Will the valve DN, PN, respectively, what does this mean?
PN name (pressure nominal) on behalf of Nominal pressure
Units are MPa MPa
For example, is J41H-16C Nominal pressure 16Kgf/cm2
Per square centimeter pressure value MPa 16Kg count if the case is PN1.6MPa
The representative of the internal pipe diameter DN
Units are mm mm
DN50 example is the 50 mm
Some valve is expressed in units of inch internal diameter pipe size
1 inch = 2.54 centimeters
DN15 - 1 / 2 〃
DN20 - 3 / 4 〃
DN25 - 1 〃
DN32 - 1 1 / 4 〃
DN40 - 1 1 / 2 〃
DN50 - 2 〃
DN65 - 2 1 / 2 〃
DN80 - 3 〃
