| 摘要 |
The invention relates to a fluid cutoff device in a line, characterized in that it comprises two bushes (1, 2) interconnected by means adapted to determine their relative motion with at least one axial component, each having a connection (1a, 2a) to a branch of the line and comprising a shutter (8, 11) pushed by a spring (9, 12), in a position of mutual spacing of the bushes (1, 2), against a sealing surface (10, 13) comprised within said bush (1, 2) so as to achieve the cutoff of the fluid, at least one of the shutters (11) being adapted to make contact with an abutment in the position of maximum mutual approach of the bushes (1, 2) so as to provide the separation from the sealing surface (13). |
