SEKUR SFERA Serie Manual De Uso Y Mantenimento página 16

Model
SFERA
SFERA SIL
SFERA SP/A
SFERA SP/A SIL
SFERA SP/A
ATEX
SFERA SP/A
ATEX SIL
SFERA SP/A ESA
SFERA SP/A ESA
SIL
SFERA SP/A ASB
SFERA SP/A ASB
SIL
SFERA... = Model (on the threaded connector)
= Manufacturer's identification (LOGO)
xx = Year of manufacture (on the front straps of the harness)
CE 0426 = CE marking and identification number of the notified body carrying out production control
(on the faceblank)
4333.3005 = Spare part reference number (example)
EN 136:98 = Relevant Norm (on threaded connector)
CL 3 = Class of the mask (on threaded connector)
Faceblank distinguishing colour:
BLACK = SFERA ...
YELLOW = SFERA ... SIL
4. Operating principles
The air inhaled through the inhalation valve in the connecting piece is fed into the mask and flows in the inner
part of the visor thus preventing misting. The air enters the inner mask through the check valves and after
use by operator, is exhaled through an exhalation valve in the connecting piece. On the models that contain
the letters SP/A, the exhalation valve is equipped with a compression spring which allows the proper
operation of positive pressure breathing apparatuses connected to the masks. This valve creates an
overpressure inside the mask thus ensuring a high level of safety.
In the case of the masks ASB, donning necessarily involves the presence of the filter that has to be exclusively
a filter P3 ASB. You can then breathe through the dust filter if the regulator is not connected to sources of
compressed air, or in the cases of emergency or to reach or leave the work area.
The breathing mask Sphere SP/A ASB using the filter involves a resistance value higher than that of the
respiratory masks in negative pressure. Therefore, it is normal to have to exhale in a robust way to allow the
opening of the appropriate valves. We recommend the use of the mask Sphere SP/A ASB breathing through
the filter to the time necessary to the operations required unable to connect the system to the compressed
airline supply expected in processing.
5. Mask components
The whole manual refers to the figures that are present at the end of the manual itself. SFERA masks are
made up by the following components (figure 1):
5.1 Faceblank
5.2 Inner mask with check valves
5.3 Patented visor
Screw Exhalation valve
threaded
connector
EN 148-1 Negative pressure
EN 148-1 Negative pressure
EN 148-3 Positive pressure
Positive
EN 148-3
pressure
EN 148-3 Positive pressure
EN 148-3 Positive pressure
DIN58600
Positive pressure
EN 148-1
DIN58600
Positive pressure
EN 148-1
EN 148-3 Positive pressure
EN 148-3 Positive pressure
(Rubber)
(Silicone)
Distinguishing
colour of the
grid
Black
Black
Red
Red
Red
Red
Red
Red
Blue
Blue
16
Faceblank Distinguishing
material colour
Rubber Black
Silicone Yellow
Rubber Black
Silicone Yellow
Rubber Black
Silicone Yellow
Rubber Black
Silicone Yellow
Rubber Black
Silicone Yellow