| 摘要 |
One embodiment provides a valve assembly for selectively sealing a drainage aperture. The assembly is configured for seating within the drainage aperture such a flow of matter that would otherwise enter the drainage aperture passes through the valve assembly prior to release into a wider drainage network. The valve assembly includes a diffuser component for defining a primary chamber. The diffuser component includes one or more apertures formed therein for passing a portion of the flow from the primary chamber to a secondary chamber. The position of the one or more apertures defines a lower portion of the primary chamber in which sediments are collected. A body component defines the secondary chamber, the body component being positioned relative to the diffuser component to receive the portion of the flow from the primary chamber. The body component includes a sealing assembly configurable in a first configuration in which fluid material in the secondary chamber is permitted to egress form the valve assembly under influence of gravity, and a second configuration in which material is not permitted to egress form the valve assembly under influence of gravity thereby to seal the drainage aperture.
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