| 摘要 |
The invention relates to a stop valve with a housing (1) forming a flow passage (1') and with a stop member (3) which can be displaced axially relative to the housing (1) and, with the interposition of a first sealing ring (2), shuts off a housing bore (11) in the flow passage (1'), the first sealing ring (2) consisting of radial sheets (20, 27) of soft material and metal sheets (21, 25) arranged between them and the soft material has an inhomogeneous structure, while the housing bore (11) is sealed off from the outside with the interposition of a stuffing-box seal (9) having at least one second sealing ring (10), the metal sheets (21, 25) having axial deformations at least in the region around the circumferential surface (22) of the sealing ring (2) in contact with the medium. Due to their positive engagement with the adjacent sheets (20, 27) of soft material, these deformations limit the free radial extent of their sliding layers to a maximum of one third of the sheet thickness. The invention also relates to sealing rings for use in this arrangement. <IMAGE> |
