Firefighter

Closed-circuit SCBA

Reference : SP104

Used for extended operations

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(9 Avis)

Closed-Circuit Self-Contained breathing apparatus (CC-SCBA) devices designed for use as respiratory protection during entry into hazardous atmospheres that can be Immediately Dangerous to Life and Health (IDLH) are described as an apparatus of the type in which the exhaled breath is rebreathed by the wearer after the carbon dioxide has been effectively removed and oxygen concentration restored to suitable levels.

 

The closed-circuit type filters, supplements, and recirculates exhaled gas: see rebreather for more information. It is used when a longer-duration supply of breathing gas is needed, such as in mine rescue and in long tunnels, and going through passages too narrow for a big open-circuit air cylinder.