| 摘要 |
1. Safety-valve with a vertical lift of the cut-off clack-valve (9), comprising a body (1) provided with two connecting pipes (2, 3) and a control diaphragm (6) which supports the cut-off clack-valve (9), this clack-valve (9) and the diaphragm (6) being normally pressed against the seat (4) by a compression spring (11), the upper part of the body (1) comprising on the axis of the seat (4) of the clack-valve a cylindrical extension (5) inside which the control diaphragm is mounted in a groove (7), characterised in that the clack-valve (9) is connected to an operating hand-wheel (13) by a connecting rod (14) and in that an annular tongue (8) which is provided at the upper limit of the groove (7) and forms a single piece with the cylindrical extension (5) of the body is turned down onto the control diaphragm (6) by means of a tool bearing at the end of travel on the upper base of the cylindrical extension (5) of the body (1). |
