Quote: (Originally Posted by
jmurba)
As for the voyager I still don't understant the working principle and they don't explain it simply on their site, saying that it is a scr/mccr is not clear enough for me .
anyway if they don't want to explain this their problem, it does not mean that it is a bad system, but I would have liked to understant.
anyway one more mystery
No mistery at all. The same needle valve can restrict the flow from 0.5 to more than 25 l/sec. In the lower range (0.3-1.2) you fed it with pure oxygen and you use it as CCR like the Pelagian, in the higher range (5.0->25) you fed it with nitrox and you use it as SCR like the Azimut.
Obviously you need to preset the flow at the surface and you cannot switch the feeding gas from CCR to SCR during the dive without changing the flow rate.
How does it works is absolutely clear, it has a first stage that increase the IP with the depth that feed a needle valve, so the flow increae with the IP (and the depth).