ATEX Retractor System TANKO-RT/-RTS
2 Safety
Translation - Operating/installation instructions 2020/01
27/121
The maximum surface temperature of the device is determined by the ambient temperature in the
system to be cleaned
(container) and the temperature of the cleaning medium. Operation generates
intrinsic heating of a maximum of 10 K, and the maximum surface temperature is thus obtained by
adding the higher value of the cleaning medium temperature or the ambient temperature in the system
(container) to be cleaned to 10 K.
The permitted temperatures must be taken into account (see
Section 3.3
NOTE ON EXPLOSION PROTECTION
According to EN 1127-1:2011, 6.4.2, the max. surface temperature in the container must
not exceed 80% of the ignition temperature of the explosive gas/air mixture or 2/3 of the
ignition temperature of the dust/air mixture (determined in accordance with the latest
version of EN 50281-2-1).
In addition, the smoldering temperature of the dust (ignition temperature of the dust layer
(determined in accordance with the latest version of EN 50281-2-1) must be at least 75 K
above the max. surface temperature. The thickness of the dust layer may reach a
maximum of 5 mm.
Where dust layers of > 5 mm are formed, the safety distance between the smoldering
temperature and the maximum surface temperature of the device must be increased.
In this context, the requirements in accordance with the latest version of EN 60079-14
must be observed.
For processes that follow cleaning, the potentially increased surface temperature of the
TANKO-RT/-RTS must be taken into account.
If necessary, the TANKO-RT/-RTS system must be left to cool down for sufficiently long for
a safe temperature to be reached.
Before the start of processes in which potentially explosive mixtures may develop, the device
and/or the ambient temperature in the
container must cool down to a safe temperature that no
longer poses an explosion hazard, see also the note on explosion protection above.
Possible hazards when spraying fluids must also be taken into account and considered in
a separate hazard assessment by the owner.