Operating Principles - Dpi Sekur SFERA Manuel D'utilisation Et D'entretien

Model
SFERA
SFERA SIL
EN
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...
xx
CE 0426
4334.5118
EN 136:98
CL 3
Faceblank distinguishing colour:
BLACK
YELLOW
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
Screw Exhalation
threaded valve
connector
Negative
EN 148-1
pressure
Negative
EN 148-1
pressure
Positive
EN 148-3
pressure
Positive
EN 148-3
pressure
Positive
EN 148-3
pressure
Positive
EN 148-3
pressure
DIN58600 Positive
EN 148-1 pressure
DIN58600 Positive
EN 148-1 pressure
Positive
EN 148-3
pressure
Positive
EN 148-3
pressure
= Model (on the threaded connector)
= Manufacturer's identification (LOGO)
= Year of manufacture (on the front straps of the harness)
= CE marking and identification number of the notified body carrying
out production control (on the faceblank)
= Spare part reference number (example)
= Relevant Norm (on threaded connector)
= Class of the mask (on threaded connector)
= SFERA ...
= SFERA ... SIL
Distinguishing Faceblank
colour of the material
grid
Black
Black
Red
Red
Red Rubber
Red
Red
Red
Blue
Blue
(Rubber)
(Silicone)
18
Distinguishing
colour
Rubber Black
Silicone Yellow
Rubber Black
Silicone Yellow
Black
Silicone Yellow
Rubber Black
Silicone Yellow
Rubber Black
Silicone Yellow