System Description - Sundstrom SR 507 Gebrauchsanleitung

Compressed air attachment SR 507
1. General information
2. Parts
3. Use
4. Maintenance
5. Technical specification
6. Key to symbols
7. Approval
1. General information
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.
If you feel uncertain about the selection and care of the equip ment,
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.

1.1 System description

The Sundström SR 507 compressed air attachment can be used
together with Sundström human interfaces (hoods SR 520 M/L,
SR 530, SR 561, SR 562, face shield SR 540 EX, SR 570, helmet
with visor SR 580, welding shield/helmet with visor SR 584/SR 580,
welding shield SR 592 and half mask SR 900/SR 951) below
named head-tops. This combination forms a breathing apparatus
with continuous airflow for connection to a compres sed air supply.
The SR 507 is designed for connection to a suitable source of
breathable compressed air. The pressure in the head top prevents
polluted ambient air from entering the head top. A compressed air
supply tube, which must be approved for breathable air, is con-
nected to a control valve that is threaded onto the user's belt. The
control valve can be used for adjusting the airflow rate to the head
top. From the control valve, the air flows through the connecting
adapter to a breathing hose, and then into the head top.
The control valve is equipped with a warning whistle, which will
come into operation if the airflow rate should drop below the mini-
mun design flow rate.
1.2 Applications
The SR 507 is an attachment that enables a given head-top to be
converted between a fan-assisted respiratory protective device and
a protective device with compressed air supply.
The compressed air attachment can be used as an alternative to a
filtering device in all situations in which the latter is recommended.
This applies particularly if the user is doing hard or sustained work
and if the pollutants have poor warning properties or are particularly
toxic. The SR 507 is made of materials that are not liable to give rise
to sparking when subjected to friction, which enables the attach-
ment to be used in an explosive or fire-hazardous environment.
1.3 Warnings/limitations
Note that there can be national differences in the regula tions for
use of respiratory protective equipment.
As a general rule, the user must always be able to retreat to safety
without risk if the air supply should cease or if he/she must take
off the equipment for some other reason.
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Warnings
The equipment must not be used
• If the air flow test or fit test does not produce satisfactory results.
See 3.2.
• If the ambient air does not have a normal oxygen content.
• If the pollutants are unknown.
• In environments that are immediately dangerous to life and health
(IDLH).
• With oxygen or oxygen-enriched air.
• If the user finds it difficult to breathe.
• If you can smell or taste the pollutants.
• If you experience dizziness, nausea or other types of discomfort.
• If the warning whistle sounds. This indicates that the air supply
is lower than recommended.
Limitations
• Anyone who wears a beard or sideboards cannot expect the
head top to be tight.
• A person working in an explosive or flammable environment
must follow any local regulations that may be in force for such
conditions.
• The air supply system should be equipped with an appropriately
rated and adjusted pressure relief safety valve.
• A risk assessment has to be done to avoid possible perilous
connections possible at the workplace, e.g. Nitrox.
• At very high work intensity, negative pressure may occur in
the equipment during the inhalation phase, which may cause
ambient air to be drawn in.
• Use of the equipment together with spiral tube SR 360 is
restricted to situations in which there is little risk of damage to
the tube and if the freedom of movement of the user can be
restricted.
• The equipment is approved only together with Sundström
compressed air supply tube that must be used if CE approval
and product responsibility are to apply.
• The SR 507 is not approved for use with a mobile compressed
air system.
1.4 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. Fig. 7.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 14387:2004 and AS/NZS 1716:2012 - with about 500 g of
activa ted carbon, surrounded by two particle filters - class P3 as
per EN 143:2000 and AS/NZS 1716:2012. The collecting capa-
city 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.
EN