Sundstrom SR 63 Mode D'emploi page 17

SR 63 Compressed air hood
1 General information
2 Use
3 Technical specification
4 Maintenance
5 List of parts
6 Approvals
1. General information
The Sundström SR 63 compressed air hood is a respiratory protec-
tive device 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 1716:2012. If
you have any questions regarding the selection and maintenance
of equipment, consult your work supervisor or get in touch with
the sales outlet. You can also contact the Sundström Safety AB's
Technical Support department.
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 63 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. In addition, the SR 63 is used in environments in which the
concentration or type of pollutants is such that the use of a filtering
device is not permissible. The SR63 can also be used in flammable
atmospheres, since all parts are made from materials wich cannot
give rise to frictional sparks.
1.2 System description
The equipment is designed for connection to a suitable source of
compressed air supply. The pressure in the hood prevents polluted
ambient air from entering the hood.
A compressed air supply hose intended for breathable air is con-
nected to a control valve which is secured to a belt. The control
valve is used for adjusting the air flow rate to the hood. A warning
whistle on the valve comes into operation if the air flow rate should
drop below the recommended value.
From the control valve, the air flows through a breathing hose to
a connection at the rear of the hood. From the connection, the
air flows through a passage to the front of the hood, where it is
distributed over the surface of the visor. The hood, which covers
the head, neck and parts of the shoulders, is secured to an adjust-
able head harness. The replaceable visor is scratch-resistant. If
protection against spatter and splash is required, the visor can
be protected by means of a thin protective film available in sets of
three. Excess air in the hood is discharged through an exhalation
valve at the front of the hood. An adjustable elastic strap runs
around the neck region of the hood.
1.3 Breathable air
The breathable air shall conform to 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 must be so low that the air has 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. Fig. 12. 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
• Hood with breathing hose
• Control valve
• Belt
• Flow meter
• Protective film
• User instructions
2.3 Functional check
On every occasion before the hood is used, check that the air
flow - measured in the hood - is at least 150 l/min:
• Connect the breathing hose of the facepiece to the control valve.
Fig. 3
• Connect the compressed air supply tube to the control valve.
Fig. 4
• Turn the control valve knob anti-clockwise as far as it will go, in
order to throttle the air flow rate to a minimum. Fig. 3
• Place the hood in the bag and grip the opening of the bag so
that it seals around the breathing hose. Fig. 2.
• Grip the flow meter with the other hand and hold it so that it
points vertically up from the bag.
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.
2.4 Putting the hood on
• 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.
• Connect the breathing hose of the hood to the outlet of the
control valve. Fig. 3.
• Unroll the compressed air tube and make sure that it is not
twisted.
• Connect the tube to the control valve inlet. Fig 4.
• The hood is now being supplied with air, and you can put it on.
If necessary, the width and height of the head harness can now
be adjusted. See 4.4.2.
EN
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