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Thread: CP2 Barrel o rings.

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  1. 05-01-2018, 04:44 PM #1
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    Retracted_Yeti
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    CP2 Barrel o rings.

    As title folks, what are they made from?

    Viton, Neoprene??

    I know the size, just need the type.

    Cheers.

    Roy.
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  2. 05-01-2018, 10:36 PM #2
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    Anyone?
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  3. 09-01-2018, 01:28 AM #3
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    Never mind.

    Should have known not to expect an answer on here!

    This site really has gone downhill.
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  4. 09-01-2018, 08:15 AM #4
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    Quote Originally Posted by Retracted_Yeti View Post
    Never mind.

    Should have known not to expect an answer on here!

    This site really has gone downhill.
    Indeed it has Roy.

    I don't own a CP2 but if you know the size then (from my experience of other barrel seals) viton 70 should do the trick, if the o ring has a softer feel then NBR might be better. What size is it mate as i have thousands of o rings and might just have a a few i could send. What colour are the o rings you have now?
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  5. 09-01-2018, 12:32 PM #5
    Hartcliffer
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    I always used Nitrile/EPDM seals in my QB78, as they aren't affected affected by the CO2; cheap seals will shrink as the CO2 passes it.
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  6. 09-01-2018, 03:31 PM #6
    abellringer
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    It seems Polyurethane [PU]; EPDM; or Viton [FKM] are the most suitable in order of recommendation from O ring suppliers, Nitrile also seems to crop up but I was told it swells with contact to Co2 especially when opened to atmosphere. Hope this helps
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  7. 09-01-2018, 05:32 PM #7
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    Quote Originally Posted by ChrisC View Post
    Indeed it has Roy.

    I don't own a CP2 but if you know the size then (from my experience of other barrel seals) viton 70 should do the trick, if the o ring has a softer feel then NBR might be better. What size is it mate as i have thousands of o rings and might just have a a few i could send. What colour are the o rings you have now?
    Nice one Chris, the seals that came with the CP2 are almost a clear colour and 8mm i.d. by 0.8mm thick.

    Thanks for the replies folks...

    Cheers.

    Roy.
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  8. 10-01-2018, 07:24 AM #8
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    Quote Originally Posted by Retracted_Yeti View Post
    Nice one Chris, the seals that came with the CP2 are almost a clear colour and 8mm i.d. by 0.8mm thick.

    Thanks for the replies folks...

    Cheers.

    Roy.
    I'll take a look Roy but pretty sure i don't actually have that size. The 0.8 thickness is a bit odd. I found 8 x 1 in Nitrile (Sh70)
    https://www.polymax.co.uk/o-rings/rubber-nbr-oring/

    I did find these though
    https://www.polymax.co.uk/o-ring-7-9...nitrile-70-sha
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