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• Make sure that the breathing hose runs down your back
and is not twisted. You can adjust the angle of the helmet
connection as required (Fig. 45).
4.4 Doffing (taking the hood, face shield or
helmet off)
See also the User Instructions for SR 500 Powered Air-Purifying
Respirator.
Leave the polluted area before removing the respiratory protec-
tion inlet covering and SR 500 PAPR fan unit.
• Take off the respiratory inlet covering.
• Switch off the fan.
• Release the belt and remove the fan unit.
• After use, the SR 500 components must be cleaned,
inspected and prepared for reuse (e.g. charge the batteries).
5. Technical Specifications
Shelf life
The respiratory protection inlet coverings have a shelf life of 5
years from the date of manufacture.
Temperature range
Storage temperature: from -4°F to 104°F (-20 °C to +40 °C) at
a relative humidity below 90 %.
Service temperature: from 10°F to 131°F (-10 °C to +55 °C) at
a relative humidity below 90 %.
Hood & Face Shield Materials
Plastic parts are marked with the material code and recycling
symbol.
Airflow Range
During normal operation, the air flow rate is at least 6.2CFM
(175 l/min), which is the manufacturer's recommended mini-
mum flow rate or MMDF. On boosted operation, the air flow
rate is at least 7.9CFM (225 l/min).
Noise Level
Less than 75dBA (excluding external noise).
Heat and Flame Resistance
The SR 520 and SR 530 hood materials are not flame resistant
and must not be used around heat, flames or sparks.
SR 540 Visor and visor frame
Meet the test requirements for Industrial Protective Eyewear
(ANSI Z87.1-2010).
SR 580 Visor and visor frame
Meet the test requirements for Industrial Protective Eyewear
(ANSI Z87.1-2010).
SR 580 Safety helmet
Meet the test requirements for ANSI Z89.1-2009 Type I
Electrical Class G - 2200 Volts, 60 HZ, 1 minute (<3 mA)
Low temperature
Weights
Model
Hood SR 520
Hood SR 530
Face shield SR 540
Helmet SR 580
Approx. weight
.82 lb (360 g)
1.05 lb (480 g)
1.5 lb (680 g)
1.9 lb (875 g)
6. Maintenance
6.1 Cleaning
The person who is responsible for cleaning and maintenance
must have suitable training and be well acquainted with work
of this type.
Sundström cleaning tissues SR 5226 are recommended
for daily care. If the equipment is more heavily fouled, use a
soft brush or sponge moistened with a solution of water and
dishwashing detergent or the like. Rinse the equipment and
leave it to dry. Do not soak respirator inlet coverings in cleaning
solutions or solvents.
Do not wipe the respiratory protection inlet coverings with
strong solvents such as MEK, acetone, or toluene as those
may damage or distort materials.
6.2 Storage
After cleaning, store the equipment in a dry and clean place at
room temperature. Store the face shield with the visor in the
fully raised or fully lowered position. Avoid exposing it to direct
sunlight. Storage temperature: from -4°F to 104°F (-20 °C to
+40 °C) at a relative humidity below 90 %.
6.3 Maintenance schedule
Do not use the SR 500 Powered Air-Purifying Respirator with
respiratory protection inlet covering if the respirator fails any
of the requirements of the user inspection and performance
checks. Do not use the respirator until all necessary repairs
have been made and the respirator passes the performance
check. The following schedule shows the recommended
minimum maintenance procedures required in order to ensure
that the equipment is always in functional condition.
Before use After use Annually
Visual inspection
Performance check
Cleaning
Change of O-ring
for breathing hose
Change of gasket for
breathing hose
Change of exhalation membrane
The SR 580 helmet should be used within 5 years after the
date of production or within 3 years of being taken into use,
whichever of these dates is the earlier.
6.4 Spare parts
Use only parts or accessories as described in these User
Instructions or on the NIOSH Approval Label for the SR 500
Powered Air-Purifying Respirator. Do not attempt to repair or
modify any component of the system except as described in
the User Instructions.
6.5 To change the exhalation membrane
The exhalation membrane is mounted on a pin on the inside of
the valve cover. The cover must be changed at the same time
as the membrane. Proceed as follows:
• Snap off the valve cover from the valve seat. SR 520/SR
530, Fig. 18. SR 540, Fig. 19. SR 580, Fig. 46.
• Slip off the membrane.
• Press the new membrane onto the pin. Carefully check that
the membrane is in contact with the valve seat all round.
• Press the valve cover into place. A clicking sound indicates
that it is in place.
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