Cressi MC7 Manuel D'instruction page 33

32 FIRST STAGES
previous versions), and all arranged to allow easy connection of
all accessories. Intermediate pressure ports have been made
larger in order to limit any pressure loss during regulator operation
and ensure an adequate airflow under every condition of use.
The intermediate pressure adjustment system (a unique fea-
ture of all Cressi-Sub regulators) has also been upgraded.
WARNING: The intermediate pressure adjustments
should only be made by certified technicians or by Cressi-sub
authorized centers. Changing pre-set values can affect the
proper function of the regulator.
Another very important feature of this regulator concerns main-
tenance, which is particularly easy and quick to perform due to
its advanced design.
Two high-pressure (HP) 7/16" ports are located on the main reg-
ulator body with 0.2 mm controlled air vent. In the event of acci-
dental damage to the high-pressure hose, the flow of air from
the tanks is controlled against rapid air depletion.
Fig. 3
WARNING: It is necessary to connect either a pressure
gauge or a pressure-measuring computer to the 1st Stage HP
port. Since cylinders do not feature a reserve device, an
underwater pressure gauge must to be connected to the
regulator 1st Stage in order to monitor air consumption.
Without a pressure gauge you cannot monitor air consump-
tion, and should you suddenly run out of air while diving, you
can put your life at risk.
The main regulator body features a number of technical innova-
tions of this balanced piston 1
er (17K) for the O-Ring inside the regulator case has been
added. This new feature has been designed to further improve
the regulator performance.
Special care was given to materials used and to the design of
each component, aimed at preventing oxidation. For example, a
spring protection capsule (no. 12) has been added to avoid any
spring-poppet contact. A new screw, locking the revolving turret
(no. 9) has been designed with a larger airflow cross-section,
and a lower head profile to minimize galvanic oxidation.
st
stage: an extrusion-proof retain-
fig. 4