GASEOUS OXYGEN SYSTEMS:

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.

- aviators breathing oxygen.

- 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.

- 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.

-  occurs when too much oxygen is lost in the body and body tissues are permanently damaged.

- 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.

- 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.

- 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.

- 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)

- 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.

- Used when recharging the oxygen system. 

STRICTLY LOW PREESURE.

+ 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.

- 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.

- 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.

- 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

- works the same as low pressure sys. 

+ more oxygen can be stored in a smaller space. 
- but stored at a higher pressure, 1850 PSI.

- 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.

+ 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

- 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.

- Both Valves are equipped w/ it.

+ will release the contents of the cylinder. 
- in the event the pressure becomes excessive due to high temps.

(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)

- 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.

- 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.

work the same in high pressure sys as they do in low

+ but are made of steel or brass to withstand high pressure.

- 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.

- 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.

- 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

- 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.