Seac Sub Diamond Ice Instructions page 18

DIAMOND /DIAMOND ICE REGULATORS
SECOND STAGE
Second stage with air balancing system which
reduces the initial breathing effort while pro-
viding a linear and constantly smooth breath-
ing. The system operation is based on a pneu-
matic piston working in close contact with the
spring, enabling the latter to work with a
lower load force (consequent light breathing)
ensuring a perfect seal of the air flow during
the breathing out phase.
By actuating the knob located on the left of the
regulator (see Figure A-B) you can regulate the
breathing softness according to your breathing
demand and to the diving conditions.
By rotating it anticlockwise you will get the
maximum breathing softness and by rotating
it clockwise you will gradually reach a stan-
dard breathing flow. This second stage conse-
quently allows individualizing the breathing
demand as a function of the dive require-
ments and type.
A
MANOPOLINA SVITATA
(SENSO ANTIORARIO)
RIDUZIONE SFORZO
INSPIRATORIO
Figure A-B
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.
This means that the air flow delivery is per-
fectly controlled by the diver's breathing ac-
tion: a normal breathing action produces a
light air flow, while heavy breathing due to
fatigue or deep diving produces a free air
flow, also increased by the Venturi effect.
In addition, this system also provides safety
margins in case of first stage overpressure:
should the intermediate pressure supplied by
the first stage suddenly increase, the second
stage would continue to work, thus releasing
18
B
MANOPOLINA AVVITATA
(SENSO ORARIO)
SFORZO INSPIRATORIO
NORMALE
excess pressure and enabling the diver to
breathe.
The control of the DIVE and PRE-DIVE mecha-
nism allows to insert the Venturi effect. This
system is placed around the knob regulating
the breathing effort reduction system.
By actuating this mechanism placed to the
left of the second stage you can insert the
Venturi effect and consequently increase air
delivery.
By turning the lever towards the outside you
reach the "PRE-DIVE" position, while by turn-
ing the lever towards the diver you reach the
"DIVE" position. (see Figure C)
The "PRE-DIVE" position is recommended to
prevent accidental delivery when the regula-
tor is under pressure but not used, while the
"DIVE" position is recommended during the
dive.
Warning! Move the lever to "PRE-DIVE" only
when the regulator is not used, and rotate it
to "DIVE" before dive start.
DIVE
Figure C
The main body is made of synthetic resin,
which is highly resistant to impacts, abrasions,
ultraviolet rays and chemical agents. Di-
aphragms are made of medical grade silicone,
while nitrile rubber O-rings are of different
hardness (Shore) as a function of their appli-
cations. Chrome-plated brass and stainless
steel internal components. Black anallergic
silicone mouthpiece.
The nut placed on the hose end was especial-
ly designed with slightly marked lines for cos-
metic purposes, so as to give the Diamond
regulator a professional and captivating look.
The hose is of the standard type (770 mm
length and 3/8" thread).
Pos. – Pre Dive
+ Dive
PRE-DIVE