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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.
Depth gauge. US Marine diver with a diving watch and an analog depth gauge. A digital depth gauge combined with a timer and temperature display, also referred to as a "Bottom timer". A depth gauge is an instrument for measuring depth below a vertical reference surface. They include depth gauges for underwater diving and similar applications.
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.
A means of adding gas to the bladder, generally a low pressure direct feed [notes 1] or power inflator [notes 2] that injects gas from a low pressure hose from a diving cylinder's first stage regulator to the bladder of the BC, and usually an oral inflation option. Gas flow is controlled by a spring loaded, normally closed, manual operated ...
It should be no more than 69" (173.3 cm) above the surface floor the user is standing on (Section 4.2). At 60" (152.4 cm) above the floor, the water pattern should be 20" (50.8 cm) in diameter (Section 4.1.4). If shower enclosure is provided. It should provide 34" in diameter of unobstructed space (86.4 cm) (Section 4.3).
In the UK the pre-nationalisation railway companies standardised around systems operating on a vacuum of 21 inches of mercury (533.4 Torr; 71.1 kPa; 10.3 psi), with the exception of the Great Western Railway, which used 25 inHg (635.0 Torr; 84.7 kPa; 12.3 psi). Sea level air pressure is about 30 inHg (762.0 Torr; 101.6 kPa; 14.7 psi), depending ...
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