Successful seal performance requires careful consideration of process conditions, elastomer properties and seal design. A deficiency in any one of these areas will result in a reduction of seal service life. If a seal failure does occur, a systematic approach should be taken to determine the root cause of the failure.

Causes of Seal Failure
Chemical attack Thermal attack Process pressure Mechanical failure Seal design Groove dimensions O-ring size Elastomer compound

Samples of failed O-rings were submitted to DuPont Performance Elastomers for evaluation. Corrective action as well as suggestions to improve seal performance were provided.

For help in evaluating your sealing performance, DuPont Performance Elastomers offers assistance in compound selection and seal design for Kalrez® parts. Before an in-depth analysis of O-ring failure can be provided, application data, such as process chemicals, temperatures, etc. must be supplied.

For elastomer compatibility information visit our web site's Chemical Resistance Guide at www.dupontelastomers.com/crg or call DuPont Performance Elastomers at 800-853-5515.