| 摘要 |
<p>The present invention relates to a non-return valve for a liquid piping system, comprising a valve housing and a valve member, which is movable between a first position, in which a flow path is blocked, and a second position, in which the flow path is un-blocked. The non-return valve comprises a non-return valve attachment comprising a housing, a piston assembly and an energy storing means, the piston assembly being axially movable in relation to said housing between a first active position, and a second position. In said second position the fluid pressure of said liquid drives the piston assembly against the action of the energy storing means away from said first position, such that the valve member is movable into said second position of the valve member.</p> |
