HELIOTHERME 4000® Axial air heaters HELIOTHERME ...… is also the solution for ATEX compliance® Ex II 2 G II c 65 °C - 105 °C or 120 to 220 °C EEx d/de IIB or IIC T4 to T6 CIAThas put all its expertise and know-how into a special series of ATEX certified HELIOTHERME units.® This approval, issued by an independent external body, is your guarantee of complete compliance with the ATEX directives. TheATEX HELIOTHERME range is certified for your applications:® ■ In the presence of explosive gas agent ■ In zone 1 or 2 ■ For IIB or IIC explosion groups ■ With T4 to T6 gas auto-ignition temperatures ■ Low pressure water, superheated water, steam, oil, compressedair, etc. What is ATEX? An ATEX (explosive atmosphere) can be caused in atmospheric conditions by flammable gases, vapours or mists or by combustible dusts mixed with air. After ignition, combustion spreads through the whole of the unburnt mixture. How is an ATEX zone defined? ATEX zones are determined based on the probability and duration of the occurrence of an explosive atmosphere. This risk analysis is used to define zones, explosion groups and maximum surface temperature classes. These atmospheres are mainly found in painting workshops, metal processing workshops, waste recycling, wood processing, etc. Who defines ATEX zones? Any operator of a production facility where an explosive atmosphere may occur must define the relevant ATEX zones, explosion groups and temperature classes. By doing so, the operator will also be able to set up the necessary means of prevention (communication, documentation, recommendations, etc.). "Directive 94/9/EC divides the equipment and protective systems which it covers into equipment groups and categories; this Directive (1999/92/EC) provides for a classification by the employer of the places where explosive atmospheres may occur in terms of zones and determines which equipment and protective systems groups and categories should be used in each zone." ZONE Gas (G) Dust (D) Category The explosive agent is: 0 20 0 Occurs continuously, often and over extended periods: NOT APPLICABLE TO ANY CIAT PRODUCTS 1 21 1 Occasionally present during normal use (on request) 2 22 2 Rarely or briefly present GAS - EXPLOSION GROUP AND TEMPERATURE CLASS Temperature class T1 T2 T3 T4 T5 T6 Max surface temp 450 °C 300 °C 200 °C 135 °C 100 °C 85 °C Explosion group Acetone Ammonia Benzene Acetic acid Petrol Ethane i-Amyl acetate Diesel IIA Ethyl acetate Butane Hot oil Acetaldehyde Ethyl chloride Butyl alcohol Methanol Hexane Naphthalene Phenol Propane II B Town gas Ethylene Hydrogen sulphide Ethyl ether II C Hydrogen Acetylene Carbon disulphide CATALOGUE 2021 195 195