As we all know, the size of the valve diameter and the size of the pipeline has an inevitable relationship, usually said how big the pipe diameter (outside diameter) with how big the valve. The valve diameter needs to be calculated according to the actual parameters, generally speaking, the pipeline will be larger, the valve is actually relatively small, mainly depends on the valve position needs to control the flow size is how much, and the pipeline size only needs the flow capacity is enough.
(1) Pipe fitting size and valve diameter and inch comparison table:
(2) Valve diameter DN (nominal diameter) corresponding to the outer diameter of the pipe (mm) :
