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Commonly referred to as a Cup seal or Dish ring our KB16A design is a single acting/uni-directional seal with a positive, flared lip design to provide good dynamic sealing force.

The Cup seal is traditionally seals from one direction only, it is generally returned to position by a spring situated on the none-pressure side.

The KB16A is useful in friction critical applications due to its flexible low contact sealing lip and radiused back heel which helps preserve a fluid film on the cylinder bore.