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They actually work automatically when needed. Only useful to saturation divers
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Zeb
March 13, 2019 12:16PM
When the divers operate for long periods an a high pressure atmosphere that has had the nitrogen replaced with helium, the very small helium molecules can get past the seal and into the watch. When the divers return to atmospheric pressure, the transition is too fast to allow the molecules to work their way out, and this will cause pressure to build up in the watch, and can pop off the crystal. The helium relief valve is triggered by pressure INSIDE the watch to open, venting the pressure. When you're diving, pressure OUTSIDE the watch keeps it closed.

And, yes, nobody uses them except for the few hundred people in the world who are saturation divers.



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Dan "Zeb" Zsebehazy
Dan's Watch Web Site
Subject Author Views Posted
Helium Escape Valves >>> MarkKershaw 50 March 13, 2019 06:48AM
They actually work automatically when needed. Only useful to saturation divers Zeb 35 March 13, 2019 12:16PM
Thanks for the info Thumbs Up (n/t) MarkKershaw 30 March 13, 2019 12:36PM
Don't worry about it, 99.99% of divers will never use it. Smile (n/t) Robmks 34 March 13, 2019 12:10PM
I actually do like the look of He Valves Thumbs Up (n/t) MarkKershaw 31 March 13, 2019 12:37PM



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