Operating Nitrox SystemsOperating Nitrox Systems 11

Presented by Nuvair

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Membrane systems produce nitrox efficiently

• Compressed air flows through the membrane• Nitrogen rich gas is expelled• Oxygen rich gas is produced

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Components of the membrane system

Intake hose

Membrane

Air FilterMixing Tube

Permeate O2Rich Gas

Nitrogenrelease

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Components of the membrane system

Heater

Analyzer

Filters

Regulator

HeaterThermostat

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System Specifications

• Membrane temperature: 110 degrees F or 43 degrees C• Operating pressure: 80-170 p.s.i., 6-12 bar• Max input pressure: 300 p.s.i. or 21 bar• Air supply quality: LP Grade D, HP Grade E• Nitrox Range: 24% - 40%

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The membrane is incorporated in these systems

For dive operators who own HP compressors For dive operators

who want a complete nitrox solution

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Rotary Screw System Operation

• System is for dive operators who already own HP compressor

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Rotary Screw System Components

Control Panel

PowerSwitch

Inline Permeate O2 Analyzer Membrane

Nitrox outTo HP

On/OffSwitch

Drier on/off switch

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Rotary Screw System Components

Operation Gauge

Adjust O2 %

HP Intake

Nitrox outTo HP

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Rotary System Rear Components

Heater ThermostatControl

Pressure switch

Waste air

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Easy operation

• Always read the manual first!

• Steps vary depending on installation

• Check oil level & filters first

• Turn on drier

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Calibrate the fill O2 analyzer

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Follow the steps in the manual

• Turn on HP compressor

• Adjust fill whip allowing air to escape

• Calibrate permeate O2 analyzer

• Turn on LP compressor

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Follow all safety precautions

• Adjust input pressure to over 80 p.s.i. (5.5 bar)

• Verify thermostat operation

• Increase or decrease pressure to set final O2%

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Final adjustments• Fill O2 analyzer should

read same as inline O2 analyzer

• You are ready to pump nitrox!

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Always test the nitrox in the cylinder with an independent analyzer!

• Have the customer analyze the gas and sign for it

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Components of the Voyager (nitrox in a box!)

Fill O2Analyzer

HP FilterCannister

Fill pressuregauge

Permeate O2Analyzer

Dial-A-PressureControl

LP Filters

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Additional Voyager components…

HP Controls

LP OilLevel

HP OilLevel

Feed aircontrol

LP Gauges

TemperatureGauges

HeaterThermostat

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Using the Voyager

• Always read the manual first!

• Check oil level & filters

• Check LP feed valve is off

• Start HP compressor

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Using the Voyager• Open one fill whip -

adjust to hold 1500 p.s.i. (103 bar)

• Drain condensate• Calibrate analyzers

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Operation is simple!

• Adjust regulator initially for low pressure

• Turn on LP feed air valve

• Increase regulator pressure to 80-160 p.s.i. (5.5-11 bar)

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Operation is simple!

• Wait for O2% to stabilize on permeate analyzer

• Adjust regulated input pressure

• Wait for correct nitrox % on the fill O2 analyzer

• When O2% is correct, attach whip & fill tank!

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Always test the nitrox in the cylinder with an independent analyzer!

• Have the customer analyze the gas and sign for it

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Operation of membrane systems is easy!

• Membrane systems provide accurate nitrox mixtures.

• Membrane systems require the least amount of training.

• Membrane systems allow you to fill nitrox tanks at same rate as air tanks.

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Thank you for attending!