该欧洲标准规定了要求，并描述了检查和止回阀的测试方法。本标准适用于安装在集装箱阀和歧管之间的止回阀和安装在先导管路中的止回阀，但这些阀门与非电气控制装置相结合进行了测试。止回阀和止回阀应允许沿流动方向通过，并防止反向流动

This European standard specifies the requirements and describes test methods for check and non-return valves. This standard is applicable to check valves installed between container valve and manifold and non-return valves installed in pilot lines except those valves, which are tested in combination with non-electrical control devices. Non-return and check valves shall allow the passage in the direction of flow and they shall prevent flow in the reverse direction.