MSA
DESCRIPTION
AirMaXX classic
7
2.1. Standard Model (AirMaXX classic)
The two-piece back plate of the compressed air breathing apparatus is adjustable
to three different lengths and should be adjusted to the user's height. The
pressure lines passes through the sliding upper part from the pressure reducer to
the pressure gauge and medium pressure coupling. They are fixed in special
receptacles and thus are always in the correct position.
The carrying belts and the hip belt are adjustable in length. The hip belt is fixed to
the back plate elastically. It will automatically return to the horizontal position on
installation.
One or two compressed air cylinders can be placed in the cylinder support. The
cylinder retaining strap is freely adjustable and after inserting the compressed air
cylinder(s), it is tightened and secured using the tension clamp.
Fig. 2
Pressure reducer
1
Warning device (signal whistle)
2
Compressed air cylinder connection
3
Pressure gauge line
4
Medium pressure line
The pressure reducer is mounted in the lower area of the back plate (
On the pressure reducer, there is a relief valve, a warning device, the pressure
gauge line and the medium pressure line. The pressure reducer reduces the
cylinder pressure to approx. 7 bar and the relief valve activates on non-permitted
pressure rise to prevent damage insuring the continued supply of breathable air.
A water-tight encapsulated and shock-protected pressure gauge is connected to
the pressure reducer by the flexible pressure gauge line. The pressure gauge has
an easily readable, luminescent dial.
A lung governed demand valve or a full face mask is connected to the coupling
on the medium pressure line.
The acoustic warning device (signal whistle) triggers a continuous warning signal
when the cylinder pressure drops below 55 ±5 bar. It continues to sound
continuously, medium-pressure dosed until the usable air supply is nearly
exhausted. The warning device functions without an injector, meaning that no
ambient air is drawn in to produce the audible signal.
The breathing apparatus can be equipped with an Integrated Control Unit (ICU)
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3
2
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