Cylinders provide gas to the diver through the demand valve of a diving regulator or the breathing loop of a diving rebreather.ĭiving cylinders are usually manufactured from aluminium or steel alloys, and when used on a scuba set are normally fitted with one of two common types of cylinder valve for filling and connection to the regulator.

A diving cylinder may also be used to supply inflation gas for a dry suit or buoyancy compensator. It may also be used for surface-supplied diving or as decompression gas. When used for an emergency gas supply for surface supplied diving or scuba, it may be referred to as a bailout cylinder or bailout bottle. This may be breathing gas used with a scuba set, in which case the cylinder may also be referred to as a scuba cylinder, scuba tank or diving tank. Diving cylinders to be filled at a diving air compressor stationīreathing gas supply for scuba or surface-supplied diversĪ diving cylinder or diving gas cylinder is a gas cylinder used to store and transport high pressure gas used in diving operations.

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