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Transcript of Oxygen
BY: Mr. Arias & Mr. Khan Oxygen Oxygen is essential for the living process Ut to 7,000 feet above sea level the oxygen content and pressure in the atmosphere are sufficient enough to maintain almost full saturation of the blood with oxygen to ensure normal body and mental functions. Hypoxia:
deficiency in the amount of oxygen delivered to the body tissues At 5,000 feet with decreased night vision At 8,000 feet, forced concentration, fatigue and headache may occur At 14,000 feet, forgetfulness, incompetence and indifference makes flying without the proper supplemental oxygen quite hazardous. At 17,000 feet, serious handicap and collapse may occur. Do Now: What is Oxygen and how is it used throughout the Aviation industry? What type of oxygen should be used to charge an Aviators Breathing Oxygen? MIL-O-21749 OR MIL-O-27210.
These specifications require the oxygen to have no more than 2 mil of water per liter of gas. What is the difference between Hospital and Aviators Breathing Oxygen? In what ways can Breathing Oxygen systems leaks be detected? Components What should be used to clean oxygen system components? Why can’t Aviators Breathing Oxygen systems be lubricated with oil or grease? How are A.B.O. cylinders identified? What thermal expansion safety device is installed on high pressure breathing oxygen cylinders? What type of cylinders are used for A.B.O systems? What type of smoke protection device is used by the flight crew? Water content Oil and grease may ignite with fluid under pressure Cylinders are identified by their green color (high pressure) and marked “aviators breathing oxygen”
Light yellow ( low pressure)
-Anhydrous (waterless) ethyl alcohol
-a mixture of chlorinated fluorinated hydrocarbons (Freon) and isopropyl alcohol -Listening to the hissing sound of escaping gas
-Soap test (Castile soap & water)
-Visually check pressure drops -Storage systems
-nassal cannuals oxygen storage -gaseous state
-liquid state Liquid state storage -stored at -183 degree celcius or -297 degrees farenheit
-The liquid gas is passed through warming coils to convert the liquid into gas. Low pressure cylinders (400- 450 P.S.I.) High pressure cylinders (1800- 2200 P.S.I.) solid state oxygen used on general and comercial aviation O2 is generated through a chemical reaction Continuous flow Diluter demand -Fixed flow system
-aneroid control Fixed flow system Delivers oxygen continuously once the system is activated
-unable to aoutomaticaly adjust to the changing pilots needs. manual adjustment incorporates a manual adjustment knob to allow the user to increase or decrease the oxygen flow rate corresponding to aircraft altitude aneroid control uses an anaroid control to automatically increase or decrease the oxygen flow rate corresponding to aircraft altitude -furnishes oxygen when the user inhales
-incorporate an automix lever
-uses an anaroid control to automatically adjust the amount of oxygen delivered pressure demand regulator works the same as a diluter demand regulator but it delivers oxygen under positive pressure to maintain blood oxygen saturation at higher altitudes (certified up to 45,000 ft mls A special smoke protection safety mask with an eye protector in a clear visor together with a proper supply hose and head strap. A blowout disk that ruptures when pressure rises to an unsafe value.
Compressed gas containers should not be subjected to atmospheric temperatures above 130 degrees F. A flame shall never be permitted to come in contact with any part of a compressed gas container. Containers shall not be stored near readily ignitable substances such as gasoline or waste papers, or near combustibles including oil. Containers shall not be exposed to continuous dampness nor be stored in the sun. storing Handling Compressed gases shall be handled only by properly trained persons. The user responsible for the handling of the container and connecting it for use shall check the identity of the gas by reading the label or other markings on the container before using. If container content is not identified by marking, the container shall be returned to the supplier without using it. Container color shall not be relied upon for content identification.
Connections that do not fit should not be forced. Threads on regulator connections or other auxiliary equipment should match those on container valve outlet. Regulators, gauges, hoses and other appliances provided for use with a particular gas or group of gases should not be used on containers containing gases having different chemical properties unless information obtained from the supplier indicates that this can be done safely. As an example, only pressure-regulating devices approved for use with oxygen should be used in oxygen service.
Container valve should be opened slowly for safety. Valve outlets should be pointed away from yourself and other persons. Valve wheels or levers should not be hammered in attempting to open or close the valve. Putting in Service
Containers must be refilled by a gas manufacture, gas distributor, or someone qualified in the refilling of aircraft oxygen cylinders. The markings stamped into cylinders shall not be removed or changed. The user shall not deface or remove any markings, labels, decals, tags or stencil marks applied by the supplier and used for identification of content. Filling.
1. Constant flow.
2. Altitude adjustable.
3. Altitude compensating. Types of Oxygen Systems
The most common and lowest cost system found in general aviation is the constant flow type. The basic system includes three parts: the cylinder(s), regulator, and manifold system.
The cylinder is common to all systems. It can be made from steel, aluminum, or composites. The tank pressure is usually less than 2,200 pounds per square inch (psi). The regulators which step down the pressure from 2200 psi to 20-75 psi can be attached separately from the cylinder(s) or directly screwed onto the cylinder. Most regulators are of the diaphragm type. They typically hold a constant output pressure between 20 and 75 pounds, depending on the manufacturer constant Flow Systems An altitude adjustable oxygen system is similar to the constant flow system except there is an adjustable control to set the necessary flow. This adjustment is accomplished by turning a control knob so a reading on a gauge, calibrated in altitude, is the same as the aircraft's altimeter setting. There is a significant saving in oxygen, since you are not wasting the excess flow of oxygen. Altitude Adjustable Systems
The altitude compensating system is similar to the altitude adjustable systems except that the adjustment is done automatically instead of manually setting the flow rate to an altitude gauge. Altitude Compensating Systems