| 摘要 |
The invention relates to piping equipment and can be used as a closure or regulation equipment in pipes. The inventive structure of the valve greatly facilitates the replacement of a throttle and prolongs the active life of the spherical valve. The spherical valve includes a housing with a side opening, a spherical plug and a housing lid. Seats are arranged in housing borings. A removable throttle is mounted in the opening of the spherical plug; the removable throttle is sealed in respect with the spherical plug. A plug is mounted in the opening of the lid of the housing, which is provided with a return valve. The external terminal surface of the removable throttle is convex and has a common spherical surface with the spherical plug; the throttle pipe of the removable throttle is made of ceramic, the housing is provided with an additional side opening, and a plug is mounted in the additional side opening of the housing. The central opening of the spherical plug may have a shape of a stepless cylinder, and in that case the external terminal surfaces of the housing and the housing of the removable throttle are concave and form a common spherical surface with the spherical plug, the housing of removable throttle being made of plastic. |
