A diving regulator is a pressure regulator used in a scuba set that supplies the diver with breathing gas at ambient pressure from one or more diving cylinders. The gas may be air or one of a variety of specially blended breathing gases. A gas pressure regulator has one or more valves in series, which let the gas out of a gas cylinder in a controlled way, lowering air pressure at each stage.
The terms "regulator" and "demand valve" are often used...
more
A diving regulator is a pressure regulator used in a scuba set that supplies the diver with breathing gas at ambient pressure from one or more diving cylinders. The gas may be air or one of a variety of specially blended breathing gases. A gas pressure regulator has one or more valves in series, which let the gas out of a gas cylinder in a controlled way, lowering air pressure at each stage.
The terms "regulator" and "demand valve" are often used interchangeably, but a demand valve is the part of a regulator that delivers gas only while the diver is breathing in and reduces the gas pressure to ambient. In single hose regulators, it is part of the second stage held in the diver's mouth by a mouthpiece. In double hose regulators it is part of the regulator attached to the cylinder.
For the history of the diving regulator, see Timeline of diving technology.
The parts of a regulator are described in downstream order as following the gas flow from the cylinder to its final use.
In an open...
less
