Test the oxygen regulator

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We will need to do some flow rate testing in order to verify the design.

The tests will use an air source set to 1 barG and should be instrumented with pressure gauges either side of the flow regulator.

The test setup will look something like this.

Or if using a differential pressure gauge something like this.

The test should be done under a number of conditions, the test inputs are the pressure of the inlet air and the test outputs are the flow rate.

• Nominal 1 bar with a short length of hose to atmosphere.
• A reasonable tolerance either side of 1 bar (ie what sort of accuracy is the gauge on your average oxygen bottle good for and try to mimic that sort of variance)
• Nominal 1 bar with a significant length of hose to atmosphere, on the order of 2 meters or so.
• A test could be performed with a suitable oxygen mask, it might be interesting to see what sort of back pressure the mask on someones face would result in.

The flow rates at the nominal condition will allow us to double check the orifice sizing and use a more correct pressure drop in the flow rate formula.

The other test conditions are to verify the device will deliver close to the nominal rating.