| 摘要 |
A drainage assembly (10) comprising a cylindrical outer body (11) and cylindrical basket (12) have co-operating threads (13 and 14). A slotted flow though lid (15) is hinged at (16) to the body so that the lid may be lifted to gain access to the basket. A centrally located cross bar (17) allows the basket to be rotated automatically moved axially in the direction of the arrow (18) to remove the basket from the assembly and release a basket actuated valve member (19) biased by biasing spring (20) to close off annular drainage opening (21) when the basket is removed. A ball valve at (25) may be used to shut off flow through the assembly manually using a ball valve actuator (26) independently of the basket.
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