DN20-6 points
Dn25- 1 inch
DN32- 1 1/4 inches
Dn40- 1 1/2 inches
Dn50-2 inches
Dn65-2 1/2 inches
DN80-3 inches
Dn 100-4 inches
DN is the nominal size, indicating the size of the valve in millimeters. For example, DN 100 means that the size is100 mm.