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  1. Gerry02

    O-ring permeability in vacuum

    Hi, Thanks for your response It is a static face seal. Sealing from water (cold) to vacuum is not something we usually do and when you compare the Permeation Coefficients of water to other gases it is much higher and therefore something I would like to evaluate first. I will do as you say and...
  2. Gerry02

    O-ring permeability in vacuum

    I am trying to calculate what the effect on vacuum would be from an o-ring sealing water - vacuum for different o-ring materials looking specifically at permeation. I found the following formula for calculating o-ring permeability: Q = K A (P1 - P2) / D Q is the permeation rate (cm3/sec) K...

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