| 摘要 |
<p>"ANNULAR SEAL GASKET FOR A SHUT-OFF BALL VALVE" A main annular gasket for hermetically sealing a shut-off ball valve, constituted by an elastomer of substantially triangular cross-section with rounded vertices and a curved base, and which is retained in a front cavity, also of triangular crosssection, in the annular floating seal member of said valve by means of a metal retaining ring.</p> |
