| 摘要 |
The present invention comprises an outlet valve (3) adapted to a bottom part (1 a) of a vessel (1), in order to be able to present a discharge of a liquid (4) kept within the vessel, and which outlet valve (3) comprises a valve cone (3a) and a vessel-allocated valve seat (3b). By means of an operating device (5), in the form of a piston-cylinder arrangement, the valve cone is movably arranged between a first position, sealingly abutting against the valve seat, and a second, valve-opening position oriented away from the valve seat, or vice versa. Said valve cone (3a) co-operates with a piston (5a) appurtenant to the operating device, which piston divides the inner cavity of the cylinder into two chambers (51, 52), with each of said chambers being, via a conduit and valve each, connected to a source of compressed fluid. Said valve cone (3a) is given a shape where the opening-peripheral edge surface (31, 32) of which is adapted to serve as a sealing surface against the valve seat (3b) and that the shape in other respects is dimensioned in order to be able to surround and contain said operating device (5). |
