| 摘要 |
A fluid operated valve assembly is disclosed including a housing defining a cylinder, a piston arranged for reciprocal motion in the cylinder, a fluid inlet for admitting fluid into the working chamber of the cylinder to cause the piston to be displaced therein, a valve closure, a valve seat and a connector connecting the piston to the valve closure such that the closure is in an open position and the piston is in one end position and the valve closure sealingly engages the valve seat when the piston is in the other end position, the connector having a length which is variable dependent on the fluid pressure in the working chamber. |
