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4.4.3 Inhalation membranes
One membrane is in the centre of the inner mask on
a fixed dowel.
• Prise off the membrane and fit a new membrane.
Fig. 16.
Two membranes are fitted, i.e. one on each inside
of the inner mask. Fig. 16. The dowels for these
membranes are removable and should be changed
whenever the membrane is changed.
• Prise off the membranes and dowels.
• Prise the new membranes onto the new dowels.
Fig. 17.
• The membrane should rest on the larger flange,
i.e. thread the dowel with the membrane from the
inside of the mask, through the valve seat, with the
smaller flange first. Fig. 18.
4.4.4 Exhalation membranes
The exhalation membranes are mounted on a fixed
dowel on the inside of the valve covers on each side
of the outer mask. The covers should be changed
whenever the membranes are changed.
• Snap the valve covers off the valve seats. Fig. 19.
• Prise off the membrane. Fig. 20.
• Press the new membranes onto the dowels. Care-
fully check that the membranes are in contact with
the valve seats all round.
• Press the valve covers into place. A clicking sound
indicates that the cover has snapped into place.
• Perform a tightness check as described in
section 2.4.
4.4.5 Head harness
The head harness can be ordered as a spare part only
as a complete harness.
• Snap the strap holders of the head harness off the
mask strap mountings. Fig. 21, 22.
• Check that the straps are not twisted and fit the
new head harness.
4.4.6 Breathing hose
• Disconnect the coupling nipple connection at the
mask and at the regulator. See 2.5.
• Connect the new breathing hose to the mask and
to the regulator.
8
5. List of parts
The item numbers below refer to Fig. 1. at the end of
the user instructions. Parts marked with an asterisk
(*) are not shown.
5.1 Spare parts
Item Part
1
Visor, polycarbonate
2
Upper frame half
3
Head harness, fabric
4
Set of membranes
a) Exhalation, two
b) Valve covers, two
c) Inhalation, three
d) Dowels, two
5
Pre-filter holder
6
Filter adapter SR 280-3
7
Seal
8
Flow meter
9
Carrier strap
10
Belt
11
Regulator assembly SR 350
12
Sealing cover
13.
Breathing hose assembly
14
Sealing plug
*
Mask without breathing hose
5.2 Accessories
Item Part
*
Spectacle frame SR 341 for
corrective lenses. Fig. 23
*
Test adapter SR 328
*
Visor, laminated glass
*
Welding cassette SR 84. Fig. 24
*
Pre-filter holder 5153-2
*
Microphone SR 342. Fig. 25
*
Head harness, rubber
*
Spark arrester SR 336
*
Storage box SR 344
*
SR 5226 Cleaning tissues. Box of 50
*
SR 5226 Cleaning tissues. Box of 1,000 H09-0402
*
SR 358 plastic hose. See section 3
*
SR 359 rubber hose. See section 3
6. NIOSH/DHHS Labels
Separate insert pages included with this booklet.
Order No.
R01-1201
R01-1202
R01-1203
R01-1204
-
-
-
-
R01-0605
H09-0212
R01-1205
R03-0346
R01-1206
R03-1510
R03-1021
R03-1406
R03-1003
R03-1005
R03-1006
Order No.
T01-1201
T01-1202
T01-1203
T01-1212
R01-0604
T01-1213
T01-1215
T01-2001
T01-1214
H09-0401
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