With the valve in the fully closed position the stem length shall protrude a distance of at least twice that of the stem diameter above the top of the mounting flange.

在阀门完全关闭状态下，阀杆在连接法兰顶端上方需高出至少相当于阀杆直径两倍的长度。

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With the valve in the fully closed position the stem length shall protrude a distance of at least twice that of the stem diameter above the top of the mounting flange.

在阀门完全关闭状态下，阀杆在连接法兰顶端上方需高出至少相当于阀杆直径两倍的长度。

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