The Laboratory of Enrico: The helium valve

Description :

One of the purposes of this section technique is also to dispel the stereotypes or some “urban legends” due to lack of widespread knowledge.

The Laboratory of Enrico


The topic that will be discussed today is the responsibility of professional divers, as users of a function often abused in words, the helium valve.

We see a growing range of professional divers watches, but it should also be noted which in reality are the features that a professional diver’s watch should have.

Here is the list:

  • Light spot on the dial;
  • Luminous hands;
  • Unidirectional rotating bezel;
  • Water resistance equal to or greater than 30 atmospheres (30 bars or 300 m.)
  • Screw-down crown
  • Valve helium.

As we can easily notice is to be surprised, if we consider that the list is missing the screw back, not considered essential thanks to the new generation of silicone gaskets or O-ring, and especially by the fact that its surface can be easily compressed by the water pressure against the rest of the case.

Regarding instead the helium valve, one should look carefully.

Who knows how it works, raise your hand.

I am convinced that few of those who are not professional divers know how to answer this question.

For the sake of truth, I must say that those who are not really professional, this valve does not need to own anything.

The reason is that its use is limited to the needs that arise when you are inside a pressurized bell to fall in the deep sea.

The atmosphere created inside the bell is inevitably enriched with helium.

We all know that helium gas is very volatile and its molecules, already tiny, under the effect of pressure further reduces their size, could then penetrate inside the watch through the crown (albeit cleverly secured).

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