12
Chapter 2
EXO Full Face Mask Manual
Document # 0010
2
6001
WARNING: The EXO Mask is not
equipped with a one way valve (non-re-
turn valve) as supplied from the factory.
For safe surface supplied diving, the
diver must use a manifold block
equipped with a one way valve.
DO NOT
CONNECT THE DIVER'S UMBILICAL DI-
RECTLY TO THE EXO WITHOUT A ONE
WAY VALVE.
The one way valve is a very important compo-
nent. It prevents the flow of air out of the mask
in the event of a sudden lowering of pressure in
the umbilical supply hose due to an accidental
break in the hose or fitting.
Not only would the
emergency air be lost if the one way valve
failed (concurrent with a hose or fitting
break) but the diver could be “squeezed”, a
very serious accident. DO NOT DIVE SUR-
FACE SUPPLIED WITHOUT A ONE WAY
VALVE!
At a minimum, if the EXO is to be used for sur-
face supplied diving the following systems and
components must be in place and in proper work-
ing condition.
1) Air Supply:
Either a low pressure compres-
sor or high pressure air bottles.
2) Dive Control System:
An air management
box to control the flow of air delivered to the
diver or divers (like the DCS 2A or DCS 3 of-
fered by DSI).
3) Divers Umbilical:
Hose bundle consisting
of air supply hose, pneumofathometer hose
(depth sensing), communications wire and rope
as a strength member.
4) Divers Manifold Block:
A metal block that
has a one way valve that the umbilical attaches
to, an emergency valve that the bail out system
attaches to and L.P. ports for attaching the mask
hose, dry suit inflators and other accessories.
5) Bailout System:
Consisting of a harness, bail
out bottle, first stage regulator with over pres-
sure relief valve. This system connects to the
emergency valve on the divers manifold block
assembly by a hose.
6) Communications System:
Provides hard
wire communication between diver and top side.
2.10 TESTING THE MANIFOLD BLOCK
Prior to assembling a bailout system, the one
way valve and emergency valve should be tested
for proper function.
Equipment Needed:
-Manifold Block
-Bailout bottle
-1st Stage regulator w/octopus and scuba reg
hose attached
-DCS system with an umbilical supply hose
-Bucket of water
The EX0-26 is part of a complete surface
supplied diving system.
