Cleaning, Maintenance And Storage - BLS 3000 Série Mode D'emploi

These checks are necessary to ensure that the face seal is fitted correctly. If it is
not, tighten the straps or adjust the mask over the face. Then repeat the check
until the fit is perfect. If the textile harness is used (optional fittings, on demand),
the procedure is the same. If you cannot achieve a proper fit do not enter the
contaminated area.
4.3 Assembling Choose the filters according to the type of contaminant check
the expiry date and screw them to the connector/s, ensuring that the seal at the
bottom of the holes makes good contact. For a correct use of filters, see the
relative user's information enclosed to the same filters and keep attention to use
filters of the same type and class. Now, after the tightness test and the filter check,
you may enter the contaminated area. Note on respirator's use: gas filters shall
be replaced when the user begins to sense odour, taste or irritation. Particle filters
must be replaced at the latest when breathing resistance becomes too high.
4.4 Doffing When you have finished the work, remove the mask by loosening the
lower straps on the headpiece and pulling it off from the chin upwards. If the textile
harness is used (optional fitting, on demand) the doffing procedure is the same.
5 – CLEANING, MAINTENANCE AND STORAGE
TABLE – Scheduled maintenance and cleaning plan
Before use Before every
Type of action
(new mask)
Cleaning
Disinfecting
General visual check
X
Inhalation valve replacement
Inner mask valves
replacement
Exhalation valve replacement
Tightness check (Par. 4.2 )
5.1 – Cleaning and disinfecting Take particular care of any contaminants
deposited on the mask. All cleaning operations should take place in safe areas.
Do not use abrasive substances to clean the visor do not use solvents Use
exclusively this procedure to clean and disinfect the masks:
1) After removing the mask and the contaminated filter, clean under running water
to remove most of the contaminants; then clean more fully by placing in hot water
(temperature not upper to 40°C) with a neutral soap. If disinfection is required,
use a solution of a common disinfectant (based on active chloride in sodium
chloride solution for BLS 5150 BLS 5400 BLS 5250 BLS 5500)
2) Dry the mask with a soft, clean cloth or make it dry naturally.
3) When it will be dry, clean the visor with a clean cotton wool.
5.2 Maintenance for BLS 5150 BLS 5400 BLS 5250 BLS 5500
5.2.1 Monthly and before use check (general visual check)
Examine the mask and check and check that:
1) None of the plastic parts are broken
2) There are no general signs of wear or damage
3) The seals and/or the face piece are not split
4) The membranes and the o-rings are not excessively worn
If the mask has any of these defects, it must not be used before the faulty parts
are replaced.
5.2.2 Replacing the inner mask with relative valves and valve holders To
replace the inner mask N/7 (draw. 11 BLS 5150 BLS 5400; draw. 15 BLS 5250
BLS 5500), equipped with relative valve holders MI/25 (draw. 12 BLS 5150 BLS
5400; draw. 11 BLS 5250 BLS 5500) and inhalation valves NG/26 (draw. 15 BLS
5150 BLS 5400; draw. 23 BLS 5250 BLS 5500), first pull down the locking ring
of the inner mask to release the inner mask, then remove the inner mask from its
housing, unthreading the edges from the inner connection MI/21 (draw. 9 BLS
5150 BLS 5400; draw. 7 BLS 5250 BLS 5500). Replace the inner mask with the
new one, positioning the edges of the hole in the in the fitting groove of the MI/21,
pulling down again the locking ring MI/26, then checking the right assembling of
the valve holders MI/25 equipped with the NG/26 valves.
5.2.3 Replacing the inhalation valve holder and relative inhalation valve for
BLS 5150 BLS 5400 To replace the inhalation valve holder MI/24 (draw. 4), it is
necessary to take it out from its housing on the inner threaded connection MI/20
(draw. 6), pulling it with strength.
Replace the component, check the inhalation valve NG/26 (draw. 5) is in the
right position and then place it again in its housing, keeping attention to place
it straight and with the valve turned into the inner of the mask, checking that the
valve surface is free to move.
5.2.4 Replacing the head harness (and assembling the textile harness, as
accessory) The head harness M/8 (draw. 20 BLS 5150 BLS 5400; draw. 22 BLS
5250 BLS 5500) has 6 adjuster straps and is made in rubber. Replace it if there is
any sign of splitting. To do this, pull the straps out through buckles MI/6 (draw. 16
BLS 5150 BLS 5400; draw. 19 BLS 5250 BLS 5500). Once you have freed all of
the straps, fit the new headpiece by passing the straps through the buckles and
making sure they are fitted securely.
If the textile harness is used (optional fittings, on demand, code 000773), the
Every five
After every
Monthly years
use use
X
X
X X
X
X
X
X
procedure is the same.
5.2.5 Replacing the clamping band If clamping band MI/9 (draw. 17 BLS 5150
BLS 5400; draw. 16 BLS 5250 BLS 5500) is accidentally broken, first remove it
from the head harness M/8 (draw. 20 BLS 5150 BLS 5400; draw.22 BLS 5250
BLS 5500) and from the buckles MI/6 (draw. 16 BLS 5150 BLS 5400; draw.19
BLS 5250 BLS 5500), for this operation see the previous paragraph. Then use a
screwdriver to unscrew the bolt from the nut (draw. 18 BLS 5150 BLS 5400; draw.
21 BLS 5250 BLS 5500 and draw. 19 BLS 5150 BLS 5400; draw. 20 BLS 5250
BLS 5500) and open the clip. When reassembling, be particularly careful that the
face seal and clamping band are centred on the visor. Do this by lining up one end
with the centre mark on the face seal before tightening the bolt.
5.2.6 Replacing the exhalation valve and related o-ring This maintenance
operation requires dismantling the entire membrane holder/exhalation membrane
group MI/21 + NG/11 (draw. 9 BLS 5150 BLS 5400; draw. 7 BLS 5250 BLS
5500 and draw. 8 BLS 5150 BLS 5400; draw. 6 BLS 5250 BLS 5500), using the
proper L key. Before to proceed to this replacing, it is necessary to remove the
inner mask N/7 (draw. 11 BLS 5150 BLS 5400: draw. 15 BLS 5250 BLS 5500)
from its housing, unthreading the edges from the inner threaded connection.
Afterwards taking the mask in one hand and in the other hand the key put the
key perpendicularly to the filter holder using the thin plates as a grip. Unscrew the
valve holder rotating clockwise. Once the membrane holder is removed, replace
the NG/11 membrane (draw. 8 BLS 5150 BLS 5400; draw. 6 BLS 5250 BLS 5500),
inserting it in its housing hole, using for help a drop of liquid soap on the stem of
the new membrane and replace the o-ring MI/18 (draw. 7 BLS 5150, BLS 5400;
draw. 5 BLS 5250 BLS 5500) housing on the inner threaded connection MI/20
(draw. 6 BLS 5150 BLS 5400; draw. 4 BLS 5250 BLS 5500). Reassemble the
parts in the reverse order. To re-set the parts, follow the contrary procedures.
5.2.6 bis Replacing the inhalation membrane for BLS 5250 BLS 5500 To
replace the inhalation membranes NG/27 (draw. 11) present on the two lateral
filter holders Mi/22 (draw. 12) it is first necessary to remove the inner mask N/7
(draw. 15) from its housing, then it is possible to extract, pulling toward oneself,
the NG/27 membranes. After removing the NG/27 membranes, replace them with
new ones, putting them in the respective housing hole, keeping attention to put
them in right position and checking that all the membrane surface is free to move.
Reassemble the inner mask in the reverse order. As this full face mask is designed
for a low maintenance, the available spare parts are not many (see the spare
parts list). In case of damage of other components not listed here, the respirator
must be entirely replaced, please contact BLS S.r.l. for more information.
BLS recommends carrying out the replacing operations listed at the point 5.2.5
and 5.2.6 by BLS itself or by the authorized workshop, recommended on request
by BLS. It is however necessary, at least after the replacing of the inhalation
membrane holder and relative inhalation membrane (par. 5.2.3), the replacing
of the inhalation membrane (par. 5.26 bis), the replacing of the clamping band
( par 5.2.5), the replacing of the exhalation membrane and related o-ring (par.
5.2.6.) and always after particular cleaning and disassembly operations, carry
out an efficiency test (see following par. 5.2.7). If it is not possible to carry out
the efficiency test and in case of particular breaking or replacing, it is necessary
to contact BLS S.r.l. or an authorized workshop. BLS S.r.l. don't take any
responsibility for the bad functioning of the mask due to replacing operations
with non original spare parts, carried out without the efficiency control or by non
authorized workshop.
5.2.7 Mask efficiency test If components have been replaced and every time the
mask is reassembled after particular clearing operations, a test for function and
leak-tightness must be carried out.
The test must be carried out with an appropriate device, made of an inflatable
rubber head, a connection for the facepiece, a connecting hose, a cap to close the
inhalation valve and an appropriate test device (easily available on the market)
to make and control positive and negative pressure inside the mask (BLS can
suggest, on customer's request, all the information about this kind of test device).
If you don't have a test device of this kind, please contact BLS for the components
replacement and the tightness test.
Leak tightness test Fit the mask onto the inflatable head and inflate it until the
mask adheres without wrinkling, gently pull the head harness straps (for further
details, see the instructions for the mask testing apparatus). Dampen with water
the contact area between the membrane and the seat of the valve. Create a
depression of 10 mbar inside the mask. The depression should not decrease by
more than 1 mbar in a minute. If the leak is higher, partially deflate the head and
dampen with water the contact area between the bladder and the mask; finally
re-inflate the head. If the pressure still decreases, check if the valve needs to be
cleaned and repeat the test.
5.3 Storage It is advisable to keep new facepieces in their original packing in
a ventilated store-room, away from possible heat sources. Storage should
preferably be between -10 and + 50 °C.
BLS S.r.l. however recommends to do not use the masks for more than 10 (ten)
years, after that period of time BLS suggests the replace of the mask with a new
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