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At 12:10 PM 10/2/2000 -0700, Jarrod Jablonski wrote: Hi Matej, Also, the o-ring is designed to extrude rather than blow up the canister if the battery gasses inside the sealed canister. It will now allow water in, but *will* allow gas over-pressure out. >The pressure will not hurt the o-ring over any reasonable period. Obviously >part of general care is to replace them periodically but this is more from >wear than from pressure. The sideways o-ring is a complete waste of time >and actually just gets in the way. To demonstrate the useless nature of >this 0-ring merely remove the face seal o-ring and go diving. The problem >is that it will occasionally catch on the cannister and cause the light to >leak. > >Best, >JJ > > At 08:51 AM 10/2/2000 +0200, you wrote: >With some friends we have been watching the Main O-ring on EE canister >lights. The latches are used only to seal the light on the surface, later >on the water pressure takes over... But this can mean 500 kg force on 100 m >depth. Is that good for the O-ring. Why is the seat (recess) for O-ring >made that way to protect the O-ring from these excessive forces? Sure if >the O-ring is pressed by 50 kg it would seal enough, so there is no need >for the O-ring to be loaded by 500... >Would another O-ring that would seal sideways not only one frontal do any >good (if the first one leaks)? Why not. >I am sure there is a reason behind it all and obviously it works great, I >would just like to understand the reasoning behind it. I think it is not >only cost related.... -Mike Rodriguez <mikey@mi*.ne*> http://www.mikey.net/aue Pn(x) = (1/(2^n)n!)[d/dx]^n(x^2 - 1)^n -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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