The meaning of DN and PN in solenoid valve parameters

DN (Nominal Diameter) means the nominal diameter of the pipe, which is the average of the outer diameter and the inner diameter. The value of DN = the value of De - 0.5 * wall thickness. Note: This is neither the outer diameter nor the inner diameter.

Pipes such as water and gas transmission steel pipes (galvanized steel pipes or non-galvanized steel pipes), cast iron pipes, steel-plastic composite pipes and polyvinyl chloride (PVC) pipes shall be marked with the nominal diameter "DN" (such as DN15, DN50).

PN stands for nominal pressure - the compressive strength of the product at the reference temperature, in units of MPa

The nominal pressure of the valve refers to the design working pressure of the valve, and the pressure level is divided according to the standard.

The working pressure of the valve is the actual pressure of the user in the application environment and should be less than the nominal pressure of the valve.

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