Sundstrom SR 90 Airline User manual

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Operating instructions
SR 90 Airline
Revision: 02

General information
Instructions for use for SR 90 Airline should be read before use.
The Sundström SR 90 Airline is a breathing apparatus which provides a constant air flow in accordance with
EN 14594:2005, 3A. Available in two sizes, S/M and M/L.
When selecting equipment for SR 90 Airline some of the factors that should be considered are as follows:
• Type of pollutant
• Concentrations
• Work intensity
• Protection requirements in addition to respiratory protective advice.
Risk analysis should be carried by a person who has suitable training and experience in the area.
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Breathable air
Breathable air shall meet at least the following purity requirements:
• the pollutants shall be maintained at a minimum and must never exceed the hygienic limit value.
• the content of mineral oil in the air must be so low that the air will have no oil smell (the threshold of smell is
around 0.3 mg/m3 ).
• the air shall have a sufficiently low dew point to avoid internal freezing of the equipment.
In the event of uncertainty as to whether the above demands have been met, a filter such as the Sundström
type SR 99-1 compressed air filter should be connected.
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Unpacking SR 90 Airline
Packing list:
• Facepiece with breathing hose
• Control valve threaded onto a belt
• Sealing cover
• Pre-filter holder
• Flow meter
• User instructions
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1. Check before use
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Check that the mask is complete, correctly assembled, thoroughly
cleaned and undamaged. Check particularly carefully the inhalation
and exhalation membranes and their seats.
1.1 The membranes are
consumables and must be
replaced if there are any
signs of damage or ageing.
1.2 Check the condition of the
harness.
The head harness is a
consumable item and should
be replaced if there are any
signs of wear or reduced
elasticity.
1.3 Carefully check that the
internal groove of the mask is
clean and undamaged.

2. Functional check
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2.1 Check that the air flow -
measured through the mask -
is at least 150 l/min.
Connect the breathing hose
of the mask to the control
valve.
2.2 Connect the compressed
air supply tube to the control
valve.
2.3 Turn the control valve
knob anti-clockwise as far as
it will go, in order to throttle
the air flow rate to a
minimum.

2. Functional check
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2.4 Place the facepiece in the
bag and grip the opening of
the bag so that it seals
around the breathing hose.
Grip the flow meter with the
other hand and hold it so that
it points vertically up from the
bag.
2.5 Read the position of the
ball in the tube. It should float
level with or just above the
marking on the tube.
If the flow rate is below the minimum value, check that
• The flow meter is vertical.
• The float can move freely.
• The air supply is not restricted by kinks or other restrictions in the
hoses.

3. Filter
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3.1 In environments in which
both gases and particles
occur, such as in spray
painting, gas and particle
filters must be combined.
3.2 Place the particle filter on
top of the cartridge. Grasp
both protective elements.
Squeeze hard until you hear
the particle filter snap onto
the gas filter.
3.3 Check that you have
selected the right filter and
that the use-by date has not
been passed. (Specified on
the filter and is valid provided
that the filter packaging is
unopened.)
3.4 To separate a combined
filter, place a coin it in the
space between the lower lip
of the particle filter and the
small tab molded into the side
of the gas filter. Push firmly
and twist the coin until the
filter pops off.

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3.5 Fit a suitable filter in the
filter attachment
Mount the filter into the mask.
Make sure the arrow marking
points towards the face part
of the mask. Carefully check
that the edge of the filter is in
the internal groove of the
mask.
3.6 Mount pre-filter SR 221 in
the pre-filter holder and
attach this to the filter.
.

4. Putting the facepiece on
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4.1 Put the belt on and adjust
the length.
Arrange the control valve in a
way that allows easy
adjustment of the flow rate
and a strict watch over the
breathing hose, i. e. it must
not be placed on the back of
the waist
4.2 The orange retainment
clip on the breathing hose is
ideal for fastening the hose
close to the body.
Filter
4.3 Fit a suitable filter in the
filter attachment.
4.4 Adjust the harness so that
the face piece is held firmly
but comfortably in place.

5. Fit check
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Check the fit of the mask if you intend to use a back-up filter.
If any leakage is detected, check the inhalation and exhalation valves
or adjust the straps of head harness. Repeat the fit check until there
is no leakage.
Leakage may occur in cases such as if you wear a beard or
sideboards or if your face is unshaven or deeply wrinkled, if you wear
glasses, or if the exhalation valves are defective or dirty.
5.1 Blank off the filter by
using the sealing cover.
5.2 Draw a deep breath and
hold your breath for ten
seconds.
If the fit is good, the mask will
be pressed against your face.

6. Breathing hose/compressed air hose.
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6.1 Unroll the compressed air
hose and make sure that it is
not twisted.
Connect the hose to the
control valve inlet.
6.2 Connect the breathing
hose to the control valve
outlet.

7. Airflow rate
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7.1 Use the control valve
knob to set the air flow rate to
suit your current work
intensity.
In the fully closed position
(turn the knob anti-clockwise),
the flow is about 150 l/min,
and in the fully open position
(turn the knob clockwise), it is
about 320 l/min.

8. Taking the facepiece off
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8.1 When back-upfilter is
used:
Remove the sealing cover, if
fitted.
8.2 Disconnect the
compressed air hose from the
control valve.
Leave the polluted work area
and take the equipment off.
8.3 When sealing cover is used:
Leave the polluted work area and then take the equipment off

9. Releasing the hoses
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9.1 Both couplings are of
safety type and are released
in two stages.
Push the coupling towards
the nipple.
9.2 Pull the locking ring back.

10. Change the exhalation membranes
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10.1 The exhalation
membranes are mounted on
a fixed dowel on the inside of
the valve covers. The covers
should be changed whenever
the membranes are changed.
Snap the valve covers off the
valve seats.
10.2 Prise off the membrane.
10.3 Press the new
membranes onto the dowels.
Carefully check that the
membranes are in contact
with the valve seats all round.
10.4 Press the valve covers
into place.A clicking sound
indicates that the cover has
snapped into place.
Fit check the equipment.

11. Change the head harness
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11.1 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.
11.2 Check that the straps
are not twisted and fit the new
head harness.

12. Change the breathing hose
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12.1 Cut off the hose clip with
a pair of pincers and pull the
hose off.
12.2 Thread the hose clip and
retaining clip onto the new
hose. Connect to the mask
and use a pair of pincers to
nip the hose clip.
12.3 Apply a load to the hose
to check that it is firmly
secured to the mask.

13. Cleaning
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Sundström cleaning tissues SR 5226 are recommended for daily
care.
If the mask is heavily soiled, use a warm (up to +40 °C), mild soap
solution and a soft brush, followed by rinsing with clean water and
drying in air at room temperature.
If necessary, spray the product with 70 % ethanol or isopropanol
solution for disinfection.
NOTE! Never use solvent for cleaning.
13.1 Remove the filter.
• Remove the covers for the
exhalation valves and remove
the membranes.
• Remove the inhalation
membrane.
• Remove the head harness.
• Clean as described above.
13.2 Critical areas are the
exhalation membranes and
the valve seats, which must
have clean and undamaged
contact surfaces.
13.3 Inspect all parts and replace with new parts, as necessary.
Leave the mask to dry, and then assemble it.
Carry out a fit check.

14. Maintenance schedule
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The schedule shows the minimum requirements on maintenance
routines to assure the user that the equipment will always be in
usable condition.
Disinfection
See section 14 for disinfection intervals.
• After cleaning in accordance with section 13 immerse the parts in a
suitable disinfectant for about 5 minutes.
• Rinse with clean water and allow to dry in air at room temperature.
• Leave the mask to dry, and then assemble it.
• Carry out a fit check.
Before use After use Annually
Visual inspection
•
Functional check
•
Disinfection
•1) •
Cleaning
•
Membrane change
•
Head harness change
•
1) If the equipment is not for your personal use