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Extended Duration Breathing Apparatus (EDBA) Instructor Reference Guide - February 2018, Version 1.0
@
NARU_Education
www.narueducationcentre.org.uk
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First Stage Reducer and Cylinder Connector
Reducer is made from nickel plated
marine brass and has a ten - year
service life.
Designed to reduce the compressed
air in the cylinder (200-300bar) down
to 6-9 bar and can deliver 1000 l/min.
At 20 bar it can deliver 550 l/min.
At 10 bar it can deliver 300 l/min.
Two outlet ports, one providing dual
high and medium pressure air to
Bodyguard
®
7000, and the other outlet
providing medium pressure to LDV.
Medium pressure port incorporates
a pressure relief valve that operates
between 11-16 bar and dumps
400 l/min.
The dual pressure port (medium and
high pressure) feeds the warning
whistle unit (WWU) which activates
at 55 (+/- 5 bar) and sounds at 90dBA.
At the outlet end of the hose is a
female quick release coupling (QRC)
that is used to attach the male coupling
of the lung demand valve (LDV).
Dual High Pressure Port - Fitted to
this port is the unique dual function
hose assembly that incorporates the
in-line whistle warning unit, (high
pressure activated - medium
pressure operated), and a high
pressure (HP) contents gauge for
the monitoring of the air pressure
in the compressed air cylinder.
Cylinder Connector
Chrome plated marine quality brass.
Contains a nitrile O-ring.
Pivots to ease attachment to cylinder.
Cylinder
Connector
Mechanical
whistle
Bronze
sintered
filter
Nitrile
O-ring
Anti-tamper
disk
Reducer
The reducer is
factory set and
sealed and
must not be
tampered with
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