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  1. PULAOKHAO

    Permeability leak rate equation - PARKER HANDBOOK 3.12.1

    Permeability leak rate equation - PARKER HANDBOOK 3.12.1 Permeability leak rate equation = L = 0.7*F*D*P*Q*(1-S)*(1-S) Where does this equation come from I was told thin wall film; does anyone know Intuitively, this approximation has flaw since it assumes permeability only function of squeeze S...
  2. PULAOKHAO

    Any drawback to a very smooth O-ring gland for static gaseous system?

    "hydtools", yes, I am aware that dynamic seals should have surface roughness no smoother than 5 Ra but this is static
  3. PULAOKHAO

    Any drawback to a very smooth O-ring gland for static gaseous system?

    "monkeydog", thanks for prompt response. If anyone else is aware of any issue, please post. Thanks
  4. PULAOKHAO

    Any drawback to a very smooth O-ring gland for static gaseous system?

    AS-5857A "GLAND DESIGN, O-RING AND OTHER ELASTOMERIC SEALS, STATIC APPLICATIONS", Table-6, page-37, lists 32 micro-inch max for O-ring groove dia & 63 micro-inch max for groove sides. It does not lists any restrictions on the min side. Is anyone aware of any drawbacks for a radial, static...

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