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  1. O

    pressure drop test nitrogen instead of helium

    Maybe I asked wrong question. All my line valves also designed for helium gas. Nominal working conditions of line such as 5 bar, 10g/s helium but I don't have helium supply, I have nitrogen, then I will test my valve by nitrogen gas on same volumetric flow and calculate capacity. Is it good...
  2. O

    pressure drop test nitrogen instead of helium

    Hi I wonder something, I have an valve working with helium gas but ı can not test with helium right now. When ı change the fluid by nitrogen. How can I verify actual the pressure drop if I do my tests by helium gas.

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