Page 4 of 13
* PROVIDES CONSTANT
FLOW OF 1.6 LITERS
* PROVIDES MINIMUM
DEMAND FLOW OF
DEMAND REGULATOR
BREATHING BAG
* 110 LITERS
* MEDICAL GRADE OXYGEN
* D.O.T. APPROVED
* REFILLABLE BY OCENCO
* 5000 P.S.I. TEST
* ALUMINUM CYLINDER
OXYGEN BOTTLE
BREATHING BAG
* VOLUME - 5 LITERS
PRESSURE GAUGE
* VISIBLE DURING USE
* READS 2000-2500 PSI WHEN CHARGED
TO 100 PSI
PRESSURE REGULATOR
* REDUCES PRESSURE
* BOTTLE PRESSURE
RELIEVES AT 4800
FRANGIBLE DISC
* SAFETY RELIEF
PSI
* ACTIVATES SYSTEM
* PERMITS OXYGEN
ON-OFF VALVE
CONSERVATION
ON
PRESSURE OF THE
* RELIEVES EXCESS
RELIEF VALVE
PER MINUTE
* REDUCES DEAD SPACE
* CONTROLS INHALATION
MOUTHPIECE & VALVE ASSEMBLY
AND EXHALATION
* REMOVES CO
SCRUBBER
2
40 LITERS PER MINUTE
1) Compressed Oxygen Supply Circuit
Medical grade oxygen is stored in a DOT approved refillable oxygen bottle that has been pressurized
to 2250 psi and holds 110 liters of oxygen. The oxygen flow is controlled through a series of valves
and is activated by turning the ON/OFF valve counterclockwise. The pressure gauge is visible at all
times. The oxygen moves through the ON/OFF valve into a pressure reducing regulator that reduces
the oxygen pressure to 100 psi. The oxygen then passes from the pressure-reducing regulator
through a hose and into the demand regulator. The demand regulator provides a constant flow of 1.6
liters per minute with a minimum of 40 liters per minute upon demand. The oxygen then moves
through an additional hose from the demand regulator to the breathing bag.
2) Closed Breathing Circuit
The breathing bag is the reservoir of breathable gas and is constructed of durable urethane coated
nylon. Oxygen is inhaled from the breathing bag through an inhalation tube and mouthpiece. The
expired breath moves through the mouthpiece and to the CO2 scrubber through an exhalation tube.
The CO2 scrubber is constructed of steel with a lithium hydroxide bed to remove CO2 from the
expired breath. The scrubbed breath then re-enters the breathing bag through a tube connected to
the bottom of the scrubber and is mixed with fresh oxygen. A relief valve is located in the center of
the breathing bag to vent any excess pressure and to maintain the exhalation pressure of the
breathing circuit within safe limits.
EBA-75 FUNCTIONAL DIAGRAM
