Ocean Reef NEPTUNE SPACE PREDATOR Owner's Manual page 8

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the oral-nasal pocket, limiting the mixing of this air (containing high
amounts of CO2) with the fresh air from the regulator. The direction of
exhaled air is controlled by a four position exhaust valve. The adjustable
valve allows exhaust to flow in four directions:
when the diver is in a "head-down" position which, due to pressure on the
second stage, causes the regulator to free flow. Placing the exhaust valve in
the off position causes pressure to
build in the mask, preventing free flow and returning the system to an "air
on demand" situation.
SURFACE AIR VALVE
The PREDATOR is equipped with
allows the diver to breathe ambient air while at the surface. The surface air
valve is easily adjustable with large air vents and easy turning
DRAINING AND PRESSURE EQUALIZATION
Water that may seep into the mask is easily eliminated by exhaling or
pushing the "purge" button on the second stage. Mask squeeze, a common
problem for conventional masks, will not occur with the Neptune Space
because the pressure inside the mask is equal to the pressure outside the
mask.
THE 3-D EQUALIZATION SYSTEM
The patented Ocean REEF 3-D equalization system is designed to allow
equalization during a dive. The system consists of a movable plate and two
eccentric blocks; these blocks move close to the nostrils when the upper
part of the visor is pressed. The blocks plug the diver's nose allowing
equalization. Before donning the mask, the blocks may be moved up or
down depending on the length of the diver's nose. They may also be
adjusted to fit wide or narrow noses. The system also includes extenders
which allow the distance between the blocks and the nose to be modified to
accommodate the diver's face. The 3-D equalization system makes diving
more comfortable and inhibits any undesired pressure during a dive.
REGULATOR CHARACTERISTICS
The pneumatically balanced second stage provides consistent ease of breath
at any tank pressure. An inhalation adjustment feature allows the diver to
control air delivery under a variety of diving conditions. The Dive(+)/Pre-
dive(-) lever reduces free flow on the surface and provides maximum air
flow while at depth.
The purge button, made by premium grade silicone rubber, has a
Neptune Space Predator Manual rel 2.3 December 2008
A—to the left
B—to the right
C—both (direction of least resistance)
D—no exhaust
Position D, the "off" position is used
a newly designed surface air valve that