Walvoil DPC130X Service Manual page 6

DPC130X
Valve desctription
ATEX Directive 2014/34/UE
The ATEX Directive 2014/34/UE is applied, with the aim to reduce the risk of use, to the manufacture specifications of all
those products to be used in potentially explosive atmosphere due to the presence of dust or gas. According to this directive
an explosive atmosphere is made up from a mixture of inflammable substances (like gas, vapours, mists and dust) with air in
determined atmospheric conditions in which, after triggering, the combustion propagates together with unburned substances.
An atmosphere that could become an explosive atmosphere because of local and/or operative conditions is defined a potentially
explosive atmosphere.
In order to define an adequate conformity evaluation procedure, depending on the purpose stated, the manufacterer must
establish the product functioning conditions (e.g. for the working area, the type of the possible explosive mixture and the risk
level of an explosive atmosphere), then to which Group the product belong and determine the category inside the Group.
Areas
With the Atex Directive 2014/34/UE (for the safety of workers) please
find the working conditions for products in compliance with Atex Direc-
tive 2014/34/UE. These are expressed in Areas and defined according
to the potential explosive atmosphere, respectively for every type of
atmosphere (gas-air mix or dust-air mix).
Area 0 and 20
Where an explosive atmosphere is constantly present or present for
long periods or frequently.
Area 1 and 21
Where an explosive atmosphere is probable. It occurs in normal fun-
ctioning and exercise conditions.
Area 2 and 22
Where an explosive atmosphere is scarcely possible or, if it occurs, it
lasts only for a brief period of time.
6
________________________________________________________________________________________
Gas-Air-type explosive
mixture (G)
The products due to work in en-
vironments characterized by this
type of explosive atmosphere will
be respectively indicated for Area
0, 1 or 2 depending on the Group
and category of origin (see below)
and they are marked with the let-
ter G.
Service Manual
Dust-Air-type explosive
mixture (D)
The products due to work in en-
vironments characterized by this
type of explosive atmosphere will
be respectively indicated for Area
20, 21 or 22 depending on the
Group and category of origin (see
below) and they are marked with
the letter D.
D1WWTD02E