Sundstrom SR 90 Airline User manual

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Operating instruction
SR 90 Airline

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General information
The Sundström SR 90 Airline is a breathing apparatus which is supplied with a
continuous flow of air and is designed for connection to a compressed air supply in
accordance with European Standard EN 14594: 2005 and AS/NZS 1716:2003.
The unique feature of the SR 90 Airline is the scope it provides for filter back-up.
The SR 90 Airline is available with the face piece made of two different materials, i.e.
silicone or TPE, and in two sizes, i.e. M/L or S/M.
If you feel uncertain about the selection and care of the equipment, consult your work
supervisor or get in touch with the sales outlet. You are also welcome to get in touch
with the Technical Service Department at Sundström Safety AB.
Use of a respirator must be part of a respiratory protection program. For advice see
EN 529:2005 or AS/NZS 1715:1994.
The guidance contained in these standards highlights important aspects of a
respiratory protective device program but does not replace national or local
regulations.

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2.1 Unpackning
2.2 Packing list
Check that the equipment is complete
in accordance with the packing list and
that no transport damage has
occurred.
• Face piece with breathing hose
• Control valve threaded onto a belt
• Sealing cover
• Pre-filter holder
• Test disc
• Flow meter
• User instructions
2.3 Functional check
Check before use
Check that the mask is complete,
correctly assembled, thoroughly
cleaned and undamaged.
Check particularly carefully the
inhalation and exhalation membranes
and their seats.
Replace with new membranes if signs
of damage.

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The membranes are consumables and
must be replaced if there are any signs
of damage or ageing.
Carefully check that the internal groove
of the mask is clean and undamaged.
Check the condition of the harness.
Replace with new harness if lost
elasticity or torn out.

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On every occasion before the
equipment is used, check that the air
flow –measured through the face piece
is at least 150 l/min.
Proceed as follows:
Connect the breathing hose to the
control valve.
Connect the compressed air hose to
the control valve.
Turn the control valve knob anti-
clockwise as far as it will go in order to
throttle the air flow rate to a minimum.

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Place the equipment in the bag, and
grip the lower part of the bag so that
the bag seals around the breathing
hose.
Grip the flow meter with the other hand
and hold it so that the tube points
vertically up from the bag. If the flow
rate is below the minimum value, check
that:
• the flow meter is vertical
• the ball can move freely
• the air supply is not restricted by kinks
or other restrictions in the hoses.
Combination filter
Check that you have selected the right
filter and that the used-by date has not
been passed.
In areas with gas and particles for
example in paint brushing, gas and
particles should be combined.

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Attach the filters to each other. The filter
arrow marks should point towards the
mask. The gas filter should be mounted
closest to mask.
Pre-filter
Fit pre-filter SR 221 in the pre-filter
holder and press it into place on the
filter.
Mounting filter into mask
Mount back up filter or sealing cover.
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.

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Mount pre-filter SR 221 in the pre-filter
holder and attach this to the filter.
2.4 Putting the face piece on
Belt with control valve
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.
Fitting mask onto face
Adjust the harness so that the face
piece is held firmly but comfortably in
place.

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Use the test disc supplied to test the
tightness.
Place the test disc in the pre-filter holder
supplied and fit the holder to the filter.
Use the test disc supplied to test the
tightness.
Place the test disc in the pre-filter holder
supplied and fit the holder to the filter.
Take a deep breath and hold your
breath. If the face piece is tight, it will be
pressed against your face. If the face
piece is not tight, this may be because
you wear a beard, because your face is
unshaved or is deeply wrinkled, or
because the size of your face is
uncommon.
Leakage may also occur through dirty or
defective exhalation valves. N.B. The
disc is intended only for tightness testing
and should be removed after the test has
been completed.
If the sealing cover is used, the tightness
test can be carried out with this cover
fitted.

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Breathing hose / Compressed air hose
Connect the breathing hose of the face
piece to the control valve outlet.
Unroll the compressed air tube and
make sure that it is not twisted.
Connect the tube to the control valve
inlet.
The face piece is now being supplied
with air, and you can put it on.
The breathing hose retaining clip which
is supplied can be used to advantage for
securing the breathing hose to your
body.
Air flow
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.