Stephan Alia - Gas Supply and Patient Interface; Gas Supply Systems and Control

®
3 Components and functions
© F. Stephan GmbH SA-112-0106V1.0-WEM-GB 29
3.3 Gas supply
The oxygen concentration and the flow are adjusted by the double
flowmeter.
Fig. 21: Double flowmeter
This means that the ventilator can be used with just one supply gas
respectively with the internal compressor.
The output pressure is 300 mbar.
The external gas supply is provided by the coded "NIST" resp. "DIN" gas
inputs for O
2
and AIR.
The gases must be dry and free of oil and dust.