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BSAC Dive Leader Training

BSAC Dive Leader Training. Oxygen Administration Equipment. Lesson Outline. Configuration of oxygen administration equipment most suitable for sport diver use Oxygen administration equipment comprises Gas cylinder Regulator Demand valve and mask ‘Pocket’ mask Reservoir mask Storage case.

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BSAC Dive Leader Training

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  1. BSAC Dive Leader Training Oxygen Administration Equipment

  2. Lesson Outline • Configuration of oxygen administration equipment most suitable for sport diver use • Oxygen administration equipment comprises • Gas cylinder • Regulator • Demand valve and mask • ‘Pocket’ mask • Reservoir mask • Storage case

  3. Gas Cylinders • ‘D’ size most convenient • 370 to 540 litres (136 to 210 bar) • Larger cylinders available but often more convenient to carry more smaller ones • Colour coding – (BS EN 1089-3) • White shoulder • Body any non-allocated colour but usually black • Pillar valve connections (BS EN 850) • Two pin index holes • Female outlet, no ‘O’ ring

  4. Regulators • Outlet pressure • Approximately 4 bar (some higher) • Constant outlet pressure • Inlet • Two index pins • Male inlet with sealing washer • Simple pressure gauge • Outlets capable of supporting: • At least one demand valve (100 to 160 litres / min. flow rate) • 10 litres/min. (minimum) constant flow

  5. Demand Valves • Provide oxygen on demand • Can be capable of flow rates of up to 160 litres / min. • Fitted with oro-nasal mask • Transparent material • Inflated or double face seal • Large/adult and small/child sizes

  6. Demand / Resuscitation Valves • Available types • Automatic • Manually controlled • Configuration suitable for sport diver use: • Manually controlled • 100 – 160 litres min. flowrate on demand • Resuscitation control limited to a maximum flow rate of 40 litres /min • Over pressure relief valves (set to a pressure of approx 45cm of water)

  7. ‘Pocket’ Masks • Central ventilation orifice • May be fitted with a porous splash guard • May be supplied with an optional non-return / exhalation valve • Transparent material • Generally have inflated face seal • Connection (with non-return valve) for constant flow oxygen tubing

  8. Reservoir mask • aka Hudson/non-rebreathing • For second DCI casualty • Gives oxygen concentration • Higher than pocket mask • Not as high as demand mask • Parts • Oxygen tubing • Reservoir • Mask • Exhaust valves • Flow 10-15 l/min • Fill bag before use

  9. Storage Cases • Storage cases should be: • Robust • Waterproof • Ideally store equipment in fully assembled state • Case must have a pressure release valve if used to store cylinder

  10. Precautions in Use • Fire risk - absolute cleanliness a necessity • Keep equipment regularly maintained • Do-it-yourself equipment or modifications aredangerous • Do not use non-standard equipment – risk of confusion

  11. Summary • Equipment suitable for recreational diver use: • Gas cylinders • Regulator • Demand valves and masks • Demand/resuscitation valves & masks • ‘Pocket’ masks • Reservoir masks • Storage case • Only use equipment produced by recognised specialists • Keep clean and well maintained • Keep equipment assembled ready for instant use

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