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20 Cards in this Set
- Front
- Back
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513 GAS SUPPLY
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513 GAS SUPPLY
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PSIg
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Pounds per sq inch gauge
The difference between measured pressure and surrounding atmospheric pressure. Most gauges read zero at atm pressure. |
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PSIa
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-Pounds per square inch absolute
-PSIg + local atm pressure -Based on reference point of zero pressure for a perfect vaccum. |
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Two regulatory agencies to keep in mind:
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FDA: enforce medical purity
DOT: for manufacturing, labelling, filling, transporting, etc... |
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Pin Index Safety System (PISS)
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1 and 6 are most exterior
1,5 Air 2,5 O2 3,5 N2O |
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What's a cylinder gasket?
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It's a flat donut ring that goes over the Yoke inlet.
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Two main components of the cylinder:
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1. regulator
2. pressure relief valve |
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How many liters of O2 and N2O are in E tank?
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O2: 660L
N2O: 1590L NOTE: H tank: 6900L O2 and 15,800L N2O |
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International and domestic gas tank colors:
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Domestic/international
O2: green/white Air: yellow/white and blue N2O: blue/blue He: brown/brown Heliox: brown & green/brown & green CO2: gray/gray N2: black/black |
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Total O2 Consumption
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Total O2 consumption = FGF + Min Ventilation
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O2 Time Remaining equals?
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Residual / consumption
Residual is the vol in liters remaining after certain amount of pressure used. NOTE: 660L for full O2 tank and 1590L for N2O Total consumption is FGF + Min Ventilation |
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N2O tank
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Is consisted of both gas and liquid inside tank.
PSI will remain at 745 until liquid runs out. When the liquid runs out, then it will behave like that of O2--> becomes directly proportional. |
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How much does an E tank weigh?
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14 kg
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When dealing with mass of tanks, use this eqtn:
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M1V1 = M2V2
M2: molecular weight 44g/mol for N2O or 32 g/mol for O2 V2: 22.4L at STP |
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Pipeline pressure
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50 PSIg
Primary source |
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Pipeline components
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1. supply sources
2. connections 3. pressure relief valve 4. shutoff valves 5. alarms 6. end points |
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Pipeline supply sources for O2, air, and N2O?
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O2 is supplied as frozen liquid
Air: is made or produced N2O: comes in banks of cylinder. Next tank is used when previous one goes empty. |
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Pipeline connections
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Using the diameter index safety system (DISS).
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Shutoff valves
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Isolate specific piping system areas without turning off entire system
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FiO2 equation
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FiO2 = [O2 (L/min) + Air (.21)] / Total gas flow
For N2O, omit Air portion. |
