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  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

hydrae's latest activity

  • hydrae
    hydrae replied to the thread pressure drop test nitrogen instead of helium.
    There are 2 big differences between He and N2 He has atomic mass of 4 and N2 has an atomic mass of 28 This is a 7 factor ratio in the...
  • hydrae
    hydrae replied to the thread reservoir and Booster pumps.
    Make the fill valve pressure sustaining in addition to level control. I do not know your pressure readings so as an example ( I am used...
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