Cressi MC7 Manuel D'instruction page 40

The 2nd stage is connected to one of the 3/8" LP outlets of the
1st stage through an intermediate pressure, high flow capacity
hose.
Cressi-sub Ellipse is a downstream regulator design.
This means that in the event of over-pressurization of the 1st
stage, excess air will be safely released through the 2nd stage.
Cressi-sub Ellipse complies with 89/686/CEE Directive of
21/12/1989, having been tested and certified by Genova-based
Test Board No. 0474 RINA, through tests complying with UNI EN
250:2000 standard which sets forth the requirements concern-
ing 3rd-class Individual Safety Devices (DPI), and consequently
bears the EC marking followed by the Certification Board identi-
fication (0474) in compliance with Art. 11B DE 89/686/CEE.
2.2 - Ellipse disassembly and maintenance
The Ellipse regulator has been designed to ensure easy and
quick servicing by authorized repair technicians.
WARNING: The 2nd stage must ONLY be opened, disas-
sembled and calibrated at Cressi-sub authorized centres and
the calibration values can NOT be and must NOT be changed
in order not to jeopardize the correct operation of the regula-
tor. Cressi-sub assumes no responsibility for any operation
carried out by personnel not authorized by Cressi-sub.
Using the same socket wrench supplied with the regulator to
disassemble the first stage HP and LP little plugs, you can open
and disassemble the 2nd stage, reaching directly its internal
mechanical components. This extraordinary characteristic,
which is unique in this field and patented, allows to open the tank
in a very easy and quick way in order to clean it, and to check for
the perfect operation of the various components.
fig. 10
In the different steps shown on the previous figures, the cap and
the middle compartment of the exhaust conveyor appear as
mechanically constrained to each other. The unusual (patented)
"cam-lock" locking system, allows to open and close the tank
very quickly, locking both the cap and the diaphragm with high
efficiency and accuracy.
Opening and closing a regulator has never been so easy, and so
safe, too!!!
In order to make test, overhaul and setup easier, all the mechan-
ical components of the second stage can be fully removed from
the tank in a few seconds, without changing its calibration. In this
way, during the periodic maintenance works, any worn part can
be disassembled and replaced after all the mechanical compo-
nents of the regulator have been removed, thus allowing
extraordinary easy operations.
To remove the mechanical components from the tank, as
shown on the following figure, just loose the lateral lock nut and
remove the two cone-shaped locking pins. The mechanical
components can then be removed as a whole, i.e. without hav-
ing to remove any single component, and especially without
changing the regulator calibration: a unique characteristic in this
field which provides numerous advantages.
SECOND STAGES
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