Use of the T10 balanced diaphragm first stage is advised, com-
pared to the piston models, for diving in waters full of suspended
particles or dissolved mineral salts, or for use in cold water (with
temperatures under 10°C), because all parts of the regulator
mechanism are insulated for contact with water.
For diving in extreme conditions we recommend using combina-
tions with the T10SC or the T10 Cromo SC versions equipped with
the Seal Chamber (S.C.)
WARNING: to deal with diving in cold water (temperature
<10°C or < 50°F) Cressi-sub recommends use of a tank
equipped with a pillar valve with two independent ports outlet,
where two complete regulators can be connected.
WARNING: adequate technical preparation is necessary to
deal with diving in cold water (temperature <10°C or < 50°F ).
Cressi-sub recommends you carry out this type of diving after
taking a specific course given by qualified instructors. It is im-
portant not to wet the regulator before use and then expose it
to air (which can be well under zero degrees). Do not use the
purge button, particularly with the regulator level with Venturi
effect in the “dive” position. If possible, keep the regulator in
warm surroundings when not in use.
The Seal Chamber is used to make the T10 balanced diaphragm
first stage completely waterproof, avoiding water entry not only
inside, but also in contact with the diaphragm and the calibration
spring on the 1st stage, thereby creating an air chamber up-
stream of the regulator and its components, working like a proper
thermal barrier. All problems are therefore avoided relating to
contact with water full of suspended particles, sand, dissolved
mineral salts and with cold water which, especially at tempera-
tures below 10°C could form the foundation for possible freezing
of the regulator.
The Seal Chamber (fig.2) consists of a special metal insert with a
particular “radiator” shape designed to increase thermal ex-
change between the ambient temperature and the temperature
inside the regulator, preventing its possible freezing effect, and a
metal cap containing a silicone membrane inside. This, on warn-
ing of the ambient pressure variations, inverts and thereby trans-
mits oscillations to the ambient pressure transducer beneath
which, coming in contact with the main diaphragm, acts as a
transmission element which transfers all information on the ex-
treme pressure variations to the diaphragm. The main diaphragm
which, in turn, protects and seals the mechanism inside the sys-
tem, then transmits the pressure variations of the water to the
high pressure valve.
NOTE: before assembling the Seal Chamber S.C. the
balanced diaphragm first stage must be calibrated. To ensure
the regulator works properly, strictly comply with the calibration
values outlined in the regulator performance table. Regulator
calibration is not restricted by the ambient pressure variations
transmission disk.
fig. 2
50
FIRST STAGES
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