Voyager IV
Nitrox System
Nuvair www.nuvair.com
Page
23
15.0 Producing Nitrox
Before using your Nitrox System to pump Nitrox, test a sample of the Nitrox produced using
the Air/Nitrox Quality Analysis Kit provided to verify compliance with CGA standards.
Quarterly testing is mandatory once the System is operational
.
The equipment you will be using to manufacture Nitrox (oxygen rich air) will expose you to
both low and high pressure gas. Gas, even under moderate pressures, can cause extreme
bodily harm. Never allow any gas stream to be directed at any part of your body.
Do not change the temperature setting on the Thermostat Control without contacting Nuvair.
Changes in temperature settings may cause Membrane damage. A damaged membrane will
not produce the correct Nitrox mixture which can lead to severe personal injury if the gas is
used for diving purposes without proper analysis.
15.1 Flow to Membrane and Setting Proper Pressure
The Membrane System feed air pressure determines the %O
2
of the Nitrox mixture. As pressure is
increased, a higher %O
2
Nitrox is pumped. As pressure is decreased, a lower %O
2
is pumped.
1) Increase pressure by slowly turning the regulator Knob CW while monitoring the LP Pressure
Gauge and Permeate Oxygen Analyzer. As the pressure rises, watch the corresponding increase
in the analyzer %O
2
reading.
2) Increase or decrease pressure slowly until the Permeate Oxygen Analyzer displays the %O
2
desired in the final Nitrox mixture.
♦
Regulated Membrane System pressure range should be
80– 175 psi(11-12 bar), depending on Nitrox %O
2
being
produced.
♦
Heater temperature range should be 105-120 ºF (40-49 ºC).
15.2 Final Adjustments Before Pumping Nitrox
1) As the Nitrox initially makes its way through the running HP
Compressor, the %O
2
reading on the Fill Oxygen Analyzer will slowly
increase to read approximately the same %O
2
as the Permeate
Oxygen
Analyzer. This should happen within 3-5 minutes.
2) When the two analyzers read /- 1%, make any final
adjustments to the Membrane System feed air pressure necessary to
obtain the exact Nitrox %O
2
desired as indicated on the Fill Oxygen
Analyzer.
3) The system is now ready to pump Nitrox.
4) Now you’re ready to close Bleed Valve and open Storage System.
Fill Oxygen Analyzer
Permeate Oxygen
Analyzer
