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Your OMEGA Seamaster Professional Diver is the watch for
professional and amateur divers, as well as demanding
sportsmen and –women. A robust design, the new helium
escape valve (exclusive OMEGA patent), together with
all the protection systems, offer optimal security and
reliability. In order to ensure that your watch remains
watertight, we recommend that you have it checked by
an authorised OMEGA partner every year.
Helium escape valve (fig. 1)
Why a helium escape valve? Air can-
not be used for deepsea dives, since
nitrogen (a constituent element of air)
becomes toxic at a depth of 60 metres.
Therefore, when carrying out work
at great depths, professional divers
stay in a diving bell for several days,
breathing a mixture of gases contain-
ing a high proportion of helium. The
pressure is gradually increased to
reach the pressure at the working depth. The divers, still
inside the bell, are then lowered to the working site. They
leave the bell to carry out their work.
Once their work is complete, they re-enter the bell,
which is then raised to the surface. Pressure is then
returned to atmospheric levels and this is when the valve
must be opened (only for deepsea dives lasting several
days).
The helium molecules diffuse and penetrate the material of
the gaskets. The quantity is sufficient to push out the crystal
during the return to atmospheric pressure
. To avoid this,
the Seamaster Professional Diver is equipped with a valve
specially developed by OMEGA.
Helium escape valve
fig. 1
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PROFESSIONAL
CHRONOMETER
300m/1000ft
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