Elastomeric seal requirements in centrifugal compressors are generally handled by O-rings. Since compressor applications seldom involve pure gases or fluids, selection of the proper O-ring material can become quite difficult. Carefully evaluate the operating environment, considering factors such as temperature, pressure, and fluid composition (with special emphasis on corrosiveness of the gas).
Operating experience in the same or similar service is of prime importance.
Figure 200-76 provides “application charts” for typical O-ring materials.