The Automatic Switch Valve on the waist belt, to connect a compressed air breathing apparatus like the BD 96 Mini to a factory airline system or cascade air cylinders. Provides air supply if the airline is disconnected or if the external air source fails.
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Fully automatic change-over valve
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Automatic switching from external air source to BA and back again
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Distinct warning signal when air-supplied by BA
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Warning if BA cylinder is closed
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Application as emergency air supply
