一、概述

手动平面阀主要用于放泄压载水舱的压载水或甲板积水，密封可靠，操作方便。

Manual flat valve is used for draining ballast water in the ballast tank or hydropsy on the deck cargo,the product has satisfactory tightness performance, and it is convenience for operation

二、基本参数

三、主要零部件材料

四、结构尺寸

五、标记示例