Pompa ad ingranaggi - Serie GS, GK
Gear pump - GS, GK Series
64
Supplementary instructions for operation and maintenance of pumps and pumping sets
which work in potentially explosive atmospheres (Directive 2014/34/EU)
Directive 2014/34/EU (that replaces Directive 94/9/EC, also known as ATEX) concerns “equipment and protec-
tive systems intended for use in potentially explosive atmospheres”.
Equipment ad units intended for use in potentially explosive atmospheres are classified in groups and catego-
ries on the basis of the degree of safety they offer, so to their suitability to operate in locations with different
classifications:
Group I
(mines and related surface
plants exposed to risk of release
of firedamp and/or combustible
dust)
Group II
(other locations with potentially esplosive atmospheres)
Category M1
(very high
protection
level)
Category M2
(high protec-
tion level)
Category 1
(very high protection
level)
Category 2
(high protection
level)
Category 3
(normal protection level)
G
(gas)
D
(dust)
G
(gas)
D
(dust)
G
(gas)
D
(dust)
Zone 0
Zone 20
Zone 1
Zone 21
Zone 2
Zone 22
environments where
explosive atmospheres
are detected for long
periods of time
environments
where explosive
atmospheres are
probably detected
environments where ex-
plosive atmospheres are
rarely detected and, how-
ever, for short periods of
time
For each zone, there are 6 classes of temperature, which have been stated depending on the minimum ignition
temperature of the explosive mixture:
Temperature class
Max surface temperature
T1
T2
T3
T4
T5
T6
450 °C
300 °C
200 °C
135 °C
100 °C
85 °C
At the order, the Customer must define:
-
working conditions of the pump (capacity, head, NPSH, local temperature, etc.);
-
chemical and physical characteristics of fluid to be pumped;
-
classification of dangerous area;
-
temperature class.
Pumps cannot operate with working conditions different from the ones defined in the order, unless not ex-
pressly authorized and written by the Manufacturer.
Summary of Contents for GS Series
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