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Advice King Ratcatcher - co2 to Air conversion

Discussion in 'Anything Airgun Related' started by masbrown, May 10, 2015.

  1. masbrown

    masbrown Newbie

    Messages:
    4
    Likes Received:
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    Location:
    Shepshed, Loughborough
    Need some advice :

    I have just decided to take the plunge and am now switching my King Ratcatcher from co2 to air!


    I've just purchased the following:

    http://www.rap4uk.com/Guerrilla-Air-.../ms805-1pi.htm
    http://www.rap4uk.com/88g-BB-Gun-Air...ter-p/8785.htm

    The bottle was filled yesterday although the shop didn't really want to know about fitting it to the King Ratcatcher, and just said "do it at your own risk" !!

    Before I fit the adapter and screw in the filled bottle, is there anything I should be aware of, any issues or risks?!?! The air rifle is completely standard. The bottle is regulated to the recommended 800psi.

    Thanks for your help guys!
    Cheers, Mark
     
  2. cloverleaf

    cloverleaf Super Moderator Staff Member Mod/Admin

    Messages:
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    Location:
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    Welcome to the forum :)

    Seems like you've got all bases covered, but yeah - undertake at your own risk!

    Tbh as long as measures are in place to prevent over-pressurisation in the event of a reg failure (burst discs) I don't see a problem. Will be interested to hear how it turns out :)
     
  3. masbrown

    masbrown Newbie

    Messages:
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    Location:
    Shepshed, Loughborough
    Thanks Cloverleaf!

    What measures would you advise? I am really new to this modding game, and just want to tread carefully.
    Would appreciate anyone on here who has already done this?
     
  4. cloverleaf

    cloverleaf Super Moderator Staff Member Mod/Admin

    Messages:
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    Location:
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    No problem :)

    Tbh I'm far from the oracle on this kind of conversion; although I'm all for air over CO2 (better performance, cheaper, more environmentally-friendly and sustainable) if done correctly.

    IMO the most important thing is ensuring that a gun designed to handle 800psi never sees more than this; so a correctly-functioning reg with adequate safety precautions to safeguard against damage if it fails (i.e. the burst disc) is a must. It's possible that seals might want a bit of a re-think as air is "thinner" than CO2 and I think some have reported leaks in the past. I think CO2 guns usually run Polyurethane seals; changing the O-rings to standard 70-shore Nitrile offerings might improve reliability.

    The gun will most likely benefit from a good setting-up (different transfer port sizes and striker impact) to get the best from it; although tbh this is a subject on its own that one could write a book on.

    Good luck getting it sorted - would be interested to see some pics when finished :)
     
  5. masbrown

    masbrown Newbie

    Messages:
    4
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    Location:
    Shepshed, Loughborough
    Thanks Coverleaf, was thinking seals might be a worthwhile consideration.
    just want to be 100% sure for when I connect everything for the 1st time.

    Cheers!
     
  6. laserman

    laserman Well-Known Member

    Messages:
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    Likes Received:
    0
    Location:
    wolverley
    Hi mate welcome. Is it the king ratcatcher? A HPA conversation is a good way when done properly. But there's always the chance it can take your face off. All I'm saying is be careful. Good luck
     
  7. oling

    oling Well-Known Member

    Messages:
    94
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    Location:
    Harpenden
    Nope you're 100% safe to connect everything up. Those paintball tanks have burst discs which mean that if there were a problem they would just vent the air anyway. If you're outputting much more than 800psi (such as with the variable output pressure equivalent of the guerrilla air cylinder) then it can be quite difficult to remove if not empty but you should be fine to connect and disconnect the bottle mid fill so carry on!
     
  8. masbrown

    masbrown Newbie

    Messages:
    4
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    Location:
    Shepshed, Loughborough
    Hi laserman - that's what I was concerned about!! My face blowing off :-(

    oling - that's what I needed to hear... Seems like it's quite a safe procedure then!!
     

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