Meaning of PN and DN in Valves

Meaning Of Pn And Dn In Valve

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While working in Mechanical Industry You may have seen in DN and PN number on Glob Valve and Gate Valve In this slide we will learn what this PN and DN represent in Valve.

 

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Meaning Of Pn In ValveIt Can Handle Pressure up to 16 Bar. If we use low Pressure rating Valve at High Pressure then Valve will Fail.
Meaning Of Dn In Valve

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DN represent the nominal diameter. For 1 Inch Valve it is DN 25 for 2 Inch Valve It represent DN 50 and for 3 Inch Valve it represent DN 80.

Conclusion

 

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