Helium escape valve?

[andrema]

What is the function of the helium escape valve used for?


The helium escape valve was specially developed for use by professional divers. During deep-sea dives lasting several days, divers operate from diving bells. Prior to surfacing, these bells are filled with a mixture of helium and oxygen. The helium molecules are lighter than air and can therefore penetrate the watch in sufficient quantity to push out the crystal at atmospheric pressure levels. This can be avoided by opening the valve during resurfacing, which allows the helium to escape but prevents water from entering the watch.

[DMB]

NOTE* it's done in a dry environment.

[docrwm]

NOTE* it's done in a dry environment.

Isn't it done in a capsule environment - or at least isn't that what it was designed for?

[DMB]

In a dry decompression chamber. I don't know all the correct terminology, but it is NOT done in the water. (Ex Omega manual valve). An auto valve will release on it's own, but that won't happen until decompression, which is in a dry environment.

[docrwm]

In a dry decompression chamber. I don't know all the correct terminology, but it is NOT done in the water. (Ex Omega manual valve). An auto valve will release on it's own, but that won't happen until decompression, which is in a dry environment.

That's what I thought. Its to prevent the watch from popping the crystal, or worse, during the decompression stay in the chamber by professional divers. Thanks.

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