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17
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.
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
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.
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).
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This first stage combines very high performance
with an extremely compact and round shape.
Operation is ensured by a balanced di-
aphragm system which keeps a constant in-
termediate pressure with reference to both
tank pressure and depth. In addition, the di-
aphragm completely separates the regulator
core from the external environment, ensuring
total reliability over a long series of dives.
It is cast as a single block of copper-plated
brass, subsequently nickel- and chrome-plat-
ed. Internal components are in chrome-plated
brass with music-wire springs and nitrile-rub-
ber seals. Particular care was given to the sep-
arating diaphragm, made of a special rubber
which remains unchanged and is resistant to
low temperatures.
Four low-pressure ports, provided with 3/8”
thread, supply a constant pressure of 9.8 bars;
all ports are considered preferential, as they
are implemented on the same axis; in addi-
tion, two of them are positioned at 30° with
regard to the first stage body, so as to make
the correct bending of the valves inserted
easier; the most important components, such
as the main regulator (on the right) and the
jacket or dry diving suit hose (on the left),
shall be connected to these two ports.
In decentralized position there are two high-
pressure ports (one to the right and the other
to the left) with 7/16” thread and inner hole
having a 0.20 mm. diameter; a diving pres-
sure-gauge may be connected to these high-
pressure ports, to check the internal pressure
of the cylinder used, by means of a hose with
7/16” thread male connection.
Warning!
Use only CE certified pressure gauges provid-
ed with standard thread. Do not use any type
of adapter between the first stage and the
high pressure hose connection.
The DIAMOND first stage has been designed
to operate with cylinder working pressures up
to 300 bar. For pressure exceeding 230 bar it
is advisable to use the version provided with
the 300 bar thread connection (THREAD CON-
NECTION ISO 12209-2/3.2; 300 BAR) imple-
mented in our model DIAMOND ICE
The DIAMOND first stage is implemented in
the following versions:
International YOKE connection
(ISO 12209-1 230 BAR)
THREAD connection
(ISO 12209-2/3.5; 230 BAR)
DIAMOND ICE REGULATOR
FIRST STAGE
First stage has the same characteristics as the
DIAMOND version, but with the addition of
the innovative ANTIFREEZE DRY SYSTEM.
This system enables diving under extreme
temperature conditions, while keeping oper-
ating characteristics unchanged.
An antifreeze silicone separating diaphragm,
placed at the end of the first stage insulates
the regulator mechanics from the outside,
while transmitting through a simple and
functional mechanism, the water external
pressure needed for proper and constant bal-
ancing of the first stage under any pressure
and diving conditions.
This version is recommended for dives in cold
waters or mountain lakes where the water
may reach temperatures nearing zero.
The DIAMOND ICE version First stage is imple-
mented in the following versions:
International Yoke connection
(ISO 12209-1 230 BAR)
Thread connection
(ISO 12209-2/3.5; 230 BAR)
Thread connection
(ISO 12209-2/3.2; 300 BAR)
Warning!
To use the YOKE connection (ISO 12209-1 230
bar) or the THREAD connection (ISO 12209-
2/3.5; 230 bar), you must use a cylinder having
valves fitted with the relevant connections.
We recommend you to keep a common 8 mm
Allen wrench within reach, so that you may
operate on the valves, if needed, to obtain
the right connection. Please note that (the
300 bar THREAD connection) (ISO 12209-
2/3.2; 300 bar), only valves with the relevant
connection should be used.
EROGATORI DIAMOND, DIAMOND ICE, DIAMOND OCTO.
DIAMOND REGULATOR - FIRST STAGE
Figure A-B Figure C
DIVE PRE-DIVE
A
MANOPOLINA SVITATA
(SENSO ANTIORARIO)
RIDUZIONE SFORZO
INSPIRATORIO
B
MANOPOLINA AVVITATA
(SENSO ORARIO)
SFORZO INSPIRATORIO
NORMALE
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