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Description
Explosion hazard from hybrid mixtures
Hybrid mixtures are mixtures of flammable dusts with explosive gas/air atmospheres which
can together create a dangerous explosive atmosphere if they occur at the same time.
Changes can arise in the safety characteristics here, such as a change in the zonal
classification, increase in the explosion pressure, reduction in the minimum ignition energy
and a reduction in the maximum temperatures to be observed.
An explosion can result. This can result in death, serious injury or material damage.
● For this reason, the relative characteristics must be considered both for gas (zones 0, 1
● Motors with dual plates for G ("Gas") andD ("Dust") may only be used where these two
NOTICE
Use of machines without CE marking
Machines without CE marking are intended for operation outside the European Economic
Area (EEA). Do not use any machines without a CE marking in the EEA!
The roller bearing machines with Ex d type of protection can have the following Ex marking:
Table 3-1
Marking for machines with type of protection Ex d for Zone 1
Directive
Directive 94/9/EC with EC
type-examination certificate
IECEx-Scheme with
Certificate of Conformity
22
DANGER
and 2) and for dust (zones 20, 21 and 22) where hybrid mixtures arise. It is necessary for
a competent assessor to determine in the individual case whether the parameters
determining ignition are unfavorably affected in a particular hybrid mixture.
simultaneously occur after the user has first analyzed the properties of the hybrid mixture.
II 2G Ex d IIC T3 to T6 Gb
0102
II 2G Ex d e IIC T3 to T6 Gb
0102
II 2G Ex d ib IIC T3 to T6 Gb
0102
II 2G Ex d e ib IIC T3 to T6 Gb
0102
Ex d IIC T3 to T6 Gb
Ex d e IIC T3 to T6 Gb
Ex d ib IIC T3 to T6 Gb
Ex d e ib IIC T3 to T6 Gb
Ex marking
II 2G Ex d IIB T3 to T6 Gb
0102
II 2G Ex d e IIB T3 to T6 Gb
0102
II 2G Ex d ib IIB T3 to T6 Gb
0102
II 2G Ex d e ib IIB T3 to T6 Gb
0102
or
Ex d IIB T3 to T6 Gb
Ex d e IIB T3 to T6 Gb
Ex d ib IIB T3 to T6 Gb
Ex d e ib IIB T3 to T6 Gb
LOHER CHEMSTAR 1PS5
Operating Instructions 03/2014
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