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Viton/high temp Orings

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  • #1

    Viton/high temp Orings

    Hi folks,

    Just putting out there to see if anyone has found a cheaper source of viton or high temp orings for exhausts. Over paying through the nose at the local bearing shop so hoping there were some other alternative sources SOR.

    Cheers
    Tags: None
  • #2
    Coventrys used to sell them pretty cheap. Not sure if they still do but may be worth the phone call

    Comment

    • #3
      I bought Viton seals for a cbr250rr & vfr400 from a LiteTek.co (http://www.perthstreetbikes.com/foru...-honda-161875/)

      worth a look

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      • #4
        Transeals in Welshpool
        You put the c*nt in country run

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        • #5
          Transeals +1

          But Viton is expense. Hideously, arserapingly so. Often 10x the price of the equivalent Buna-N or nitrile piece.
          "Once upon a time we would obey in public, but in private we would be cynical; today, we announce cynicism, but in private we obey."

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          • #6
            And can release hydrofluoric acid if burnt.
            Commander Keen and Shady 7/8 are doing the Kiwi Shitbox rally 2016 as the Dropkick Dropbears- donate here to help us change cancer!


            Originally posted by Martin Luther King Jnr
            One has a moral responsibility to disobey unjust laws.
            . .

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            • #7
              Transeals...

              They are like 10 times more expensive than Nitrile, but when it's in a spot where it will see heat then I'd rather pay $5 for an o-ring and know I'm not pulling the bike apart again in a few months...

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              • #8
                Can? Does. In significant quantity. As well as Carbonyl Flouride, a phosgene analog.

                Deadly, deadly stuff. Which is why we use it in oxygen clean breathing equipment.

                - - - Updated - - -

                Worth talking to the guys at Transeals. You've got choices including Bunyl N, Viton A, PTFE, EPDM and a bunch of others and you may find a better match than Viton for the working conditions you have in mind for the seal.
                "Once upon a time we would obey in public, but in private we would be cynical; today, we announce cynicism, but in private we obey."

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                • #9
                  Thanks guys.
                  Captain Starfish I am using the orings in my cagiva exhaust stub connection. The originals are fantastic but rare as hens teeth. Athena have been the next best, arrows were crap.
                  Went to Statewide Bearings and they said viton. I get 3-4 months before I get the 2t splooge pushing past hardened degraded orings.
                  If anyone has other suggestions I would be keen to listen. Guys on the uk cagiva forums just say fill the gaps up full of copper high temp silicone sealant and use stronger springs(was the first item done).

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                  • #10
                    I'm running Viton on my RGV. I'm aware of the hydroflouric acid issue. I suspect it won't be a problem as these seals aren't actually exposed to flame, but I'm planning on wearing gloves next time I go near mine.

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                    • #11
                      Any reason (I haven't seen the setup) you couldn't hard mount them with copper crush washers? Permatex Copper HT RTV sounds like a bloody good solution too!
                      "Once upon a time we would obey in public, but in private we would be cynical; today, we announce cynicism, but in private we obey."

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                      • #12
                        O-Ring Material Guide

                        O-Ring Fluid Compatibility Guide
                        They hung a sign up in our town "If you live it up, you won't live it down"-Tom Waits

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                        • #13
                          Captain the design from cagiva is poor to say the least. 2 orings seal between the stub pipe and the exhaust. One against the end of the stub and the other between the stub shaft outer diameter and exhaust outer pipe wall. Good old springs really are all that provide any real sealing capability by compressing the first oring.

                          Has anyone tried Chemraz® / Kalrez® / Simriz® (Perfluoroelastomer) orings in a similar high temp situation?

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