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11.0 THEORY OF OPERATION
11.1 Operational Diagram
11.2 Mixing Operation
The MAXBlend2 is designed to utilize two 50 PSIG (3.4 BAR) gas sources. The
two gas sources enter through the air and oxygen inlet connectors located on
the bottom of the MAXBlend2. Each inlet connector incorporates a 30 micron
particulate filter. Once through the filters, each gas passes through a duckbill
check valve, which prevents possible reverse gas flow from either the air or the
oxygen supply systems.
The two gases then pass through a two-stage balance regulator. The purpose
of this regulator is to equalize the operating pressures of the air and oxygen
gas sources. Once these pressures have been balanced, the gases are
proportioned according to the oxygen concentration selected on the oxygen
concentration selection knob. The oxygen concentration knob allows the
clinician to select a desired oxygen concentration from 21% to 100% O
2
.
From this point, the mixed gas flows to the outlet port.
Alarm/Bypass
1st STAGE
BALANCE MODULE
2nd STAGE
BALANCE MODULE
Proportioning
Valve
Oxygen Inlet
Audible Alarm
Air Inlet
Mixed Gas Outlet
Mixed Gas Outlet
To Flowmeter
Sensor Bleed
Manifold
O
2
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