Octo for cold water

[Bretagus]

I'm looking into buying a regulator (et al) for cold water diving, and was wondering how important a heat exchanger on the second stage is for the octo, provided the first stage was sealed and the second stage is a diaphram. This is just for recreational diving, so if I needed to use it, it would be for 10 minutes at the most... is that enough time to cause a freeflow in cold enough water?

LDS sells Zeagle... I was thinking the ZX-DSV with an Envoy octo unless I need a heat exchanger.

 

[scubatoys]

"provided the first stage was sealed and the second stage is a diaphram. "

All second stages have a diaphragm. It's the first stages that can be a piston or a diaphragm, then you can seal the piston 1st stage. Diaphragm 1st stages are kinda sealed by design to begin with, but then you can seal the seal... It's kind like a 2 bagger...

But in answer to your question, you could just use the envoy octo, as it would not be too likely to freeze, but it would only be about 25 bucks more to add something with the vanes... So do you want to have $400 in the system, and perhaps worry about it?? Or $425 and know that it's all rated for cold. For that small difference, I'd probably add the adjustability and freeze vanes of a ZX octo, or if you wanted something smaller, you could also do the proton ice octo from mares at the same price.