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Oxygen free nitrogen ?

Discussion in 'Anything Airgun Related' started by Alex.B, Jan 13, 2014.

  1. Alex.B

    Alex.B Keyboard Hero

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    Hi guys is there any reason I can't run my PCP on o.f.n ? Would it work ? They use it for filling car tyres so I was wondering if it would work.

    Any thoughts :confused:

    Alex
     
    Last edited: Jan 13, 2014
  2. secretagentmole

    secretagentmole Low down, dirty and quiet...

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    No reason why it won't work, just more expensive than air isn't it?
     
  3. Alex.B

    Alex.B Keyboard Hero

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    My brother uses at work and (not sure of bottle size but its up to my shoulder ) but it gets replaced for 14 + vat.
     
  4. secretagentmole

    secretagentmole Low down, dirty and quiet...

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    Normal air is around 80% nitrogen and it is inert!
     
  5. Alex.B

    Alex.B Keyboard Hero

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    You got me there I bunked off school for chemistry :D
     
  6. loki_79

    loki_79 Donator

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    It won't cause your gun any harm at all, in fact will eliminate any risk of corrosion. BUT be aware that quickly emptying a cylinder into a confined space (bedroom, car, etc) could displace sufficient oxygen from the air to cause asphyxiation. You can do the volume calculations depending on the space, but I would not sleep with it in my bedroom just in case of a leak!
     
  7. Alex.B

    Alex.B Keyboard Hero

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    Right I get it , thanks for the replies :up: I'm going to run my ultra down a bit and try it out using the bottle at the workshop for free:D .

    I will update as things go .

    If I want my own bottle the deposit will be 40 quid plus 12 per recharge/replace

    Can I use my whip or whatever you call it off my hand pump for the trial ?
     
  8. spike589715

    spike589715 Busy Member

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    What pressure is the nitrogen at ?
    cheers
    simon
     
  9. Clubshot

    Clubshot Clubshot

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    Sure there are posts around where Shooters have tried other Air compounds in precharge Air Guns

    Made for Air - Diving Air Keep to it - As All precharge Guns was Design and made for Dive Air

    Remember hot suny Day's of Air Bottle being on Table top and getting hot - blowing seals out of precharge rifles
    As Heat had raised the preasure -

    BOB/R
     
  10. 1961nuffield

    1961nuffield Honorary Member

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    Nitrogen (for tyres) will be fine, just avoid unknown gasses or anything containing a lot of oxygen.

    John
     
  11. spike589715

    spike589715 Busy Member

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    why would this be worse for a gun filled with Nitrogen ... .? Pressure will increase with any gas when heated ? Diving air is only air filtered (breathing air filter set) and compressed ..... Though looking at a gun shop compressor recently I would not breath the air out of their compressor !



    cheers simon
     
  12. Robin

    Robin Engaging Member

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    I have pure nitrogen in 500bar cylinders at work, used on the lasers, but don't think its work the risk of damage to the gun, will stick to getting it filled at the local dive shop
     
  13. Alex.B

    Alex.B Keyboard Hero

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  14. Shropshire Shooter

    Shropshire Shooter Well-Known Member

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    "Air" is around 80% nitrogen and 21% oxygen - all other gasses account for about 1%. I'd still stick with dry air (and it doesn't matter whether it comes from a pump or a scuba tank).
     
  15. JD

    JD Donator

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    Isn't this what Theoben used to fill their gas rams ?
     
  16. r10hunter

    r10hunter Honorary Member

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    Somthing you may want to research is, if you use a propellant other than air or co2 you may need fac even if sub 12.
    Pre 1997 air was the only propellant allowed for lethal barrelled air weapons held off of fac, ie guns that were not paintball etc. Back then you needed fac for any co2 gun regardless of its power.

    Then I think in 1997 they only added co2 to the list of allowed propellants.
    So nitrogen could still require fac ???

    I am not sure about this, but it would be worth your time doing some research.
    Cheers Andy
     
    Last edited: Jan 14, 2014
  17. 1961nuffield

    1961nuffield Honorary Member

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    Probably so, as it would reduce corrosion.

    John
     
  18. secretagentmole

    secretagentmole Low down, dirty and quiet...

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    80+21+1=102

    Man the air must be heavy where you are
     
  19. 18 Wheeler

    18 Wheeler Busy Member

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    Correct IMO.

    Sec.48 of the Firearms (Amendment) Act 1997 applies:

    Any reference to an air rifle, air pistol or air gun—

    (a)in the Firearms Acts 1968 to 1997; or

    (b)in the M1Firearms (Dangerous Air Weapons) Rules 1969 or the M2Firearms (Dangerous Air Weapons) (Scotland) Rules 1969,

    shall include a reference to a rifle, pistol or gun powered by compressed carbon dioxide
    .

    HTH
     
  20. Tmaxxjj

    Tmaxxjj Busy Member

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    Thanks for giving us a bad rep! :p
    We're not all bad at maths, honest :rolleyes:
     

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