Sundstrom SR307 Technical manual

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SR 307
Compressed air attachment
Revision: 03
Operation instruction

General information
Instructions for use for SR 307 should be read before use.
The Sundström SR 307 compressed air attachment can be used together with Sundström half masks, and
with full masks of all makes with standard thread in accordance with EN 148-1:1999.
This combination then forms a breathing apparatus with continuous air flow for connection to a compressed air
supply in accordance with EN 14594:2005 and AS/NZS 1716:2012.
Use of a respirator must be part of a respiratory protection program.
For advice see EN 529:2005 or AS/NZS 1715:2009. 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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Breathable air
Breathable air shall meet at least the following purity requirements according to EN 12021:2014:
• the pollutants must be maintained at a minimum and must never exceed the hygienic limit value
• the content of mineral oil shall 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 ensure that no internal freezing will take place in 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
Packing list
• Connection adapter with hose
• Control valve
• Belt
• Locking ring
• Flow meter
• User instructions
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1.Functional check
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1.1 Check that the minimum
flow of air through the adapter
is about 150 l/min. Proceed
as follows:
Connect the breathing hose
to the control valve.
1.2 Connect the compressed
air hose to the control valve.
1.3 Turn the control valve
knob anticlockwise as far as it
will go in order to throttle the
air flow rate to a minimum.

1.Functional check
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1.4 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.
1.5 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 ball can move freely
• the air supply is not restricted by kinks or other restrictions in the
hoses.

2.Putting the equipment on
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2.1 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.
2.2 Then fit the connection
adapter of the compressed air
attachment to the face piece.
2.3 In combination with a full-
face mask, the locking ring
should always be used for
securing the mounting of the
connection adapter.

2.Putting the equipment on
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2.4 Connect the breathing
hose of the compressed air
attachment to the control
valve outlet.
2.5 Connect the tube to the
control valve inlet. The face
piece is now being supplied
with air and you can put it on.
Then adjust the harness so
that the face piece is held
firmly but comfortably in
place. See the user
instructions for the face piece
you are using.
2.6 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.

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3.1 Leave the polluted work
area before taking the
equipment off.
Remove the face piece.
Both couplings are of safety
type and are released in two
stages.
1. Push the coupling
towards the nipple.
3.2
2. Pull the locking ring
back.
3.Taking the equipment off

4.Cleaning
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The SR 307 should be cleaned in the following manner: Use a piece
of soft cloth or a sponge dipped in a solution of water and
dishwashing detergent or the like. Rinse and leave to dry. In the event
of more serious soiling, white spirit or similar degreasing agent may
be used. Then wash with dishwashing detergent solution, rinse and
leave to dry. Sundström cleaning wipes SR 5226 are recommended
for daily care.
For particulars of cleaning of the Sundström half mask and full mask,
see the appropriate user instructions.
Sundström cleaning wipes
SR 5226 can be used for
daily cleaning.

5.Maintenance schedule
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5.1 The schedule below shows the minimum requirements on
maintenance routines to assure the user that the equipment will
always be in usable condition.
Before
use
After
use Annually
Visual inspection
• • •
Functional check
• •
Cleaning
•

6.Breathing hose
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6.1 To change the breathing
hose, proceed as follows:
Cut off the hose clip with a
pair of pincers and pull the
hose off.
6.2 Thread the hose clip and
retaining clip onto the new
hose.
6.3 Connect to the adapter
and use a pair of pincers to
nip the hose clip.
6.4 Apply a load to the hose
to check that it is firmly
secured to the adapter.