EBARA 3SF Manual De Instrucciones De Empleo Y Manutención página 7

of categories 1, 2, 3 respectively are suitable);
- Characteristics of the flammable substances
present in the form of gas, vapour and clouds;
- Temperature class: T1, T2, T3, T4, T5, T6 (defines
the gas ignition temperature).
5. PLATE DATA REGARDING
SAFETY
The standard plates give operational data, while
the supplementary plate gives information neces- sary for use in areas where the danger of explosion
exists.
5.1. DESCRIPTION OF THE SUPPLEMENTARY
PLATE (FIG. 1)
1) Pump model;
2) Serial number (the serial number identifies the
place of production, the date and the progres-
sive number);
3) Pump code;
4) Supplementary markings:
5.2. DESCRIPTION OF THE SUPPLEMENTARY
MARKINGS USED
Community marking regarding protection
against explosion (in accordance with DIN 40012
Appendix A).
II 2 G
pump for surface systems (group II) with
the presence of category 2 gases (G), steam or
clouds, suitable for area 1 and for additional emis-
sions into area 2.
ZONE 0
Area in which an explosive atmosphere, made up
of a mixture of gases or vapours, is present con-
stantly or for long periods.
ZONE 1
Area in which an explosive atmosphere of gas or
vapour can form in normal working conditions.
ZONE 2
Area in which an explosive atmosphere made up of
a mixture of gases or vapours would form with dif-
ficulty. Should such a mixture appear in this area,
however, it would last for a short period only.
In plants, the person in charge must define the
areas in which explosive atmospheres can form, or
select apparatuses that are suitable for the areas
and check the installation, maintenance and ope-
ration conditions;
EEx
symbol which refers to pumps designed
and produced in accordance with European norm
standards;
c k b
these letters specify the type of protec-
tion;
In particular
c –
production safety.
k –
protection by immersion into liquid (the igni-
tion sources are emerged into a protective
liquid in order to render them inefficient or re-
move them from the explosive atmosphere).
b –
protection by ignition source control.
IIC
substance group;
T2 to T4 resp.
Pump temperatures classifi-
cation (the maximum temperature of the internal
and external surface of the pump must be lower
than the ignition temperature of the atmosphere in
which the gases, vapours or clouds are present)
suitable for the corresponding gas temperature
classification. The user must therefore process flu-
ids at a temperature that is in conformity with this
classification, keeping in mind the indications given
in the relative manual and by current legislations;
8000319205
registration number of the techni-
cal document storage area.
5.3. NOTES
- The pumps in category 2G are suitable for areas
1 and 2;
- Pumps with a given temperature class are also
suitable for all higher class substances (for exam-
ple pumps with a temperature classification of T4
are also suitable for substances with T3, T2, T1
temperature classification) but evidently within
3SF-3LSF-3PF-3LPF – 7