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PERSONAL PROTECTIVE EQUIPMENT |
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Class 2 - Air-Supplying |
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Combination-SCBA and
supplied-air respirators are air-line respirators with an auxiliary self-contained air
supply. An auxiliary SCBA is an independent air supply that allows a person to evacuate an
area where a connection to an outside air supply can be made, or enter such an area for a
very short period of time. These devices are approved for use in IDLH atmospheres. If the primary air supply fails to operate, the user can switch to the auxiliary air supply. This allows the wearer to escape from the IDLH atmosphere. Combination air-line respirators with auxiliary SCBA are designed to operate in three modes:
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