpose. As4395 is a fitting end that corresponds with as5202 bosses. O ring sizes are detailed in sae j1926.