Dichtung

摘要

A balance seal for a valve, said seal comprising an annular seal element (1) retained within a valve housing (2). The seal element (1) has a seal well (4) which links with the pressure on one side of the valve to urge a flexible seal leg (5) with a foot (5A) into engagement with a moveable valve plug (7). The seal leg (5) is prevented by an annular retainer (6) from over-deflection.