O-Rings

R.E. Purvis & Associates, Inc. offers o-rings in a variety of sizes and materials. We offer the standard ASTM 568 sizes, tube fitting boss sizes, metrics, and a host of custom sizes. In regards to material, R.E. Purvis & Associates, Inc. can supply you with an o-ring made of nearly anything from the softest of rubbers all the way to an o-ring made of steel.

 

For more information, please browse any of the useful links below:

For inch and metric sizing of standard ASTM 568 (Parker 2-XXX series) o-rings, click here.

For inch and metric sizing of boss tube fitting (Parker 3-XXX series) o-rings, click here.

For inch and metric sizing of metric boss tube fitting o-rings, click here.

For a listing of common non-standard inch and metric (Parker 5-XXX series) o-rings, click here.

Parker's O-ring Handbook offers a wealth of infomation on the use of o-rings and material selection. It offers guidance to those not familiar with the use of o-rings as well as advance seal design and compatabiliy tables. A copy of the handbook is available online in a format for easy online viewing by clicking here. If you would like to download the full handbook, the entire book is available in a single file by clicking here.

Greene Tweed offers a full line of Chemraz (perflourelastomer) o-rings and seals for superior performance in harsh chemical environments requiring clean materials. Chemraz provides superior performance in the most demanding application environments.

For a general overview of available compounds and some basic properties, click here.