17
The filters are connected to the Masks by means of special bayonet
type coupling. Two filters of the same specification shall be coupled
simultaneously.
2.9 The Masks are delivered packed in individual boxes.
3
Completeness
3.1 Completeness of the mask for delivery:
– mask
– 1 piece;
– plastic bag
– 1 piece;
– box
– 1 piece;
– Instructions for use
– 1 copy with the product.
4
Mask Operation
4.1 The protective principle of the Mask is based on the supply of
the air, preliminary cleaned with the filter, to human respiratory system
and at the same time on the protection of the face and eyes against
contact with hazardous substances.
4.2
The Mask (see figure 1)
consists of the visor (1), sealer (2), upper
housing (3), lower housing (9), valve unit (4), undermask (5), filter
bayonet type coupling unit (6), head harness (7), and head band (8).
4.2.1 The visor (1) represents a basic part and serves for mounting of
other parts and for providing a wide panoramic view to the user wearing
the Mask.
4.2.2 The elastic sealer (2) with the double obturator (10) has five
eyelets: one frontal eyelet (11) two temporal eyelets (12), and two cheek
eyelets (13).
The temporal and frontal eyelets have one hole and the cheek
eyelets have two holes to insert the buttons (38).
The double obturator assures secure sealing of the Mask on the
person’s face.
The rubber sealer is attached to the visor by means of the upper (3)
and lower (9) housings, crewed to each other by two screws (14) with
washers (15), and nuts (16).
4.2.3 The valve unit (4) with an exhalation valve is assembled in the
central hole of the visor and is sealed by means of the O-ring (17) during
the tightening of the nut (18).
