Rebreather World - View Single Post - O2 for suit inflation on deep Rebreather cave dives

iain-hsm · 8th October 2006, 16:07

Quote: (Originally Posted by Barrie Law)

I have often dived using O2 to drive my DS although not in caves.

The Molecular size of Oxygen makes it an ideal candidate for suit inflation and due to it's large size (relatively) it has good insulation properties.

The Oxygen supply cylinder used for suit inflation would be an 'off-board' fitted with a low pressure whip that would also fit the manual inject button on my CCR if the need arises.

Like DRMike if there is a proven instance of diver injury due to using O2 in the DS I would like to hear about it, none exist outside of the 'pub rumour' to my knowledge.

Risk assessment and dive planning aside using O2 in your DS is probably something you do not need to be worrying about during your dive but I would not castigate those who do choose to use it accept maybe the smokers amongst us. Regards

It would be interesting to know just how many dives you have on pure 02 suit inflation and to what depth…..and why? When Air or Nitrogen for that matter is just as “good” in molecular size.

When we test materials in oxygen under pressure to see the reaction we do the same test 20 times before increasing either the pressure or temperature or both. 1 fire in 20 tests is interesting, 3 fires in 20 and were thinking, 13 fires in 20 test time to choose another material but I never considered the luck of the Irish. How many dives was that again Barry? lol

Static discharge is the biggest risk IMHO. Remember when girls wore those fluffy nylon tops and the hairs on your arms tingled when you got a hand up. At the time I would have thought she was hot! As the video enclosed shows….. I was right.
(Yes, agreed I would have moved the car first too)

8th October 2006, 16:07	#49 (permalink)
iain-hsm RBW Member Current Rebreather/s: MK 15.X Other CCR Other SCR Other Rebreather/s: Other CCR Other SCR Join Date: Mar 2005 Location: Loughborough England uk Posts: 356	Re: O2 for suit inflation on deep Rebreather cave dives Quote: (Originally Posted by Barrie Law) I have often dived using O2 to drive my DS although not in caves. The Molecular size of Oxygen makes it an ideal candidate for suit inflation and due to it's large size (relatively) it has good insulation properties. The Oxygen supply cylinder used for suit inflation would be an 'off-board' fitted with a low pressure whip that would also fit the manual inject button on my CCR if the need arises. Like DRMike if there is a proven instance of diver injury due to using O2 in the DS I would like to hear about it, none exist outside of the 'pub rumour' to my knowledge. Risk assessment and dive planning aside using O2 in your DS is probably something you do not need to be worrying about during your dive but I would not castigate those who do choose to use it accept maybe the smokers amongst us. Regards It would be interesting to know just how many dives you have on pure 02 suit inflation and to what depth…..and why? When Air or Nitrogen for that matter is just as “good” in molecular size. When we test materials in oxygen under pressure to see the reaction we do the same test 20 times before increasing either the pressure or temperature or both. 1 fire in 20 tests is interesting, 3 fires in 20 and were thinking, 13 fires in 20 test time to choose another material but I never considered the luck of the Irish. How many dives was that again Barry? lol Static discharge is the biggest risk IMHO. Remember when girls wore those fluffy nylon tops and the hairs on your arms tingled when you got a hand up. At the time I would have thought she was hot! As the video enclosed shows….. I was right. (Yes, agreed I would have moved the car first too) Last edited by iain-hsm : 30th December 2008 at 21:44.
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