| 摘要 |
The ball valve (10) comprises a housing (12) with at least one opening (14,16) with a sealing element (80,82), and a closing organ (32) with at least one sealing surface (57,59). A least one sealing surface is formed as a top surface of a connected sealing segment (54,56). One sealing surface is made from a metal with a high surface finish, and a main casting (48) is made from a plastic material with a low specific weight
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