Publicité
Les langues disponibles
Les langues disponibles
When the diver exhales, the pressure inside the regulator case
increases and the exhaust valve opens (17). The AirTech exhaust
tee has been improved over previous exhaust tees to improve
its exhalation effort. The exhaust tee (9K) directs exhausted air
to the side of the divers head, protecting the valve against water
turbulence, which could open it while the valve body is not under
pressure.
The 2nd stage is connected to one of the 3/8" ports of the 1st
stage through a flexible intermediate pressure hose.
All Cressi-sub second-stage regulators feature a safety, down-
stream valve so that in case of sudden increase of intermediate
pressure, the second stage will automatically open, relieving
excessive over pressure. In the unlikely event of a first stage mal-
function, resulting in an over pressure situation, the second
stage will relieve excess pressure, allowing for the continued use
of the second stage.
Airtech CE case is manufactured with new, techno-polymer
materials featuring outstanding mechanical properties and an
attractive look. Additionally, the cover features a special light-
weight corrosion resistant titanium insert supported by locking
rings. CAD design and in-depth studies of water flow across the
regulator case have led to further optimization and enhance-
ment of the performance level of CRESSI-SUB regulators.
fig. 18
2.5 - XS2 2nd stage
The second stage supplies air on demand, namely only when the
diver inhales through the mouthpiece, thus generating a slight air
vacuum inside the regulator. This vacuum is minimum for effort-
less breathing, but enough to operate the diaphragm (19) which
is sucked inward, thus moving the center disk (coated with a spe-
cial antifriction material) into contact with the small lever (9). At this
point the lever is brought down and opens the air supply valve.
SECOND STAGES
43
fig. 19
fig. 20
Publicité
