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What is the nominal diameter of the control valve?
The author: Time:2019/9/19

       控制阀门的公称直径是指什么?
       公称直径就是用作参考的经过圆整的表示口径大小的参数,既不是阀门的内径也不是阀门的外径,一般指阀门的流道内径(制造允许有偏差)。用“DN"或“几分阀”表示,单位是mm或英寸,DN数值依据GB/T 1047- -2005 标准,几分阀依据英国标准。如DN200为200mm或8英寸的阀门,DN100是100mm或4英寸阀门。

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