Quote: (Originally Posted by
kmev)
...so I tried everything, including settling the sorb on top of a vibrating compressor, but nothing prevented the channeling on long dives.
This is a big no no. This rigorous vibration can break down the shape and size of the grannules. This shape and size is important to the way the grannules allow gas to pass in and around them. This was specifically discussed in my MOD1 class.
Quote: (Originally Posted by
kmev)
On taking a closer look at the canister, I discovered several radial cracks emanating from the brass button on the “wagon wheel”. These cracks were causing the lid to hang up on the scrubber wall and allowing the settling of the sorb during long dives. I had ISC make a new wagon wheel and I haven’t had any problems since.
Sounds like this was the root of the problem, exaberated by the vibrating compressor.
Quote: (Originally Posted by
kmev)
I had assumed that packing a spring-loaded scrubber was foolproof and channeling was extremely unlikely, but it can happen.
I'd venture to say that you may not have been packing it properly based on the above statements.