some facts about helium release valves

Published: 11-04-24

In 1967, the helium release valve was patented by Rolex, having been for professional use in saturation diving on watches which are suited for use at depths exceeding 300m. The high pressure causes helium molecules to enter the watch case; the molecules are smaller than oxygen and nitrogen and simply penetrate through the case seals. During decompression, the molecules are unable to escape quickly enough, causing crystal to pop out as a result of excess internal pressure. Hence the automatic release valve, which is a simple spring-loaded one-way valve.