Composite teflon helix seal

摘要

A fluorocarbon seal including a formed resin ring element which is adapted to serve both as a primary lip and an auxiliary or excluder lip, in which at least a portion of the lip surface contains hydrodynamic formations consisting of grooves or the like indented or debossed surfaces rather than upstanding or protruding vanes or ribs, and wherein the resinous seal ring element as a whole is in the form of a generally frusto-conical ring having an intermediate portion thereof bonded by an annular collar unit to an associated casing.