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  1. Sparks, static electricity or shock may start oxygen combustion. 

    + additional oxygen will make a fire burn much faster and more violently. 

    - If possible shut off flow of oxygen. 
    - Remove everyone who is not actively engaged in fight the fire.
    - Use large quantities of water to cool the burning material below the ignition point.
    - If electrical equipment is involved in the fire. Use carbon dioxide or vaporizing.
    - Dry chemical extinguishers: DO NOT USE WATER.
    Safety Precautions [GASEOUS OXY SYS]
  2. - aviators breathing oxygen.
  3. - process heats and cools air to remove moisture and other impurities. 
    + refined until it it 99.5% pure. 

    Colorless, Odorless & Tasteless 

    Moisture freezes @ 32 degrees F, if not removed from the oxygen system, will freeze valves & regulators. 

    Hospital oxygen is only 98% pure and welding oxygen is only about 70% pure.
    Gaseous Oxygen System
  4. - not enough oxygen in the blood stream.

    + can be corrected by breathing oxygen.
    + Different Altitudes - Different Affects 
    + Dangerous creeping on you w/o you realizing it.
  5. -  occurs when too much oxygen is lost in the body and body tissues are permanently damaged.
  6. - breathing too much; too much oxygen in the body leading to an abnormal loss of carbon dioxide from the blood. 

    - person’s body gets stiff and will “freeze”. 

    + corrected by breathing into a bag.
  7. - made of stainless steel or low alloy steel. 

    + built to carry a maximum charge of 450 psi.
    + are considered full between 400 to 425 psi. 
    + made shatterproof.
    + Painted YELLOW. 

    - Never let our systems go down to 0 PSI to prevent contamination.
    Low Pressure Gaseous Oxygen Cylinders
  8. - used in a low pressure system is made of 5/16 inch, aluminum alloy.

    + has identification tape on it. 
    + tape is color coded green & white saying “ BREATHING OXYGEN” on it. 
    - braced w/ clamps every 15 inches & at each bend throughout the sys. 

    - Should be minimum of 2 inches clearance between the tubing & cables or electrical wiring.
  9. - used in low pressure sys. are made of aluminum alloy & color coded BLUE to ID the material it’s made of ( aluminum ) 

    - 3 Distincts Sections: 

    + Pipe Thread End of the screws. : used when connecting tubing to components
    regulators/ converters etc.) 

    + Flared end connects the flared tubing 

    + Hex Portion of the Fitting (where you place a tool to remove or install it)
  10. - Used in oxygen systems that has more than one cylinder. 

    - oxygen will flow to the regulators even if one cylinder is ruptured. 
    + Allow oxygen to flow in one direction only.
    Check Valves
  11. - Used when recharging the oxygen system. 


    + usually located close to the edge of an access panel or right behind a special removable cover plate on the skin of the aircraft. 

    + spring loaded check valve that is unseated when the recharge adapter is connected to it and seats when the adapter is removed.
    Filler Valve
  12. - part of the servicing cart. 

    - you need to use it whenever you are filling a low pressure system from a high pressure servicing cart so the pressure will not bust the low pressure cylinders & lines on the acft. 

    - never will low pressure sys. from high pressure, servicing cart w/o using a pressure reducing valve. 

    + Prevents High Pressure From Bursting Low Pressure.
    Pressure Reducing Valve
  13. - two of them installed on the acft. 

    + one shows aircraft cylinder pressure and one shows system pressure. 
    - sys. pressure gauges generally installed on the oxy. reg. 
    - Most have a RED mark on the glass cover @ 450 psi to show maximum service pressure.
  14. - purpose of it is to tell you if oxygen is flowing through the regulator. 

    + does not tell you how much oxygen is flowing
    + nor does its operation guarantee that you are getting enough oxygen. 

    - indicates flow by blinking action when the user inhales through the oxy. mask. 

    - black = NO OXY 
    + white + OXY FLOWING
    Flow Indicator
  15. - works the same as low pressure sys. 

    + more oxygen can be stored in a smaller space. 
    - but stored at a higher pressure, 1850 PSI.
    High Pressure Oxygen System
  16. - made of forced seamless steel. 

    - made shatterproof by wire wrapped on the outside of the cylinder.
    + then dipped by solder. 
    - hold max charge of 2000 PSI.
    + normally served to a pressure of 1800 to 1850 PSI.
    - painted GREEN to ID them.
    - hydrostatic test every eight years. 
    + Last inspection is stamped on neck.
  17. + assembly is attached to the oxygen tubing connected to the valve outlet. 
    - automatic valve 
    + coupling unseats check valve, allowing oxygen from the cylinder to fill the oxy sys. under high pressure. 

    - spring loaded check valve
    Self Opening Valve Coupling -
  18. - manually operated 
    + should always be in the open position when it is in the aircraft. 
    - should be closed when removing or replacing parts on the oxy sys. 
    + & when the cylinder is to be removed from acft.
    Hand-Wheel Valve -
  19. - Both Valves are equipped w/ it.

    + will release the contents of the cylinder. 
    - in the event the pressure becomes excessive due to high temps.
    Fusible Safety Plug
  20. (high pressure gaseous oxygen sys.) 

    + all tubing between the filler valve and the pressure reducing valve (high pressure side) 
    - 3/16 inch copper alloy or any tubing can withstand high pressure. 

    All tubing in (low pressure side) is 5/16 inch aluminum alloy. (after pressure reducing valve)
  21. - consist of a sleeve, which is preset on the end of the tubing before the tubing is put in a flare less seat. 

    + high pressure fittings are made of steel or brass. 
    - if you over tighten this type of fitting while trying to stop a leak.
    + it will usually leak more.
    - A torque wrench should always be used with this type of fitting.
  22. - high pressure **** is hand wheel operated & separates the filler connection, from cylinders. 

    + valve must be opened when the system is being filled w/ oxygen  & is closed at all other times.

    - filler connection is used to hook the recharging equipment to the acft sys.
    Filler Valve
  23. work the same in high pressure sys as they do in low

    + but are made of steel or brass to withstand high pressure.
    Check Valves
  24. - used in the high pressure oxygen system is placed between the cylinders & the pressure reducing valve. 

    + manually hand wheel operated.
    - safety wired to the “ON” position. 
    + (in case of an emergency) valve can be closed to isolate the distribution sys. from the cylinders. 

    - also can be be closed when maintenance is done on the system. 
    + valve  should always be left in the “ON” position & safety wired.
    System Shutoff Valve
  25. - used in the high pressure oxy. sys. to  drop the cylinder pressure to a bout 400 PSI before it goes in the regulator. 

    + Do not confuse w/ the one on the servicing cart. 
    - has a relief section (in regulator) that vents the pressure overboard if the reducing section fails to work.
    Pressure Reducing Valve
  26. - is used to show cylinder pressure

    + located before the pressure reducing valve 
    - reads from 0 to 2000 PSI w/ increments of 200 PSI marked on the dial.

    Regular Gauge : SYSTEM PRESSURE

    Low Pressure: Same        High Pressure: In Tanks
  27. - lets the user know that oxygen is flowing through the regulator. 

    - when user takes a breath of oxy. , a white “flag” attached to a diaphragm shows through a glass window on the face of the regulator.
    Flow Indicators
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2014-01-23 09:44:39
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