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Basic Nitrox Theory - Review

Basic Nitrox Theory - Review. Introduction. We will cover Nitrox basics Dalton’s Law Pressure ‘T’. Basics. Air Oxygen 21% Nitrogen 79% Other gases <1% Nitrox mixes DNA EAN. Dalton’s Law. Dalton’s Law states:

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Basic Nitrox Theory - Review

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  1. Basic Nitrox Theory - Review

  2. Introduction • We will cover • Nitrox basics • Dalton’s Law • Pressure ‘T’

  3. Basics • Air • Oxygen 21% • Nitrogen 79% • Other gases <1% • Nitrox mixes • DNA • EAN

  4. Dalton’s Law Dalton’s Law states: ‘in a mixture of gases each gas exerts a partial pressure in proportion to it’s percentage in the mixture’ • Determines gas in mix • Remaining gas in mix E.g. In air pPO2 = 0.21 In EAN32 pPO2 = 0.32

  5. pPg Fg P The Pressure ‘T’ • P = Pressure • Fg = Decimal fraction gas in mix • pPg = Partial Pressure gas pPg = Fg x P Fg = pPg/P P = pPg / Fg

  6. Pressure ‘T’ Example: Oxygen in EAN36 filled to 200 bar? Fg = 0.36 P = 200 pPg = 0.36 x 200 pPg = 72 bar of oxygen

  7. Summary • Reviewed: • Nitrox basics • Dalton’s Law • Pressure ‘T’

  8. Questions?

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