| 摘要 |
<p>A valve for use in controlling the flow of liquid out of a container, the valve comprising a valve body ( 14 ) having an inlet ( 15 ) and an outlet ( 16 ) for liquid, a valve seat ( 17 ) and a valve member ( 18 ) movable onto the valve seat ( 17 ) to close the valve, the valve also having a secondary seal in the form of a barrier member ( 25 ) positioned to prevent any leakage of liquid from the valve outlet. Such a valve is particularly effective for use with a container such an ISO container, which is going to be transported over a long distance, for example by sea The secondary seal prevents any leakage over a long period of time, thus reducing problems associated with aggressive liquids, for example corrosive liquids.</p> |
