公称通径

公称通径

1

与阀门将要安装的管道的公称通径相同。

Same as the nominal size of the pipe into which the valve will be installed .
2

GB/T1047-1995管道元件的公称通径

Nominal size for pipe components
3

然后，根据这些数据结合流量比率在的流量表中选择适当的公称通径的阀门。

This information is then applied to the flow rates on the following chart to determine proper valve size .
4

标准（普通）流道球阀的流道直径小于管道的公称通径，但是与截止阀相比，仍然具有好的多的流动效率。

Standard ( conventional ) port balls are up to one pipe size smaller than nominal pipe size , but still have significantly better flow than globe valves .