| 摘要 |
<p>A valve comprising a housing having an inlet (4) and space therefrom an outlet (6), a passageway extending between the inlet and the outlet, and means located in the passageway for controlling the flow of a fluid between the inlet and the outlet, the means including a valve assembly (8) movable between a first open position spaced from a co-operating valve seat (10) and a second closed position at which the valve assembly sealingly engages the valve seat, in which magnetic means (9) is provided for biasing the valve stem assembly towards the second closed position. <IMAGE></p> |
