Seac Sub N-Synchro Instructions page 15

The asymmetric form of the flow lever (Fig. 1)
allows a longer course, therefore increasing the
performance in air flow.
Each metal component is perfectly chrome-
plated and polished in order to reduce friction
and, consequentially, reduce inhalation effort.
The concave outer air conveyor, commonly
known as the deflector, allows the diver to rest
his chin (Fig. 2), a divisor inside (Fig. 2b) protects
the dump valve from the risk of uncontrolled
opening in case of diving in the presence of
strong currents.
The larger oval-shaped dump valve (Fig. 3) al-
lows a sudden dumping of air, reducing the
breathing effort to a minimum.
The new anatomically shaped mouthpiece
(Fig. 4) fits comfortably into the mouth while
adapting to any shape; this excellent result was
obtained thanks to research carried out in den-
FIG. 1
FIG. 2
tistry and to the tests carried out on samples
given by hundreds of divers.
The particular grip allows the mouthpiece to
remain fixed in the mouth even in the presence
of strong currents. The correct hardness of the
silicon gives the mouthpiece a considerable
life span while maintaining its softness and
anatomic fit.
An inner locknut blocks the membrane (Fig. 5)
and fixes it solidly to the casing, increasing
safety and functionality. This component elimi-
nates the risk of losing the membrane in the
case the external cap should unexpectedly
become loose.
The external cap (Fig. 6) is made of rubber that
is highly resistant to sunlight and saline corro-
sion. Its special shape makes it easy to find the
centre, therefore facilitating the manual regu-
lation of the pressure.
The membrane is made in transparent, elastic
silicon while the central disk is made from ac-
etate resin to eliminate any friction in order to
further facilitate inhalation.
The casing is produced from synthetic resin,
particularly resistant to impact, abrasion, ultra-
violet rays, and external chemical agents. The
o-rings are in nitrile rubber subdivided into
different degrees of hardness (shore) according
to their applications. The internal components
are made from chrome-plated brass and stain-
less steel.
The operation is of the "Downstream" type.
This system allows for low air consumption by
reducing air waste, as it perfectly meets the
breathing demand.
FIG. 2b
13 13