Abrasion

Failure Pattern: Occurring primarily in dynamic seals involving reciprocating, oscillating, or rotary motion, this failure pattern can be identified by a flattened surface on one side of the O-ring's cross section.

Problem Sources: Metal surfaces too rough (acting as an abrasive)... Metal surfaces too smooth causing inadequate lubrication... Poor lubrication... Excessive temperatures... System contaminated with abrasives.

Suggested Solutions: Use recommended metal finishes... Provide adequate lubrication (consider internally-lubed O-rings)... Check material compatibility with system temperature... Eliminate abrasive contamination with filters and/or wiper seals... Consider change to a more abrasive resistant O-ring material such as carboxilated nitrile or urethane (see Material Selection Guide).