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Dive Tanks

Discussion in 'Technical' started by welshwarrior, Sep 23, 2021.

  1. welshwarrior

    welshwarrior Well-Known Member

    Messages:
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    Location:
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    I’ve been offer a couple of dive tanks both are 232 bars one 7l the other 10l how fills will I get into an ultra SE and is it worth it or am I best getting a 300 bar tank.
     
  2. jesim1

    jesim1 Kit bitch to the Stars

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    Walk away - even when cheap they are not the right thing for the job, you will end up getting them tested twice as often if they have scuba valves on them, and you will only get about half the fills compared to a 300bar version, so the costs quickly outweigh any saving using a 232 bar for air guns
     
    Ste.v.a and jimbobjones like this.
  3. jimbobjones

    jimbobjones Posting Addict

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    I think I am Stalking @jesim1 today, he's right please take heed and save your money.
     
    jesim1 and Ste.v.a like this.
  4. the logun-ator

    the logun-ator "can i,? wey aye man!"

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    Location:
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    I use both 232 and 300 bar bottles.
    The 232 gets used for rm8/ultra testing etc as well as bulk filling on my other guns. If they need more then I use the 300 bar one.(i go through a canny bit of air per week)
    Mind you I have a dive compressor so squashing air isn't an issue :)
    Saw 4x out of test 232 bottles sell on the bay a bit back for 99p
     
  5. welshwarrior

    welshwarrior Well-Known Member

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    Thanks guys but they have cost me nothing , so initial out lay is no issue.

    But sound like your advising selling them to a diver and buying a 300 bar air specialist bottle.
     
  6. shadowryder

    shadowryder "whistlin' Dixie"

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    if free and got plenty test left on them then use them,you lose nowt..
    but if no test on them you wont be able to get them filled and not worth paying for tests on them.
     
  7. welshwarrior

    welshwarrior Well-Known Member

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    No test but one of the guys who works with us his dive club will pressure test them for £15 each.
     
  8. shadowryder

    shadowryder "whistlin' Dixie"

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    can he get them filled for you??
    If so again you got nothin to lose..
     
  9. workshyfop1972

    workshyfop1972 Engaging Member

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    do the valves differ if they are dive bottles? thought a dive bottle only has a tap but no gauge?
     
  10. welshwarrior

    welshwarrior Well-Known Member

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    The gauge is on the hose/clamp
     
  11. welshwarrior

    welshwarrior Well-Known Member

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    It’s only £4 a tank through work so not a lot.

    My main concern is if they only got me 10 fills a tank in my Ultras whats the real point best staying with the pump or selling them to fund a 300 bar tank.
     
  12. MoggyM

    MoggyM FLM

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    I have a 12l 232bar and use it to start charging then, finish off with my 7l 300bar.

    My 5.5ftlb 10m target rifles only fill to 200bar and rarely get on the 300bar

    I can run the dive bottle right down to 100bar before charging the two bottles at the same time. So OK, if, you have both 232 and 300
     
  13. Igotknobblies

    Igotknobblies Engaging Member

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    Location:
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    What's the max fill pressure in your ultra? If 200 bar, then get the bigger tank, it'll give you a lot more fills. Remember you don't have to fill to its max pressure. Generally if you can get a sub 12 gun to 160 or 170 bar, you'll get plenty of shots meaning you can let your main tank drop to this point before refilling. A bit pointless and expensive if you do it at 200 bar! How many shots do you get from a max pressure fill? If your gun is a 250 bar fill pressure then perhaps go for a 300 bar tank. Beware the carbon fibre ones, they get binned at 20 years (I think) no matter how good condition they are in. Steel is heavier yes, but a) hopefully, its not going near salt water and b) if you go to a reputable pump premise, you'll be given good dry air, so unlikely to rust internally.
     
  14. welshwarrior

    welshwarrior Well-Known Member

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    thank I’ve got both tanks FOC so that’s great I fill to about 180-190 with the pump and get around 40 shots. So seems workable.
     
  15. metalman

    metalman Big Poster

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    There is also a visual test 2 1/2 years after a pressure test, or used to be in the old days
     
  16. welshwarrior

    welshwarrior Well-Known Member

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    Is that not the same with all high pressure air tanks?

    I come from a diving background and this is totally normal. The visual inspection are not expensive.
     
  17. ratman60

    ratman60 Pro Poster

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    Hello, my first cylinder was a 12 ltr 232 bar and I got a lot of fills with a AA S410 @180, with an ultra you should get around 40 on the 7 and 60 on the 10
     
    Last edited: Sep 25, 2021
  18. welshwarrior

    welshwarrior Well-Known Member

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    That’s perfect thank you.
     
  19. Ian Carmichael

    Ian Carmichael GeordieBorn

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    Location:
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    No. Diving cylinders are visual tested every 2 1/2 years and pressure tested every 5 years. None diving cylinders are visual and pressure tested every 5 years.
     
  20. birkin

    birkin Well-Known Member

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    I wouldn't bother with a 232 bar tank.
    If my experience is anything to go by when I get my tanks filled to 300 bar they have dropped to 250 bar by the time I get them home.
     

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