Axair Fans UK Limited distributes ATEX Category 2 Zone 1 plate mounted and cased axial fans for the ventilation of buildings and rooms in which explosive gasses diluted in air may be present. All products are manufactured by Sodeca and are accredited by Notified Body LOM as satisfying the standards contained in ATEX Directive 94/9/CE.
Sodeca HCDF/ATEX and HDF/ATEX plate mounted fans are available in 11 basic impeller diameters, in two operating speeds according to model, and for both single and three phase electrical supplies. The maximum possible air flow rate is 48200m³/h. The motor has to be EEx d (explosion-proof) type meaning that a flame caused by an explosion within the motor cannot escape to the surrounding atmosphere
Sodeca HCT/ATEX is a cased axial range, the fans being contained within in a tube having flanges at each end. 10 basic sizes of impeller are available to provide air flow rates up to 72000m³/h. Non-sparking construction is achieved using cast aluminium impellers and an aluminium strip positioned within the steel casing.
Sodeca HCT/ATEX range electric motors may be selected as EEx e (increased safety), which is a reduced cost option of non-incendive construction, or EEx d (explosion proof) meaning that a flame caused by an explosion within the motor cannot escape to the surrounding atmosphere.
In general the fans comply with ATEX code Ex II 2G IIB T4, which is for surface industries (not mining). Installation is permitted in Category 2 Gas (Zone 1) areas where any Group IIA or IIB gas diluted in air may be present in normal operation. The maximum motor surface temperature T4 (135°C) will prevent spontaneous combustion of all but a small number of highly volatile gasses in T5 and T6 temperature class. The fans can be installed where an explosive atmosphere is likely to occur in normal operation occasionally.
Axial fans are designed to extract high air volume flow rates against relatively low pressure. Where the reverse is required i.e. relatively low flow rate against medium pressure, it is necessary to select centrifugal fans such as Axair SA and STA polypropylene models or from the Sodeca CMP, CMA, or CMR/ATEX metal fan ranges, also available from Axair.