| 摘要 |
FIELD: machine building.SUBSTANCE: invention refers to valve engineering and is designed to shut off flow passage of pipelines operated under high working pressures. A valve comprises a circular casing (101) with a throttle flap (102) and a ring metal gasket set in-between and placed in a saddle formed in one of the said elements while the other forms a seat (102) inclined in respect to the gasket axis. The side surface of a dynamic sealing element (12) of the gasket is in contact with the seat (102) in the closed position of the valve. The dynamic sealing element (12) of the gasket is connected to a resilient static sealing element clamped in the saddle, by a flexible sheet. The dynamic sealing element (12) comprises the first part on the side of the static sealing element contacting with the saddle, and the second part on the side of the seat (102) where a gap between the saddle and the main surfaces of the dynamic sealing element is provided when the dynamic sealing element is distanced from the seat (102). The flexible sheet comprises two branches with a ring in-between. There is a gap between the ring and each of the branches when the gasket is not affected by the pressure in the direction of its axis.EFFECT: increased reliability of valve operation.11 cl, 14 dwg |
