Tubular sealing element for dosing piston, has rigid ring for supporting thin sleeve through O-ring joint coaxial to ring, where sleeve comprises central portion exteriorly provided with annular protrusion

摘要

The element has a rigid ring (2) for supporting a thin sleeve (5) through an O-ring joint (4) coaxial to the ring. The sleeve has a central portion (6) exteriorly provided with an annular protrusion (8) and two end portions extending on both sides of the central portion and folded towards an axis of the ring. The joint is supported against an internal surface of the central portion, and annular lips cover the end portion of the sleeve.