Polytetrafluoroethylene (PTFE) is a group of thermoplastic polymers that are compatible with a wide assortment of lubricants and feature chemical resistance that is far superior to that of any other sealing lip material. PTFE has a smooth, dirt-resistant surface. Seals with PTFE lips can accommodate high surface speeds while offering extended service life. The seals can tolerate dry running and are particularly valuable in highly contaminated applications because of their excellent exclusion ability.
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