Sundstrom SR 90 Airline Instrucciones De Uso página 23

Contents
1 General information
2. Use
Technical specification
3.
4. Maintenance
5 List of parts
Approvals
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1. General information
The Sundström SR 90 Airline is a breathing apparatus which
provides a constant air flow in accordance with EN 14594:2005
and AS/NZS 1716:2012 when it is connected to compressed
air. The unique feature of the SR 90 Airline is its filter backup
option. The SR 90 Airline is made of silicone and is available in
two sizes, S/M and M/L.
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 1715:2009.
The guidance contained in these standards highlights important
aspects of a respiratory protective device program but does not
replace national or local regulations.
1.1 Applications
The SR 90 Airline can be used as an alternative to filtering devices
in all situations in which the latter are recommended. This applies
especially if the user is doing hard or sustained work, and if the
pollutants have poor warning properties or are particularly toxic.
1.2 System description
The SR 90 Airline is designed for connection to a suitable source of
breathable compressed air. The pressure in the facepiece prevents
polluted ambient air from entering the facepiece.
• A Sundström compressed air supply tube is connected to
a control valve, which is threaded onto the user's belt. The
control valve can be used for adjusting the airflow rate to the
facepiece.
• The control valve is equipped with a warning whistle, which
will come into operation if the airflow rate should drop below
the recommended value.
• From the control valve, the air flows through a breathing hose
with check valve and into the facepiece. The connection in the
facepiece is provided with an air distributor that also serves as
a silencer.
In order to prevent the admission of polluted air, the filter mounting
must be blanked off. One of the following methods can be used:
1. Suitable filter/filter combination is inserted in the filter attach-
ment. The equipment can then be used as a filter device when
compressed air is not available, for instance when moving from
one working zone to another or if there is an unintentional air
supply stoppage.
2. The filter backup can be covered with a cover to extend the
service life of the filter. The cover must of course be removed
to be able to breathe air through the filter.
SR 90 Airline
1.3 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/m
• 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. Fig. 13. The SR 99-1
compressed air filter consists of a pre-collector and a main filter.
The main filter consists of a gas filter section (class A3 as per EN
141:1990 and AS/NZS 1716:2012) with about 500 g of activated
carbon, surrounded by two particle filters (class P3 as per EN
143:1990 and AS/NZS 1716:2012). The collecting capacity is
100 - 150 g of oil. For further particulars of breathable air, see
European Standard EN 132:1998, Australian Standard AS/NZS
1715:2009 and any other national regulations that may be in force.
2. Use
2.1 Unpacking
Check that the equipment is complete in accordance with the
packing list and that no transport damage has occurred.
2.2 Packing list
• Facepiece with breathing hose
• Control valve threaded onto a belt
• Sealing cover
• Pre-filter holder
• Flow meter
• User instructions
2.3 Functional check
• Check that the mask is complete, correctly assembled,
thoroughly cleaned and undamaged.
• Check particularly carefully the inhalation and exhalation mem-
branes and their seats. The membranes are consumables and
must be replaced if there are any signs of damage or ageing.
• Check the condition of the head harness. The head harness
is a consumable item and should be replaced if there are any
signs of wear or reduced elasticity.
• Check that the air flow - measured through the facepiece - is
at least 150 l/min. Proceed as follows:
Connect the breathing hose to the control valve. Fig. 3.
o
Connect the compressed air hose to the control valve.
o
Fig. 4.
Turn the control valve knob anti-clockwise as far as it will
o
go, in order to throttle the airflow rate to a minimum. Fig. 3.
Place the facepiece in the bag and grip the opening of the
o
bag so that it seals around the breathing hose.
Grip the flow meter with the other hand and hold it so that
o
it points vertically up from the bag. Fig. 2.
Read the position of the ball in the tube. It should float level
o
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.
EN
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