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  2. Diving air compressor - Wikipedia

    en.wikipedia.org/wiki/Diving_air_compressor

    A diving air compressor is a breathing air compressor that can ... Common scuba diving cylinder pressures are 200 bar (2940 psi), 3000 psi (207 bar), 232 bar (3400 ...

  3. Diving cylinder - Wikipedia

    en.wikipedia.org/wiki/Diving_cylinder

    Scuba cylinders are technically all high-pressure gas containers, but within the industry in the United States there are three nominal working pressure ratings (WP) in common use; [46] low pressure (2400 to 2640 psi — 165 to 182 bar), standard (3000 psi — 207 bar), and high pressure (3300 to 3500 psi — 227 to 241 bar).

  4. Gas blending for scuba diving - Wikipedia

    en.wikipedia.org/wiki/Gas_blending_for_scuba_diving

    In the case of the Tx 20/40, in a 230 bar cylinder, this would be 230 bar x 40% = 92 bar (or for a 3,000 psi fill, it would require 3,000 x 40% = 1,200 psi of helium). The amount of oxygen is more difficult to calculate, as it is derived from two sources, the added oxygen and the air top-up.

  5. Testing and inspection of diving cylinders - Wikipedia

    en.wikipedia.org/wiki/Testing_and_inspection_of...

    Stamp markings on an American manufacture aluminum 80 cu ft 3000 psi cylinder Stamp markings on a British manufacture aluminium 12.2 litre 232 bar cylinder The interior of the cylinder must be thoroughly dried immediately after cleaning or hydrostatic testing, and the interior inspected to ensure that there is no trace of free water or other ...

  6. Surface-supplied diving equipment - Wikipedia

    en.wikipedia.org/wiki/Surface-supplied_diving...

    The air passes through a filter and the air hose to the diver's demand valve. Small 12 volt diaphragm compressors are used for recreational hookah, with a delivery of around 1.8 bars (26 psi), which severely limits the depth to which air can be supplied. The rubber diaphragm pump usually requires no oil lubricant and delivers oil-free air. [30]

  7. Scuba gas management - Wikipedia

    en.wikipedia.org/wiki/Scuba_gas_management

    Rebreather diver with bailout and decompression cylinders. Scuba gas management is the aspect of scuba diving which includes the gas planning, blending, filling, analysing, marking, storage, and transportation of gas cylinders for a dive, the monitoring and switching of breathing gases during a dive, efficient and correct use of the gas, and the provision of emergency gas to another member of ...

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