| 摘要 |
The ballast pumping system, for pumping water ballast to or from a series of ship ballast tanks(17,18,19,20), has a submerged pump(21) located in one(19) of the tanks and a sea chest(23) provided in the ballast tank together with the pump. Piping interconnects the pump and the sea chest and also connects the pump to each of the bottoms of the ballast tanks. Pref. the piping includes a main pipe connecting with the pump and branch pipes interconnecting the main pipe and each of the bottoms of the ballast tanks.
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