how to test permeability of o-rings  

Posted by Maxime Belanger on December 13, 2004 at 22:42:22:

I am interested in gathering permeability data of o-ring materials with helium at room temperature, and with some Hydrofluorcarbons (HFC) refrigerants at various temperatures. What test method can be used to generate the permeability data?

The purpose is to determine how much leakage is expected to occur when testing the ass'y with Helium, and how much leakage to expect in the field with HFC refrigerant.

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