Dual Lip Crimped Case Seal in High- Speed Rotary Vacuum Application While reciprocating applications can certainly test seals to the edge of capability, rotary applications can present the greatest challenge to seal integrity and wear life. Unlike reciprocating configurations where the seal acts on a different part of the shaft or bore throughout its operating range, rotary seals must operate on the same sealing area continuously. This makes things like heat rejection much more difficult — especially in unlubricated or dry running applications. Extreme localized heating can have negative affect on both seal and hardware life. Rotary applications also pose sealing difficulties due to the fact that surface speeds can be much higher than in reciprocating systems. A simple electric motor can o

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