ATEX certification

The compressed air stirrers from Buddeberg GmbH are explosion-protected according to the current ATEX regulation 2014/34/EU and are assigned to equipment group II, zone 1 and 2 for gas atmosphere G and/or can be offered for dust atmosphere D too.
Compressed air stirrers of equipment group II include the explosion subgroups IIA, IIB and IIC, and can thus be used for mixing work in these areas.

According to the type, compressed air stirrers are classified in temperature class T4 (max. 135°C) or T5 (max. 100°C). The temperature classes designate the maximum permitted surface temperature of the used appliances in order to avoid ignition by high surface temperatures. The specified temperature class does also include applications for lower T classes (e.g. T5 stirrers are suitable to be used for T1 to T4 too).

Permitted ambient temperature in a potentially explosive atmosphere is -20°C to +40°C.


Marking Description Definition
II Equipment Group II Equipment for use in potentially explosive atmosphere containing gases, vapours, mists or dusts
2 Equipment category 2 High level of protection
G For gas atmospheres A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is likely to occur in normal operation occasionally
D For dust atmospheres A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is likely to occur in normal operation occasionally
c / Ex h Constructive safety “c” Ignition protection type for non-electrical equipment
IIC Explosion group for gas mixtures Classification of ignitability of mixtures ranking from A (low) to C (high)
T5 Maximum surface temperature 100°C Applicable for mixtures with an ignition temperature of > 100°C to ≤ 135°C
Gb Equipment Protection Level (EPL) Marking for category 2G