Because shaft seals may be asked to perform in extreme heat or extreme cold, there are several important thermal properties to consider when choosing an elastomeric compound for the sealing lip. These include both high and low temperature effects. The coefficient of thermal expansion must also be considered when selecting a case material.

HIGH TEMPERATURE EFFECTS
LOW TEMPERATURE EFFECTS
DIFFERENTIAL THERMAL EXPANSION

“Because shaft seals may be asked to perform in extreme heat or extreme cold, there are several important thermal properties to consider.”