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Issue date: 17 November 2006
17 of 80
LFB image 1136797
LFB image 1136792
9.5
Two of the hoses that connect to these ports are looped through the
central hole in the backplate and located into the respective channel in
the adjustable shoulder yoke, from which they are directed and
secured to the shoulder pads.
9.6
The hose to the second person connection is run up the left hand side
of the backplate.
9.7
The route of the hoses from the reducer, to the guide slots in the
shoulder yoke are set to allow for full and free linear movement of the
yoke during height adjustment.
9.8
Fitted to the medium pressure port is a flexible and anti-kinking rubber hose assembly.
9.9
The inlet fitting of the hose incorporates a pressure relief valve feature.
9.10
At the outlet end of the hose is a female QRC. This female QRC is used to attach to the male
coupling of the LDV.
9.11
The hose is manufactured from Ethylene-Propylene-Diene-Monomer (EPDM) rubber.
9.12
Fitted to this port is the hose assembly that supplies the EMU for monitoring the air pressure in
the compressed air cylinder.
9.13
The hose construction, although appearing similar to medium pressure hoses, differs in its
internal construction. Inside the outer EPDM rubber hose assembly is a fine bore copper capillary
tube that is coil wound around a multi-strand length of phosphor bronze wire. The capillary tube
and wire are then brazed to each of the end fittings of the capillary tube assembly.
9.14
High pressure air flows through the bore of the capillary tube to the EMU which is protected by
the rubber outer hose.
10
Second person connection
10.1
The second person connection is an additional feature fitted
to the PSS 7000 BA set. The second person hose is
connected at one end to a ‘Y’ piece on the reducer and
terminates at the other end with a QRC and protective cap.
The purpose of this hose is to provide the ability to either
supplement the wearer’s air supply with an airline or to
provide another wearer with additional air during exchange
of air procedure (see image 1136797).
LFB image 202449
Medium pressure
hose to in line
connection
Medium pressure
hose to second
person connection
High pressure
hose to EMU
LPWW
Cylinder
Connection
