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The internal flap on the valve case, in fact, takes advantage of the
temperatures generated by the diver exhaling and enables con-
siderable thermal exchange in the valve nozzle zone, where the
greatest risk of freezing exists. This patented system gives the
regulator considerably improved resistance to freezing features.
� WARNING: to deal with diving in cold water (temperature
<10°C or <50°F) Cressi-sub recommends using a tank
equipped with a pillar valve with two independent outlets, 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. Use of
diving equipment in cold water without certification or adequate
technical preparation is potentially dangerous for the diver's
health and wellbeing.
Furthermore, it is fundamental not to wet the regulator before use
and then expose it to air (which can be well below zero); do not
activate the purge button, especially with the Venturi effect regu-
lation lever in the “DIVE" position, and you are advised to keep, if
possible, the regulator in warm surroundings before using it.
The 2nd stage is connected to one of the 3/8” ports of the 1st
stage using a new flexible hose with medium pressure and a
large flow capacity in thermoplastic material with excellent me-
chanical qualities and high elastic flexibility with kinking impossi-
ble in any situation thanks to the internal structure of the material
with high capacity sections. These features, combined with the
particularly resistant aesthetics and pleasant graphics, where
the production batches per tube and fittings are marked ac-
cording to standard EN 250:2014, make it unique on the market.
All the Cressi-sub second stages are downstream, or rather, with
automatic valve opening in the event of 1st stage calibration loss or
a sudden increase in intermediate pressure due to a possible mal-
function of the valve.
This means that any excess pressure upstream of the 2nd stage
means spontaneous free flow of the regulator that never blocks
air flow. The Master 2nd stage case is manufactured in new en-
gineering plastic with excellent mechanical characteristics, which,
thanks to the particular technical features, also ensures noise is
considerably reduced.
The new cap, with an attractive and aggressive aesthetic, was
created with a special Titanium insert, material with unbeatable
lightness and resistance to corrosion. The new cover was de-
signed by computer, with an in-depth analysis of the water pas-
sages in the front of the case to optimise and further enhance
the already optimum 2nd stage performance.
The Cressi-sub Master second stage complies with Directive
89/686/EEC dated 21/12/1989, checked and certified by the Test
Authority No. 0474 RINA located in Genoa, tested in compliance
with standard EN 250:2014 that establishes the Personal protec-
tive Equipment (PPE) category III requirements and therefore out-
lines the CE marking followed by identification of the certification
authority (0474) pursuant to Art. 11A of the Directive 89/686/EEC.
Additional important information relating to our equipment can be
found on the site www.cressi.com.
SECOND STAGES
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