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Cressi MC7 Manuel D'instruction page 42

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To assemble the regulator, follow the disassembly steps in the
opposite order, just paying special attention when closing the
regulator. As you can see from the following pictures, once the
mechanical components have been fitted into the regulator, first
place the regulation diaphragm into its housing, then fit the cap,
made out of a special semirigid thermal rubber belonging to the
last generation of technical polymers, and finally close the regu-
lator making sure that the tooth in the cap bottom correctly
slides into the appropriate tank seat, as shown on figure B.
figure A
figure C
2.3 - Airtech Adjustable Balanced 2
figure B
The balanced second stage supplies air to the diver on demand.
As the diver inhales, a slight vacuum is generated in the second
stage causing the diaphragm (no.20) to come in contact with a
low friction demand lever disk, located on a demand lever (no.
16K). As the vacuum is increased, air flows from the air supply
orifice. Airtech CE 2
balanced poppet (11K) with a small hole across its longitudinal
axis (fig. 16). The air coming from the 1
small hole and reaches a small balancing chamber located at the
figure D
end of the poppet (11K). The air inside this chamber exerts pres-
sure (which varies with depth) on the poppet. The poppet is
pushed toward the orifice, closing it (4K) toward the air inlet from
the 1st stage. Since the forces acting on the orifices opening and
closing are balanced, a light rated spring (12) is used, which
allows for a smoother opening of the orifice. This results in an
almost effortless inhalation effort.
The air flowing through the orifice opens the seat, which is locat-
ed at the end of the poppet.(11K). This force is counteracted by
the sum of the spring and the air force. The air has now entered
SECOND STAGES
nd
Stage
nd
Stage features a unique, pneumatically
st
stage flows across this
41
fig. 15

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