1. What is the allowed suit leakage for Sokol suit at 40kPa/5.8 psi.

  2. What is the allowed leak rate in IVA shuttle suits at 24 kPa/3.5 psi.

  3. What is the allowed leak rate from IVA suit helmet

  • $\begingroup$ If the leak rate is small compared to the oxygen consumption of the astronaut in the suit, it should be acceptable. $\endgroup$
    – Uwe
    Feb 11, 2020 at 9:50
  • $\begingroup$ Why did you pick 5.8 psi? Shuttle ACES suits operated at 3.67. Don't think what you want is available for shuttle suits at such a high pressure. Also, "allowed" by what? Actual numbers may be available. $\endgroup$ Feb 11, 2020 at 14:37
  • $\begingroup$ I have modified the values here. Earlier I assumed 40 kPa as inside pressure and 17 kPa as external pressure i.e. differential pressure 23 kPa only. Now I wrote it explicitly $\endgroup$
    – Abhimanyu
    Feb 12, 2020 at 15:39
  • $\begingroup$ @Uwe I doubt that uwe, because leakage is a factor factored in for deciding the oxygen tanks capacity. If leakage is more then it more oxygen need to be carried on board $\endgroup$
    – Abhimanyu
    Feb 12, 2020 at 15:42
  • $\begingroup$ Recently I heard heard from somebody that Sokol suit leakage is 500 CC/minutes (0.5 lpm). I just wanted to confirm if it correct, as for old US EVA suits the leakage was 0.2 lpm approx. $\endgroup$
    – Abhimanyu
    Feb 12, 2020 at 15:44


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