Interesting video from Kegland who have had the oxygen transmission of their regular silicon keg lid o-rings tested -
Result is the silicon o-rings does allow oxygen diffusion into the keg.
They do point out that at lower temperatures this diffusion is very much reduced.
My AEB kegs still have the black nitrile rubber o-rings, but my reconditioned ones the silicon ones. In no mad rush to replace as can't recall having any oxygen related off-flavours, but something to be aware of.
Edit - The test paper is available here.
Link seems to be broken so have attached the PDF.
Result is the silicon o-rings does allow oxygen diffusion into the keg.
They do point out that at lower temperatures this diffusion is very much reduced.
My AEB kegs still have the black nitrile rubber o-rings, but my reconditioned ones the silicon ones. In no mad rush to replace as can't recall having any oxygen related off-flavours, but something to be aware of.
Edit - The test paper is available here.
Link seems to be broken so have attached the PDF.
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