| 摘要 |
The floating valve device for preventing the air inlet in droppers (1) for intravenous infusion, according to the present invention, consists of a closing valve (6) realized with a spheric element, or of any other suitable shape, floating in the infusion liquid; due to the progressive sinking of the liquid, said valve is brought in correspondence of the end hole (7) of said dropper, closes and seals it thus preventing a further lowering of the liquid and therefore preventing the air inlet in the system.
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