Failure Pattern
Explosive decompression is marked by random short splits or ruptures going deep into the O-ring's cross section. When the O-ring is first removed, the surface may also be covered with small blisters.

Problem Sources
Absorption of gas by the O-ring while operating in high-pressure conditions. Subsequent rapid decrease in system pressure traps gas within the O-ring's micropores, causing surface blisters and ruptures as the gas escapes.

Suggested Solutions

• Increase time for decompression
• Increase material hardness to 80-95 durometer range
• Reduce O-ring cross sectional size
• Specify a decompression resistant material, such as nitrile

O-RING RULE OF THUMB #12

When it is said that an elastomer is good for an application it is meant that some compounds which include that material are acceptable. Not All. For instance, some compounds of EP are good for brake fluid applications, but most are not acceptable. » Learn More