Ballast for cruising cabin is with ventilative head in pressure vacuum

The utility model relates to a ballast for cruising cabin is with ventilative head in pressure vacuum, including the body urceolus of cuboid cavity, install the body on the upper and lower bottom surface of body urceolus respectively, body outside terminal surface be the flange face, and the connector of lower bottom surface flange joint ballast tank is gone up and is installed sealed the apron onthe flange, its characterized in that, the side -mounting of body urceolus has the breather pipe, installs the body inner tube of cuboid cavity in the body urceolus, the inner cavity unicom of breather pipe and body inner tube, form vertical isobaric passageway between the left and right medial surface of the left and right side body urceolus of body inner tube, open the upper and lower bottom surface of body inner tube has the vent, and it has upper and lower shrouding to cover respectively on the vent, upper and lower shrouding is respectively through guider direction, vertical removal in the body urceolus, placed