Sea-Dweller published in 1967, water depth of 610 meters (2,000 feet), and after 1978 increased to 1,220 meters (4,000 feet), designed for staff and hydrosphere undersea explorer and other deep diving pioneer and set, in covering nearly 70 percent of the Earth's surface waters in the shuttle. And
Rolex Sea-Dweller and divers must also be adapted to the mixed gas, the gas is a high-pressure environment is provided by a light gas such as hydrogen or helium composition for breathing.
When the diver underwater breathing gas reach saturation, they will completely accustomed to deep-sea pressure. To return to the water surface atmospheric pressure will be dozens of hours in the hyperbaric chamber. The deep-sea inhabitants unavoidable process, prompting Rolex at the time for a new generation of rugged dive watch added special function devices - helium valve, so that the gas can be released from the watch, and watch with helium saturation divers like possible security vacuum.
In the decompression phase, helium release in human tissues faster rate than waterproof watch, the results of the pressure accumulated in the internal case. Divers observed during decompression table mirror due to internal pressure, like a champagne stopper from the bottle like a pop. In view of this, the watch is also necessary to effectively drain away excess helium inside the case.
In fact, is not intended to produce anti-helium Rolex watch, but almost impossible to complete a task, that is, a one-way valve assembly side of the case. When the internal pressure of the case beyond a particular level, the device will automatically start, both for the gas released from the case, and without affecting the waterproof watch.
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