检查自动排水阀前端之球阀是否打开。

Students check the automatic drain valve of the front end of the valve is open.

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介绍自动截油排水阀的技术特点、结构和工作原理，探讨该阀在油品罐区中的应用。

Introduces technical characteristics, structure and working principle of oil automatic cut off drainage valve, discusses the application of the valve in oil tanker areas.

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凝结水靠本身重力流入平衡罐，通过自动控制的排水阀，保持罐内的一定水位，形成水封。

Solidified water flows into balance jar upon itself gravity. Keeping certain water level in the jar through an automatic controlled discharge valve, which forms a water seal.

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