ATEX fans. experience since 1985. Hoffmann La Roche (Basle, CH) transport of explosive, toxic and corrosive gases 2000 m³/h 70 mbar T° : - 50°C … + 200°C system pressure 8 bar 12 bar explosion resistance. 1985 biogas. Hofstetter (CH) transport of biogas (methane)
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Hoffmann La Roche (Basle, CH)
Hoffmann La Roche (Basle,CH)
ER IIB3/100/520 zweistufig
ER IIA/100/520 zweistufig
In January 1999 a project had been set up to extend the range of zone-0 fans and to receive the ATEX certificate
in March 1999 the order of Sanofi Synthélabo (France) for 6 fans intensified our efforts
the required new size had been incorporated into our project
we took the necessary steps to receive the ATEX certificate
Sanofi Synthélabo (F)
99/92/EC (ATEX 137) is intended to complement the previously published 94/9/EC (ATEX 100a). These two directives cover different areas and are intended to achieve different objectives. Responsibilities and duties are shared between the manufacturer and user (employer).1999/92/EC (ATEX 137)
1994/9/EC (ATEX 100a)
Both ATEX 137 and ATEX 100a became mandatory on 1st July 2003. and set out the minimum requirements. Member states are free to introduce more stringent measures if they wish.
After 30 June 2003 products may be placed on the market in the EU territory, freely moved and operated as designed and intended in the expected environment only if they comply with directive 94/9/EC.
Directive 94/9/EC provides Essential Health and Safety Requirements (EHSRs, listed at Annex II) for
Group I comprises equipment intended for use in the underground parts of mines, and to those parts of surface installations of such mines, likely to become endangered by firedamp and/or combustible dust
Group II comprises equipment intended for use in other places likely to become endangered by explosive atmospheres
Our range of product come normally in application covered with this group, sub-divided into 6 categories
Cat. 1G comprises products designed to be capable of remaining in areas in which explosive atmospheres caused by mixtures of air and gases, vapours, mists or air/dusts mixtures are highly likely to occur and are present continuously, for long periods of time or frequently
Equipment of this Category is characterised by integrated explosion protection measures functioning in such a way that:
Cat. 2G comprises products designed to be capable of remaining in areas in which explosive atmospheres caused by mixtures of air and gases, vapours, mists or air/dust mixtures are likely to occur
The explosion protection relating to this Category must function in such a way as to provide a sufficient level of safety even in the event of equipment with operating faults or in dangerous operating conditions which normally have to be taken into account.
Cat.3G comprises products designed to be capable of remaining in areas in which explosive atmospheres caused by mixtures of air and gases, vapours, mists or air/dust mixtures are less likely to occur and if they do occur, do so infrequently and for a short period of time only.
The design of the products of this category must provide a sufficient level of safety during normal operation.
designed without specific measurements
cat.1 = (permanently explosive medium) requires additional measurements.
Up to today all solutions are limited to gas (cat.1G), since dust (cat.1D) cannot pass the flame arresters.
protection measurements must guarantee
explosion resistant design + flame arresters
design ER + flame arresters close to the fan
proof by real explosion tests
each new type has been proofed (16x) with the fan by real explosion tests (according to EN 12874) to demonstrate the efficacy of the safety measurements
Sensors measure the temperature at the inlet flame arresters to detect a fire and at the same time they indicate an abnormal temperature of the medium.
Fans for category 1G are always designed for specificoperating conditions, which are given by
under no circumstances the fan can be used outside the range of these specifications !
Certification from QS
according to ATEX
technical documentation to
controlled production , quality system
conditions for use
0080 : number of the ‚Notified Body‘ who checked the quality system (Ineris for us)
1G : inside category 1 for gas
/ 2G : outside category 2 for gas
IIA : explosion group of the transported gases
T4 : maximal temperature of surfaces
4-ignition on several points
5-flame arrester at inlet
6-flame arrester at outlet
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352 46 Växjö
Tel +46 470 485 50
Fax +46 470 485 60