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 MSA Dual-Supply PremAire System Upgrade Kit
A major advantage of the PremAire dual-supply option is improved mobility,because workers need not remain tethered to a single air-supply hose throughout the work period.To accommodate this option, the PremAire manifold features two air inlet ports:a MAIN inlet and a DUAL-SUPPLY inlet. Both are used to deliver respirable air to the user whenever connected to a pressurized air source.
With the dual-supply capability,users can connect from one pressurized continuous air source to another without losing continuity of air flow. When the first length of air-supply hose has reached its limit, the wearer simply plugs into a second approved air source and disconnects from the first. This technique is known as “leapfrogging” because it gives workers the ability to move from station to station without disrupting the supply of air.
Additionally, the dual-supply option can be used in conjunction with the Duo-Twin option for increased versatility and respiratory protection in non-IDLH atmospheres.
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