300 Bar 7's on your Unit - Good Idea or Not ??

[marc_d]

Hi,

Could you please share your experience with me on this situation.

What would be the problem(s) with having the rebreather with a Kent Tooling frame and attaching 2 x 7L 300 bar cylinders ?

Ignore issues like...

carrying it I'm a strong lad.

Fully understand you won't pump 300 bar of 02

And at deeper depth you need different mix, this is say for sub 30-40m

Assuming you have one with air or another breathable gas and one with O2, then attach a second stage to each cylinder for bail out options.

You would then have plenty of gas, additional weight in the bottles off the belt but still some dumpable and you could bail out onto the air 7L at depth and deco off the 02 7L at 3m directly off the regulators if needed.

I can see a flaw in that everything is dependent on both first stages and should one or both fail then you don't have a separate to fail back but like wise you don't have all the fail points of carrying the stage bottle.

Can you please point out any other issues.

Thank you.

Marc D
marc@croydonbsac.com

[Paul T]

This has been discussed at length before

Last time it was in connection with the set up of the jj

Do a search......lots was talked about

Just to add, i have 2x 6ltr steel on the kiss, but have Dil/bailout and 50% for bailout/deco (not 100%)
o2 is from additional small cyl.

Steel cyl form part of weight system, so need less lead. Allys would require extra lead and are heavier to start with

Good system for rib diving with little deco etc

Paul

[osiris]

Hi,

Could you please share your experience with me on this situation.

What would be the problem(s) with having the rebreather with a Kent Tooling frame and attaching 2 x 7L 300 bar cylinders ?

Ignore issues like...

carrying it I'm a strong lad.

Fully understand you won't pump 300 bar of 02

And at deeper depth you need different mix, this is say for sub 30-40m

Assuming you have one with air or another breathable gas and one with O2, then attach a second stage to each cylinder for bail out options.

You would then have plenty of gas, additional weight in the bottles off the belt but still some dumpable and you could bail out onto the air 7L at depth and deco off the 02 7L at 3m directly off the regulators if needed.

I can see a flaw in that everything is dependent on both first stages and should one or both fail then you don't have a separate to fail back but like wise you don't have all the fail points of carrying the stage bottle.

Can you please point out any other issues.

Thank you.

Marc D
marc@croydonbsac.com

Damn good idea in my view.

[Diving Pete]

Not...

Partly for the fact of multiple single point of failures..

What are you trying to achieve ?

Less weight carried?

If so then another solution is use 2 x 2 litres for your Dil & o2, & carry a stage (of whatever volume you require for the dive),
you can pass it off.
It doesn't require your unit to be working,
it will equal less weight in total.
You will always have decent fills of both 02 & Dil,

[Diving Pete]

I can see a flaw in that everything is dependent on both first stages and should one or both fail then you don't have a separate to fail back but like wise you don't have all the fail points of carrying the stage bottle.

Can you please point out any other issues.

Thank you.
Marc D

Its not just the first stages - Cylinder neck O'rings, low pressure hoses to manifold, 2nd stage regulators are all capable of putting you in a world of hurt....

[Paul T]

Its not just the first stages - Cylinder neck O'rings, low pressure hoses to manifold, 2nd stage regulators are all capable of putting you in a world of hurt....

Think there's a bit of O/C mentality coming across here

The unit will still function with no means of dil addition, the diver can stay on the loop........just ascend and end the dive

If the O2 fails, then he can bail onto the 7ltr dil or run semiclosed

Paul

[Gobfish1]

300 bar 7s to big for the noddy dives and to small for the big boys days out ,,

[osiris]

300 bar 7s to big for the noddy dives and to small for the big boys days out ,,

Perfect for a noddy dive to 30M though Then for the big boys dives he could change to twin 18's.....

[Gobfish1]

Perfect for a noddy dive to 30M though Then for the big boys dives he could change to twin 18's.....

lol i hear 4 9L cylinders are all the go ,, 18s are old news ,

[Capone]

Think there's a bit of O/C mentality coming across here

The unit will still function with no means of dil addition, the diver can stay on the loop........just ascend and end the dive

If the O2 fails, then he can bail onto the 7ltr dil or run semiclosed

Paul

I think its a good idea.