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- Helium_release_valve abstract "A helium release valve, or helium escape valve, as it is also called, is a feature found on some diving watches. It provides functionality for professional divers operating at great depths for prolonged periods of time or under saturation.When commercial divers operate at great depths, they often spend prolonged hours in diving bells under pressure breathing a breathing gas mix like trimix or similar, that contain the gases helium or hydrogen. Since helium atoms are the smallest natural gas particles found in nature, these gas atoms are able to work their way inside the watch, around any o-rings or other seals the watch may feature. This is not a problem as long as the divers stay under pressure, but when the decompression stops during resurfacing aren't long enough, a pressure difference builds up between the trapped gas(es) inside the watch case and its environment. Depending on the construction of the watch case and crystal, this effect can cause damage to the watch, such as the crystal popping off.While many watch companies react to this effect by simply offering an even more robust case/crystal construction, Rolex and Doxa S.A. however thought of a different concept when they co-created the helium escape valve in the 1960s (first introduced in the Rolex Submariner/Sea-Dweller and the Doxa Conquistador): A small, spring-loaded one-way valve integrated in the watch case that is activated when the differential between the inner and the outside pressure reaches a critical level. Result: The valve releases the helium, hydrogen and/or other gases used in the breathing gas mix trapped inside the watch case.Automatic helium release valves usually don't need any manual operation. There are however helium release valves featuring an additional screw-down crown at the side of the watch. When the diver starts to ascend, the diver simply unscrews the valve's crown to the full open position, allowing any breathing gas that may have been trapped inside the watch to escape during decompression.Helium release valves can primarily be found on mechanical diving watches featuring a water/pressure resistance greater than 300 m (1000 ft) and therefore positioned as more extreme dive watches. Models that feature a helium release valve include most of the Omega Seamaster series, Rolex Sea Dweller, some dive watches from the Citizen Watch Co., Ltd, Breitling, Girard-Perregaux, Panerai, Mühle Rasmus by Nautische Instrumente Mühle Glashütte, all watches produced by Enzo Mechana, Aegir Watches and selected Doxa, selected Victorinox models, Oris models and TAG Heuer Aquaracer models, as well as the DEL MAR Professional Dive 1000 watch. Other watch manufacturers such as Seiko still offer high-level dive watches that are guaranteed safe against the effects of helium gas without needing an additional opening in the case in form of a release valve. The most extreme mechanical diving watch equipped with a helium relief valve is the 20,000 foot by CX Swiss Military Watch, the current world record holder for mechanical diving watches and featured in the Guinness Book of World Records.".
- Helium_release_valve wikiPageID "8933729".
- Helium_release_valve wikiPageLength "4131".
- Helium_release_valve wikiPageOutDegree "39".
- Helium_release_valve wikiPageRevisionID "706210819".
- Helium_release_valve wikiPageWikiLink Aegir_Watches.
- Helium_release_valve wikiPageWikiLink Atom.
- Helium_release_valve wikiPageWikiLink Breathing_gas.
- Helium_release_valve wikiPageWikiLink Breitling_SA.
- Helium_release_valve wikiPageWikiLink Category:Diving_equipment.
- Helium_release_valve wikiPageWikiLink Check_valve.
- Helium_release_valve wikiPageWikiLink Citizen_Holdings.
- Helium_release_valve wikiPageWikiLink Covalent_radius.
- Helium_release_valve wikiPageWikiLink DEL_MAR.
- Helium_release_valve wikiPageWikiLink Decompression_practice.
- Helium_release_valve wikiPageWikiLink Diving_bell.
- Helium_release_valve wikiPageWikiLink Diving_watch.
- Helium_release_valve wikiPageWikiLink Doxa_S.A..
- Helium_release_valve wikiPageWikiLink Enzo_Mechana.
- Helium_release_valve wikiPageWikiLink Girard-Perregaux.
- Helium_release_valve wikiPageWikiLink Helium.
- Helium_release_valve wikiPageWikiLink Hydrogen.
- Helium_release_valve wikiPageWikiLink Nautische_Instrumente_Mühle_Glashütte.
- Helium_release_valve wikiPageWikiLink O-ring.
- Helium_release_valve wikiPageWikiLink Omega_SA.
- Helium_release_valve wikiPageWikiLink Omega_Seamaster.
- Helium_release_valve wikiPageWikiLink Oris_(company).
- Helium_release_valve wikiPageWikiLink Panerai.
- Helium_release_valve wikiPageWikiLink Pressure.
- Helium_release_valve wikiPageWikiLink Professional_diving.
- Helium_release_valve wikiPageWikiLink Rolex.
- Helium_release_valve wikiPageWikiLink Rolex_Sea_Dweller.
- Helium_release_valve wikiPageWikiLink Saturation_diving.
- Helium_release_valve wikiPageWikiLink Screw-down_crown.
- Helium_release_valve wikiPageWikiLink Seiko.
- Helium_release_valve wikiPageWikiLink TAG_Heuer.
- Helium_release_valve wikiPageWikiLink Trimix_(breathing_gas).
- Helium_release_valve wikiPageWikiLink Victorinox.
- Helium_release_valve wikiPageWikiLink Watch.
- Helium_release_valve wikiPageWikiLinkText "Helium release valve".
- Helium_release_valve wikiPageWikiLinkText "helium release valve".
- Helium_release_valve wikiPageWikiLinkText "release or escape valve".
- Helium_release_valve wikiPageUsesTemplate Template:Unreferenced.
- Helium_release_valve subject Category:Diving_equipment.
- Helium_release_valve hypernym Feature.
- Helium_release_valve type Work.
- Helium_release_valve comment "A helium release valve, or helium escape valve, as it is also called, is a feature found on some diving watches. It provides functionality for professional divers operating at great depths for prolonged periods of time or under saturation.When commercial divers operate at great depths, they often spend prolonged hours in diving bells under pressure breathing a breathing gas mix like trimix or similar, that contain the gases helium or hydrogen.".
- Helium_release_valve label "Helium release valve".
- Helium_release_valve sameAs Q5706230.
- Helium_release_valve sameAs Soupape_à_hélium.
- Helium_release_valve sameAs m.027q85h.
- Helium_release_valve sameAs Q5706230.
- Helium_release_valve wasDerivedFrom Helium_release_valve?oldid=706210819.
- Helium_release_valve isPrimaryTopicOf Helium_release_valve.