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In fact a german shop ( the guys who made a widely used reg test machine) made a lens which allowed filming the icing process in the reg during operation. Stunning pics. Matthias "Dr.Jeffrey Mark" schrieb: > > It has more to do with the moisturein the fill air and the maintenance > of the regs I think > > Kent Lind wrote: > > > > Wendell: > > > > Obviously saltwater freezes at a lower temperature than fresh water. That's > > why the put salt on the roads. > > > > There's a place in Juneau where the highway runs on a narrow roadbed with a > > lake on one side and the ocean channel on the other side. Most of the > > winter the lake is frozen solid while the channel is open water and free of > > ice. > > > > In addition to that, when seawater does freeze, it is a more slushy and > > crumbly ice, not the sharp hard glassy stuff you get with freshwater. > > > > The question though, is what causes a regulator to freeze? Is it the > > seawater that washes into the balance chamber of the regulator that freezes > > and causes failure? Or is it moisture in your breathing gas that condenses > > and freezes to cause failure? > > > > I suppose that either could cause a reg to fail. I've never torn apart a > > frozen reg to see what went wrong. However I suspect that ice forming > > inside the air pathways of the regulator from moist air is the more common > > failure. In which case the medium you're diving in would not be a factor. > > > > On the other hand, you guys in the Great Lakes sure seem to have a lot more > > problem with freezing than we do here in Alaska. I used to dive MK20s all > > winter in mid-30s degree water and never have any failures. And I know > > people who sport dive for king crab in the winter with all kinds of old clap > > trap gear without problem. Horrifying stuff like old Dacor regs. I > > recently switched to Apeks DS4 firsts because they were cheaper and more > > reliable and I've never had one of those fail either. But I hear about you > > guys in the Great Lakes having regs fail all the time. So maybe regs do > > freeze faster in freshwater. > > > > Kent Lind > > Juneau, Alaska > > > > > -----Original Message----- > > > From: Wendell Grogan [mailto:wgrogan@dc*.ne*] > > > Sent: Monday, April 23, 2001 6:04 PM > > > To: techdiver@aquanaut.com > > > Subject: reg freezes > > > > > > > > > OK, new subject. We are starting the exploration of a 160-180 ft deep > > > reservoir that may or may not have remnants of a town at depth. > > > The question that came to mind when my thermometer was reading 36F was > > > if there was a big difference in the tendency for a reg to freeze in > > > salt versus fresh. I think there is an obvious answer to this, but > > > honestly, I was hoping someone could tell me without my having to figure > > > this out on my own. > > > Thanks. > > > Wendell G > > > -- > > > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > > > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > > > > > > > -- > > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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