The company reserves the right to vary models and dimensions without notice.
These products are designed for industrial applications and are not suitable for sale to the general public.
SEAL KITS & TECHNICAL DATA
Seal Kits & Technical Data
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NORTH AMERICAN CYLINDER & ACTUATOR CATALOG
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Release 8.5
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substances and an ignition source
in a potentially explosive atmosphere.
An ignition source could be:
•
Electrical (electric arcs, induced
current, heat generated by the Joule
effect)
•
Mechanical (heat between surfaces
caused by friction, sparks generated
by the collision of metallic bodies,
electrostatic discharges, adiabatic
compression)
•
Chemical (exothermic reactions
between materials)
•
Naked flames.
The products which are subject
to the approval are those which,
during their normal use or because
of a malfunction, present one or more
ignition sources for the potentially
explosive atmospheres.
The producer has to guarantee that the
product conforms with the declarations
and to the marking of the product.
Moreover the product should always
be accompanied by the relative
instructions. The builder of the
equipment and/or user should identify
the risk zone in which the products,
to which directive 99/92/CE refers,
These are the main changes
introduced by the new directive
94/9/
CE:
•
Also non-electric apparatus
and devices, as pneumatic cylinders,
are part of the Directive
•
The apparatus are assigned to
different categories which are assigned
to certain potentially explosive zones.
•
The products are identified with
the CE mark Ex.
•
The instructions for use and
the declarations of conformity should
in order to be supplied with each
sold product used in potentially
explosive zones.
•
Products destined to be used in
potentially explosive zones, because
of the presence of dust, are included
in the directive like the products
destined to be used in zones with
the presence of dangerous gases.
A potentially explosive atmosphere
could be composed of gas, mist,
steam or dust which can be created
in manufacturing processes or in all
those areas in
which there is a constant or random
presence of inflammable substances.
An explosion can occur when there
is an existing presence of inflammable
are used and purchase the product
according to the use in the pre-
determined zone paying attention
to the specifications in the relative
instructions.
In case a product is composed by
two components with different
markings, the component which is
classified in the lowest category
defines the class to which the
complete product belongs.
Example:
solenoid suitable for Category 3
marked …
Ex - II 3 EEx…
and valve suitable for Category 2 …
Ex - II 2 EEx…
The valve unit with solenoid can be
used only in category 3 or zone 2/22.
Products classified for the use in potentially
esplosive atmospheres (Directive Atex 94/9/CE)
Group I:
Apparatus for mines
CATEGORY M1
Functioning in explosive atmosphere
CATEGORY M2
Non-supplied equipment in explosive atmospheres
Group II:
Apparatus for industries above the ground
Product category
GAS
DUST
1
Zone 0
Zone 20
2
Zone 1
Zone 21
3
Zone 2
Zone 22
Zones, groups and categories
In the places and for the types of equipment subject to Directive 99/92/CE, the employer should execute
the classification of the zones regarding the danger of the creation of explosive atmospheres because of the presence of gas or dust.
The apparatus for the use in potentially explosive zones are divided in GROUPS:
GROUP I: apparatus used in mines
GROUP II: apparatus used in installations above the ground.
As from the first of July 2003, all products which are commercialised in the European Union and destined to be used
in
potentially explosive atmospheres
,
have to be approved according to the directive 94/9/CE, also known as ATEX.
This new directive also refers to non-electric items, like pneumatic drives, which need to be approved.
»
The European certification
for products destined
to be used in potentially
explosive zones.
94/9/
CE
ATEX
