Operation Principle - smaco S400 Manual Del Usuario

03

OPERATION PRINCIPLE

3.1
When the diver bites the mouthpiece and inhales, the pressure in the cavity
decreases to prompt the release valve to open downward so that the air pressure
is reduced in the primary pressure reducing valve and flows through the medium
pressure tube into the secondary breathing valve cavity and then into the oral
cavity through the mouthpiece;
3.2
When the diver bites the mouthpiece and exhales, the exhaled gas flows into the
cavity to increase the pressure in the cavity, so as to prompt the opening of the
one-way silicone gasket at the bottom of the secondary breathing valve, and the
gas is discharged to the outside through the two exhaust holes.
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