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**Dave Sutton** · 17th April 2007, 17:33

Quote: (Originally Posted by silent running)

Ben, this is a very good explanation of another great Prism safety feature-all solenoids should fail closed.

Errr.... except that it's no different than any other solenoid... all of the Snaptites work the exact same way. Another "Great Safety Feature" (shared by most rigs)....

. It's not good, bad, or unique. It's just the way solenoids work.

When they corrode all solenoids can fail open.... it's just a mechanical jam. None are better than any others in this regard.

"Aviators 02" is the dry 02 choice... use it and even the cheapest solenoid will last 100 years. The difference between it and medical 02 is the guarantee of dryness (due to stratoshperic temperatures freezing the systems in aviation use). Much medical 02 is the same stuff, but Aviators 02 is *guaranteed* to be dry. Available at any gas supply place. I'm surprised that more divers don't use it: It's not measureably more expensive.

Dave

17th April 2007, 17:33	#15 (permalink)
Dave Sutton Diveshop of Horrors Current Rebreather/s: Sport Kiss MK 15.X rEvo Other CCR Azimuth Home Build Other Rebreather/s: Classic Kiss rEvo Other CCR Azimuth Home Build Join Date: Jun 2006 Location: Narragansett, Rhode Island and Hackettstown, New Jersey Posts: 2,672	Re: What is the lifespan of a solenoid? Quote: (Originally Posted by silent running) Ben, this is a very good explanation of another great Prism safety feature-all solenoids should fail closed. Errr.... except that it's no different than any other solenoid... all of the Snaptites work the exact same way. Another "Great Safety Feature" (shared by most rigs).... . It's not good, bad, or unique. It's just the way solenoids work. When they corrode all solenoids can fail open.... it's just a mechanical jam. None are better than any others in this regard. "Aviators 02" is the dry 02 choice... use it and even the cheapest solenoid will last 100 years. The difference between it and medical 02 is the guarantee of dryness (due to stratoshperic temperatures freezing the systems in aviation use). Much medical 02 is the same stuff, but Aviators 02 is guaranteed to be dry. Available at any gas supply place. I'm surprised that more divers don't use it: It's not measureably more expensive. Dave __________________ "Changes in Lattitudes, Changes in Attitudes, Nothing remains quite the same".... www.nobubblediving.com Last edited by Dave Sutton : 17th April 2007 at 17:42.
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