What's the inside diameter of the valve body DN40?How do you calculate this value? Do you have a formula? Thank you
DN means nominal diameter, and 40 means path size 40mm.
If the necking valve, necking is generally not less than 0.8, so the valve must also be based on the specific circumstances, but whether it is the path or necking, the inner diameter of the interface pipe is generally 40.
Add DN, nominal diameter, nominal diameter is an approximate inner diameter of the pipe, not just the data, only shows that the inner diameter of the pipe in the vicinity of 40, there is 40, so this value is just a number, and for the valve diameter is 40, if the valve is full bore diameter of about 40,
