British nurse lost on dive - Red Sea

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Dan

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We're a manufacturer on the boards for the first time to help you guys out on our canisters or canisters in general. We have found this on our early versions some years back, on Rev 3 (the only rev we sell now) we have modified the o-rings and their position so that it is not necessary to close the canister tight.

The problem happens when canisters are closed with the interface between the two halves touching, normal expansion push this already tight interface even tighter to the point its far to difficult to open a life saving device.

I can't say you can do this with any canister, try it empty first to see if it remains watertight. We ask our customers to leave a .5mm to 1mm gap (fingernail) between the two half's, this in no way affects water tight integrity on our design. You still get some resistance on the threads but in general it works quite well.

Lastly, this DandyDon is correct, in our case (maybe others as well)you can lube the o-rings quite generously without any problem.
How about adding a 1mm thick PTFE washer (spacer) between the canister and the lid to prevent from over tightening?
 
OP
DandyDon

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Has there been any updates on the missing diver the OP posted about?
Nothing on the web. She went missing 5½ days ago. I don't know of any drifting diver surviving more than 3 days, so unless she was picked up but unreported or made it land with water, the best we can hope for in time is a recovery.
 

W Design & Engineering

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How about adding a 1mm thick PTFE washer (spacer) between the canister and the lid to prevent from over tightening?
We looked at PTFE or using a thinner o-ring to act as a gap filler, they will add some value but its not appreciable. We actually decided to join ScubaBoard in hopes of furthering the engineering discussions based on user experiences. That said, your spot on with this suggestion, if the only purpose is to set the gap consistently, well then maybe thats reason enough to make it happen.

Were off topic, I guess and at some point we can open up a discussion board for technical matters in this regard. Right now we're still in the ScubaBoard learning mode.
 

Dan

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We looked at PTFE or using a thinner o-ring to act as a gap filler, they will add some value but its not appreciable. We actually decided to join ScubaBoard in hopes of furthering the engineering discussions based on user experiences. That said, your spot on with this suggestion, if the only purpose is to set the gap consistently, well then maybe thats reason enough to make it happen.

Were off topic, I guess and at some point we can open up a discussion board for technical matters in this regard. Right now we're still in the ScubaBoard learning mode.
I was just thinking out loud. A white strip sandwich between the black lid and black canister would be an easy visual verification of the 1mm stop gap, besides the interference when the lid made contact with the PTFE washer.
 

chillyinCanada

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From Twitter

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W Design & Engineering

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I was just thinking out loud. A white strip sandwich between the black lid and black canister would be an easy visual verification of the 1mm stop gap, besides the interference when the lid made contact with the PTFE washer.
Yes, agreed. I like this idea instead of asking anyone to eyeball it. Noted in the files, thanks
 

Steve A

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That’s why a good experienced guide is necessary. Everyone is just speculating at the moment but we will find out in time.
The straights of tiran have strong currents some guys got washed off a neighbouring reef a couple of months ago but luckily found.
Jackson reef is an amazing dive I’ve been a few times and one of my favourite in the Red Sea
 

Khrissi

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@Steve A definately so . Diving Red Sea last week, morning divers went out with tide going out , strong off shore wind whipping up the surf - came back knackered with the current . My guide told me to wait couple hours whilst tide turned then we had a lovely dive :) K
 
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