EN-3
Respiratory mask
The mask complies with standard EN136.
Refer to the specific instructions for use for the respiratory mask.
Cylinders
The cylinders used with breathing apparatuses must be made of metal or composite material and contain breathing air in accordance
with EN12021.
The compressed-air cylinders used must comply with European Directive 97/23/EC applicable to
Pressurised Equipment.
For France: When the breathing apparatus is used with two cylinders, the cylinders must
necessarily be connected to each other by a manifold that cannot be removed by hand, with only
one valve to control both cylinders.
The volume of air carried is calculated on the basis of the capacity and filling pressure of the cylinders, for example:
•
1 six-litre cylinder at 300 bar contains:
6 x 300 = 1,800 L of air
•
1 four-litre cylinder at 200 bar contains:
4 x 200 = 800 L of air
•
Or in DUO version:
2 x (4 x 200) = 1,600 L of air
The supply time will depend on the quantity of air carried and the air consumed by the user.
The consumption varies greatly depending on the user and the work done.
The consumption by the wearer is considered to be low, medium or high with a respiratory rate that is:
•
Low: 20 L/min mean output or 63 L/min max. instantaneous output.
•
Medium:
40 L/min mean output or 126 L/min max. instantaneous output.
•
High: 100 L/min mean output or 314 L/min max. instantaneous output.
Theoretical supply time table depending on the cylinder and the work done:
Supply time
depending on work
Cylinders
Filling
pressure
Volume
of air
low
20 L/min
medium
40 L/min
high
100 L/min
4 litres
300 bar
1,200 litres
60 min
30 min
12 min
6 litres
300 bar
1,800 litres
90 min
45 min
18 min
6.8 litres
300 bar
2,040 litres
100 min
50 min
20 min
9 litres
300 bar
2,700 litres
135 min
68 min
27 min
2 x 4 litres
200 bar
1,600 litres
80 min
40 min
16 min
NOTE:
In practice, the actual supply time will be slightly less, particularly at 300 bar, because account must be taken of the air compressibility
coefficient (0.9 at 300 bar).
USE
Only apparatuses that have been regularly maintained in keeping with requirements may be used.
For safety reasons, during regular inspections, it is recommended to check visually if the cylinders for the apparatus contain enough air.
Operating conditions for the apparatus
-30°C to +60°C
Initial checks
Adjusting the collar for one cylinder (Figure 6a)
•
Align the edging, stitched to the strap of the collar, with the left outer side of the backplate.
Adjusting the collar for two cylinders (Figure 6b)
•
Align the edging, stitched to the strap of the collar, with the middle of the backplate.
Closing the cylinder locking collar (mono- and duo-version) (Figure 7)
The buckle of the cylinder collar strap must be on the right of the backplate (cylinder in front of you and pressure reducer to the bottom).
•
Thread the strap into the buckle of the cylinder collar.
•
Pass it over the tightening lever then inside.
•
Pass it back through the buckle of the cylinder collar, gently stretching the strap.
•
Lower the cylinder lever so that it remains locked in the lower position.
•
Pull the cylinder collar strap back over the lever and buckle.
•
Press the end of the strap onto the self-gripping strip.
Positioning the hoses
The medium pressure hose must pass over the wearer's right shoulder and the demand valve must be fixed to the valve holder.
The pressure gauge hose must pass over the wearer's left shoulder.
The pressure allows the charge status in the cylinder(s) to be read easily.
