TRIVAC B ATEX Categories 3 i and 3 i/o Vacuum Pump
Operating Instructions for Operation in Explosion Hazard Areas
The vacuum pumps from the line TRIVAC B Category 3 have been designed
and manufactured especially for the purpose of fulfilling the requirements of
Equipment Group II, Category 3 of the “ATEX Directive” (Directive 2014/34/
EU) for conforming utilisation of equipment and protection systems in explo-
sion hazard areas”.
Classification and Marking of the Pump
In the case of the standard TRIVAC B the inside, i.e. the process gas side of
the pump fulfils the basic safety requirements of the EU Directive 2014/34/
EU. The pump is supplied with an electric motor which is not ATEX certified
and has for this reason been marked as follows:
II (i) 3G IIC T4 (50 Hz) T3 (60 Hz) (12°C <Ta< 40°C) X
This pump is not suited for being installed in explosion hazard areas.
Pumps where the inside and the outside of the pump fulfil the basic safety
requirements of the Directive, are supplied with an ATEX certified motor and
have been marked as follows:
II (i) 3G IIC T4 (50 Hz) (12°C <Ta< 40°C) X
II (o) 3G IIC T3 (50 Hz) (12°C <Ta< 40°C) X
Explanation of the Symbols
II Equipment Group II applies to all equipment for use in areas which can be
endangered by an explosive atmosphere except in underground mining
operations and their related above ground systems which can be endan-
gered by mine gas and/or combustible dust.
(i)/(o) Specifies the category/conditions according to which the inside (i) (i.e.
sections of the equipment in contact with the process gas flow) and the
outside (o) of the equipment are classified provided these differ.
3 Category 3 comprises equipment which is designed such that it can be
operated in agreement with the characteristic quantities (operating parame-
ters) specified by the manufacturer and which ensure a normal level of pro-
tection. Equipment belonging to this category is intended for use in areas
where it needs not to be expected that an explosive atmosphere occurs
due to gases, vapours, mists or raised dust but, in case such an atmos-
phere should occur in spite of this then according to all probability only
rarely and briefly. Equipment belonging to this category ensures during nor-
mal operation the required degree of safety.
G For areas with an explosive atmosphere caused by gases, vapours or
mists in the air.
Category 3 inside
Category 3 inside 3 outside
ATEX
9GA01218_002_C1 - 07/2018 - © Leybold
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