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

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    RBW Member marc_d is an unknown quantity at this point marc_d's Avatar
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    300 Bar 7's on your Unit - Good Idea or Not ??

    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

  2. #2
    RBW Member Paul T will become famous soon enough Paul T will become famous soon enough Paul T will become famous soon enough Paul T will become famous soon enough Paul T's Avatar
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    Re: 300 Bar 7's on your Unit - Good Idea or Not ??

    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

  3. #3
    RBW Member osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris's Avatar
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    Re: 300 Bar 7's on your Unit - Good Idea or Not ??

    Quote Originally Posted by marc_d  View Original Post
    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.

  4. #4
    RBW Member Diving Pete is on a distinguished road Diving Pete is on a distinguished road Diving Pete's Avatar
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    Re: 300 Bar 7's on your Unit - Good Idea or Not ??

    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,

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    RBW Member Diving Pete is on a distinguished road Diving Pete is on a distinguished road Diving Pete's Avatar
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    Re: 300 Bar 7's on your Unit - Good Idea or Not ??

    Quote Originally Posted by marc_d  View Original Post
    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....

  6. #6
    RBW Member Paul T will become famous soon enough Paul T will become famous soon enough Paul T will become famous soon enough Paul T will become famous soon enough Paul T's Avatar
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    Re: 300 Bar 7's on your Unit - Good Idea or Not ??

    Quote Originally Posted by Diving Pete  View Original Post
    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

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    RBW Member Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1's Avatar
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    ybod

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

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

  8. #8
    RBW Member osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris is a splendid one to behold osiris's Avatar
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    Re: 300 Bar 7's on your Unit - Good Idea or Not ??

    Quote Originally Posted by Gobfish1  View Original Post
    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.....

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    RBW Member Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1 has a reputation beyond repute Gobfish1's Avatar
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    ybod

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

    Quote Originally Posted by osiris  View Original Post
    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 ,

  10. #10

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

    Quote Originally Posted by Paul T  View Original Post
    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.

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