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2. Diving regulator - Wikipedia

   en.wikipedia.org/wiki/Diving_regulator

   A diving regulator or underwater diving regulator is a pressure regulator that controls the pressure of breathing gas for underwater diving.The most commonly recognised application is to reduce pressurized breathing gas to ambient pressure and deliver it to the diver, but there are also other types of gas pressure regulator used for diving applications.

3. Mechanism of diving regulators - Wikipedia

   en.wikipedia.org/wiki/Mechanism_of_diving_regulators

   This opens the high pressure valve permitting gas to flow past the valve seat into the low pressure chamber. When the diver stops inhaling, pressure in the low pressure chambers rises and the diaphragm returns to its neutral flat position and no longer presses on the valve lifter, shutting off the flow until the next breath is taken. [1]: 9–13

4. Diving air compressor - Wikipedia

   en.wikipedia.org/wiki/Diving_air_compressor

   A diving air compressor is a breathing air compressor that can provide breathing air directly to a surface-supplied diver, or fill diving cylinders with high-pressure air pure enough to be used as a hyperbaric breathing gas. A low pressure diving air compressor usually has a delivery pressure of up to 30 bar, which is regulated to suit the ...

5. Air-line fitting - Wikipedia

   en.wikipedia.org/wiki/Air-line_fitting

   30 20/30 H US Industrial 3/8" HP 8 ISO 6150C 170.08 381 84 ARO 310 9 014.09 40 AA Scandinavian 9.5/10 9.5/10 032.10 408 32/1800 Eurostandard 10 10 027 410 27 Schrader 1/2" 017.10 TL US Industrial 1/2" 11 A-A-59439, ISO 6150B 037 550 37 20/30 G US Industrial 1/2" HP 11 ISO 6150C 170.11 471 Tru-Flate/Automotive 1/2" 10 G German/Walther 12 12 200.12

6. Gas blending for scuba diving - Wikipedia

   en.wikipedia.org/wiki/Gas_blending_for_scuba_diving

   The required partial pressure of nitrogen is therefore 230 bar x 40% = 92 bar, so the air top-up pressure is 92 bar/79% = 116 bar (for a 3,000 psi fill this would be 3,000 x 40% / 79% = 1,500 psi of air). The remaining pressure of 230 bar - 92 bar - 116 bar = 22 bar is the added oxygen pressure required for the mix (for a 3,000 psi fill this ...

7. Pressure regulator - Wikipedia

   en.wikipedia.org/wiki/Pressure_regulator

   A typical nominal regulated gauge pressure from a medical oxygen regulator is 3.4 bars (50 psi), for an absolute pressure of approximately 4.4 bar and a pressure ratio of about 4.4 without back pressure, so they will have choked flow in the metering orifices for a downstream (outlet) pressure of up to about 2.3 bar absolute.