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EXO Full Face Mask Manual
1.4.9 Equalizing Device, EXO Original only
If you are using heavy mitts it may be
difficult to grasp your nose for clearing
on the EXO Original.
To help eliminate this difficulty,
DSI offers a special nose clearing device
DSI Part# 325-635.
1.4.10 EXO Hard Shell
This hhard shell, DSI Part # 300-010, mounts
easily on all models of the EXO Mask. There are
reinforced areas for mounting lights or small
video cameras.
1.4.11 Air
Inlet Swivel
DSI Part # 305-036,
is supplied on all Original and Standard EXOs.
It allows the regulator hose to move freely and
align with the mask inlet without putting a stress
on the hose coupling. It uses standard SCUBA
threads for incoming breathing air. It may also
be used on second stage scuba regulators and the
EXO-BR.
8
1.4.12 Overpressure Relief Valve
The DSI Overpressure Relief Valve, DSI Part
# 200-017 is factory adjusted to vent any time
the pressure in the low pressure hose connect-
ing the bailout bottle to your emergency valve
exceeds 200 P.S.I. It is installed in any of the
low pressure ports in the first stage regulator.
WARNING: Be sure the bailout
regulator is fitted with a relief valve for
over-pressurization of the supply hose.
A leaky first stage can overpressure the
hose, bursting it. This would cause a
loss of the entire bailout supply and
possible physical injury to the diver as
the hose whips about. Do not use a high
pressure hose, as the system on the
mask is not designed for high pressure.
The DSI Overpressure relief valve has been
manufactured in two different flow rates. The
original valve had a lower flow rate that the
current valve. The current valve has been marked
in two ways, the first being a groove around the
flats of the hex. Currently the valve is marked with
a groove around the top of the body. These are the
same valve, just different marking methods.
Chapter 1
Document # 001026001
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