Valve ball made of plastics

摘要

The plastic valve ball (2) comprises a composite construction unit, which has a carrying element (2c) and a surface layer (2d). A spherical valve ball (1) has a passage opening (5). The plastic valve ball is movably stored between an opening and closing position in a housing (4). The surface layer surrounds the carrying element. The surface layer is coated with a session layer as an adhesion mediator. The carrying element is filled with a cavity (8). Two bearing rings are inserted into an injection mold.