Abstract

The binary or ternary gas mixtures used in diving can be blended either by a successive and controlled injection of the component gases into containers of constant volume, following the pressure in the containers, or by a continuous flow mixing, with the simultaneous injection of the component gases to the desired proportion, using for this devices equipped with calibrated nozzles working in the critical (sonic) range, which ensure the delivery of gaseous components at constant mass flow rates.

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