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The equipment must supply breathing gas for all users for at least 15 minutes at a cabin altitude of 8,000 ft at a respiratory minute volume of 30 liters per minute, either by continuous flow or via a demand system, and must not cause a significant increase in oxygen content of the local environment. [25]
Most commercial aircraft that operate at high flight altitudes are pressurized at a maximum cabin altitude of approximately 8,000 feet. On most pressurized aircraft, if cabin pressurization is lost when the aircraft is flying at an altitude above 4,267 m (14,000 feet), compartments containing the oxygen masks will open automatically, either above or in front of the passenger and crew seats ...
Smoke hoods present on aircraft, also called protective breathing equipment (or PBEs), typically generate oxygen for anywhere from 30 seconds to 15 minutes. The oxygen is kept in a closed circuit, usually thanks to a tight neck seal. A scrubber system may be present to reduce the levels of carbon dioxide, and is breathable for around 20 minutes ...
Pages in category "Breathing apparatus components" The following 15 pages are in this category, out of 15 total. This list may not reflect recent changes. B.
Breathing oxygen is delivered from the storage tank to users by use of the following methods: oxygen mask, nasal cannula, full face diving mask, diving helmet, demand valve, oxygen rebreather, built in breathing system (BIBS), oxygen tent, and hyperbaric oxygen chamber. Contrary to popular belief most scuba divers do not carry oxygen tanks.
The concept can also be extended to submarines, crewed submersibles and atmospheric diving suits, where the breathing gas requires treatment to remain respirable, and the occupants are isolated from the outside ambient pressure and temperature. Medical life-support systems include heart-lung machines, medical ventilators and dialysis equipment.
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A breathing apparatus or breathing set is equipment which allows a person to breathe in a hostile environment where breathing would otherwise be impossible, difficult, harmful, or hazardous, or assists a person to breathe.
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