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2. Rebreather - Wikipedia

   en.wikipedia.org/wiki/Rebreather

   A rebreather is a breathing apparatus that absorbs the carbon dioxide of a user's exhaled breath to permit the rebreathing (recycling) of the substantially unused oxygen content, and unused inert content when present, of each breath. Oxygen is added to replenish the amount metabolised by the user. This differs from open-circuit breathing ...

3. Schrader valve - Wikipedia

   en.wikipedia.org/wiki/Schrader_valve

   The visible outer thread of the stem holds the dust cap. The Schrader valve (also called American valve[ 1]) is a type of pneumatic tire valve used on virtually every motor vehicle in the world today. The Schrader company, for which it was named, was founded in 1844 by August Schrader. The original Schrader valve design was invented in 1891 ...

4. Mechanism of diving regulators - Wikipedia

   en.wikipedia.org/wiki/Mechanism_of_diving_regulators

   The mechanism of diving regulators is the arrangement of components and function of gas pressure regulators used in the systems which supply breathing gases for underwater diving. Both free-flow and demand regulators use mechanical feedback of the downstream pressure to control the opening of a valve which controls gas flow from the upstream ...

5. Pressure regulator - Wikipedia

   en.wikipedia.org/wiki/Pressure_regulator

   Pressure regulators are used with diving cylinders for Scuba diving. The tank may contain pressures in excess of 3,000 pounds per square inch (210 bar), which could cause a fatal barotrauma injury to a person breathing it directly. A demand controlled regulator provides a flow of breathing gas at the ambient pressure (which varies by depth in ...

6. Diving regulator - Wikipedia

   en.wikipedia.org/wiki/Diving_regulator

   Diving regulator: The most familiar type is the single-hose open circuit scuba regulator, with first and second stages, low pressure inflator hose and submersible pressure gauge. Other names. Demand valve. Uses. Reduces pressurized breathing gas to ambient pressure and delivers it to the diver. Inventor.

7. Trimix (breathing gas) - Wikipedia

   en.wikipedia.org/wiki/Trimix_(breathing_gas)

   Trimix is a breathing gas consisting of oxygen, helium and nitrogen and is used in deep commercial diving, during the deep phase of dives carried out using technical diving techniques, [ 1][ 2] and in advanced recreational diving. [ 3][ 4] The helium is included as a substitute for some of the nitrogen, to reduce the narcotic effect of the ...