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The basic device 4500 PL / BN-AFG-NLV is a connector between the full face mask according to EN 136 and compressed-air supply hose.DZS 9 / DZS 9R to the compressed-air source and includes an positive pressure demand valve with an ESA unit plug-in... connection according toDIN 58600.In addition to an emergency air supply NLV function in conjunction with an automatic switch valve, the 4500 PL/BN-AFG-NLV device has an integrated fall protection which is required, for example for the use in containers.The safety harness is also the harness of the emergency air supply and is connected directly to the back support plate. If the compressed air supply fails,the switch valve changes over to the compressed air cylinder (2-3 l volume). The warning signal inthe demand valve alerts the user in a way that it cannot be overheard.

Additional Information

Basic device, positive pressure demand valve, unit plug-in connection ESA, automatic change over valve for emergency air supply, safety harness
A distinction is made between devices with a control valve
(continuous flow air supply)
automatically operated devices (demand valve).
Compressed air-line breathing apparatuses with demand valves
only supply breathing air when the user of the respirator
is breathing in. These devices consume less air than
compressed air-line breathing apparatuses
with a continuous volume flow.
A compressed air-line breathing apparatus with a demand valve
is particularly suitable for breathing air supply from compressed-air
One differentiates between negative pressure and
positive pressure devices. Devices with positive pressure generate positive pressure
in the face piece. The positive pressure prevents
the entry of hazardous substances from the ambient atmosphere
into the face piece.
Compressed air-line breathing apparatus with demand valve
Regardless of the ambient atmosphere, compressed air-line respirators offer the most comprehensive protection against
damaging ambient conditions. The required air is supplied to the face piece
via supply hoses i.e. the users move in a defined
operating range during work which is limited by the hose lengths. The breathing air is provided from compressed-air cylinders
compressed-air networks or compressors. In this way, long operating times can be achieved.
EN 14593-1