BILGE DRAIN VALVE

摘要

A drain valve for a vessel having a bilge (4) which is elevated above external water level when the vessel is floating in unladen condition. The valve comprises a drain cylinder (1) located in a drain port (2) and attached at its upper end to the bilge; the cylinder axially containing a spindle bearing (14) in which is slideably located a spindle (20) of a buoyant closure member (32) engageable with the lower end of the cylinder. Opening and closing of the valve is controlled by the pressure differential existing between external and internal water levels.