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A multi-port valve, and a marine propulsion unit having a multi-port valve
A multi-port valve, and a marine propulsion unit having a multi-port valve
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机译：多通阀以及具有多通阀的船用推进装置
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摘要
A multi-port valve preferably comprises a plurality of inlet ports 4, 5, 6 and one or more outlet ports 7, 8, 9. The valve has a closure member which is preferably as sphere, a cylinder or tapered cylinder disposed in a cavity 2 within a housing 1. A plurality of flow passages for fluid 10, 11, 12 are defined in the closure member, with there being one fluid flow passage for each inlet port. Rotating the closure member thus enables all inlet ports to be simultaneously connected with or isolated from the inlet port(s). In a further embodiment the passages (fig. 3a ; 7a, 8a, 9a) converge within the housing (1) so as to exit at a single outlet port (17). According to a still further embodiment, the flow passages (fig. 3b ; 10, 11, 12) converge within the closure member (3) to leave the member (3) and the housing (1) as one outlet (17b). Alternatively there may be more outlets than inlet ports. The valve may be used to drain a marine engine following capsize. A seat (fig. 1c ; 15, 16) comprising a plurality of flow passages (4b-9b) extending through it may be provided.
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