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根据OSV规范4-6-4/7.5.2 Valves controlling flow to ballast tanks are to be arranged so that they will remain closed at all times except when ballasting. Where butterfly valves are used, they are to be of a type with positive holding arrangements, or equivalent, that will prevent movement of the valve position due to vibration or flow of fluids.
压载水系统如使用到蝶阀,该蝶阀应能保持其开关位置。那请问下蜗轮蜗杆传动的蝶阀,是否可以满足?
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