ELSA DASH/SPRINT
1
1. INTRODUCTION
1.1 BREATHABLE AIR
Air for compressed air breathing apparatus
may be natural or synthetic. A typical
composition of natural air (at atmospheric
pressure and room temperature) is shown
in
Table 1
.
Element
Mass %
(Dry Air)
Volume %
(Dry Air)
Oxygen
23.14
20.948
Nitrogen
75.52
78.08
Argon
1.29
0.93
Carbon Dioxide
0.05
0.031 4
Hydrogen
0.000 003
0.000 05
Neon
0.001 270
0.001 818
Helium
0.000 037
0.000 524
Krypton
0.000 330
0.000 114
Xenon
0.000 039
0.000 009
Table 1: Breathable Air
The quality of air used to supply and
charge breathing apparatus must conform
to EN 12021 : 1999 (
Requirements for
Breathable Air
).
Fire risk increases when the oxygen level
rises above the value shown in
Table 1
.
Contaminants must be kept to a minimum,
and must not exceed permissible
exposure levels.
Cylinder water content of air at
atmospheric pressure must not exceed 50
mg/m
3
for 200 bar cylinders or 35 mg/m
3
for 300 bar cylinders.
National regulations for compressed air
breathing apparatus must be observed.
1.2 APPARATUS SELECTION
When selecting respiratory protective
equipment the following factors must be
considered:
•
Hazards likely to be encountered
and their effect on the wearer.
•
Physical and emotional stress and
their effect on wearer breathing rate.
•
The type of respiratory protection
required.
In general, constant flow escape breathing
apparatus is NOT suitable for use where:
•
There are unknown hazards.
•
There are no planned escape
routes.
•
There are escape routes that require
physical exertion, e.g.: ladders,
tunnels and hatches.
1.3 TRAINING
These instructions cannot replace an
accredited training course run by fully
qualified instructors in the proper and safe
use of
Sabre
breathing apparatus.
Please contact
Training and Technical
Support Services
or your
Sabre
distributor for training course details.
Training and Technical Support
Services:
Scott Health and Safety Limited
Pimbo Road, West Pimbo,
Skelmersdale, Lancashire,
WN8 9RA, United Kingdom.
Tel: +44 (0) 1695 711711
Fax: +44 (0) 1695 711775
1.4 SERVICING
ELSA
apparatus must be serviced by
personnel who have completed a formal
training course and hold a current
certificate for servicing and repairing
Sabre
breathing apparatus. Details of the
servicing schedule are contained in the
ELSA Dash
and
ELSA Sprint
Service
Manuals, copies of which can only be
obtained by registered holders of a current
certificate.
Your
Sabre
distributor or
Training and
Technical Support Services
will be
pleased to provide training course details
and quotes for service contracts. Please
see previous page for contact details.
1.5 SHELF LIFE
Providing that
ELSA
apparatus is serviced
regularly as described in the
ELSA Dash
and
ELSA Sprint
Service Manuals, there
are no shelf life limitations.
Содержание ELSA Dash
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