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2.2 SAFETY RULES FOR POTENTIALLY EXPLOSIVE ATMOSPHERES
In addition to the general rules set out in section 2.1 “GENERAL SAFETY RULES”,
the coupling installation in a zone with hazardous atmosphere shall comply with
the following supplementary requirements:
2.2.1
The ATEX hydromechanic coupling are manufactured in different protection
classes, which are characterised by a suitable marking on the identification plate.
Do not use couplings without ATEX marking or whose protection category
is unsuitable and/or lower than the category required for the location,
where they are used. FIRE DANGER.
2.2.2
The hydromechanic coupling equipotential protection is implemented through the
metal bonding of the mechanic connection with the drive end shaft and the driven
end, by checking the resistance and the dispersion values of the installed coupling.
Do not connect the fluid coupling with elements, which generate bad
conductivity with both the driving and the driven end (e.g. paints, oxide).
DANGER OF LOSS OF EQUIPOTENTIAL INSULATION AND/OR IGNITION.
2.2.3
The ATEX hydromechanic coupling must be used with suitable transmission oils
and selected among different temperature classes (T3, T4, T5 and T6).
Do not use the coupling in a hazardous environment with unsuitable oil or
oil, whose temperature class is inadequate or not in compliance with both
the coupling manufacture and the environment classification.
FIRE DANGER.
2.2.4
Do not expose the external surfaces of the hydromechanic coupling to hot air
streams and/or sources or accumulators of electrostatic currents (synthetic or
plastic material, etc.).
IGNITION AND FIRE DANGER.
2.2.5
To clean the surfaces of the hydromechanic coupling, use disposable cellulose
cloths dampened with neutral detergent.
Do not use inflammable solvents or agents or dry synthetic cloths, which
may become electrostatically charged. IGNITION AND FIRE DANGER.
2.2.6
Service and repair operations may only be carried out by trained and skilled
technicians, who qualify for work in locations with hazardous atmospheres. The
maintenance and repair work carried out, must be entered in a proper book (see
section 7.5 INTERVENTION RECORD).
FIRE DANGER.
2.2.7
The worn parts or triggered protections of the ATEX couplings must be exclusively
replaced by original spare parts.
FAILING TO OBSERVE WHAT ABOVE MAY RESULT IN DANGER FOR THE
OPERATORS, TECHNICIANS, PEOPLE OR THE MACHINE, WHERE THE
COUPLING IS MOUNTED, WHICH THE MANUFACTURER MAY NOT BE HELD
LIABLE FOR.
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