1. ATEX fans st
ATEX

2. 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 st
ATEX

3. 1985 biogas Hofstetter (CH) transport of biogas (methane)
up to 2000 Nm³/h with 180 mbar
6 or 10 bar explosion resistance st
ATEX

4. 1992 solvent vapour Hoffmann La Roche (Basle,CH) solvent vapour
200 m³/h
model ER10
LRV- installation with 30 fan units st
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5. 1993 to explosion tests and certificate PTB (Physikalisch-Technische Bundesanstalt, Braunschweig)
ER IIB3/100/520 zweistufig
ER IIA/100/520 zweistufig
ER IIB3/100/500
ER IIA/100/500 st
ATEX

6. project ATEX 94/9/EG
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 st
ATEX

7. sanofi 1999 Sanofi Synthélabo (F) transport of solvent vapours
1500 Nm³/h
system ER10
up to today 20 units installed at this customer st
ATEX

8. ATEX ATEX 137
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) /92/EC (ATEX 137)
Covers health and safety protection of workers
Duties are placed on the employer
Intended to ensure that workers enjoy a minimum level of protection throughout all member states
1994/9/EC (ATEX 100a)
Covers products intended for use in hazardous areas
Duties are placed on the manufacturer/supplier of the product
Intended to facilitate the free movement of goods within the EU
Both ATEX 137 and ATEX 100a became mandatory on 1st July and set out the minimum requirements. Member states are free to introduce more stringent measures if they wish. st
ATEX

9. directive for manufacturers ATEX 100
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
non-electrical equipment intended for use in potentially explosive atmospheres and
equipment intended for use in environments which are potentially explosive due to dust hazards and
protective systems and for devices intended for use outside explosive atmospheres which are required for or contribute to the safe functioning of equipment or protective systems with respect to risks of explosion. st
ATEX

10. group and category
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 st
ATEX

11. category 1G (for zone 0)
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:
in the event of a failure of one integrated measure, at least a second independent means of protection provides for a sufficient level of safety; or,
in the event of two faults occurring independently of each other a sufficient level of safety is ensured. st
ATEX

12. category 2G (for zone 1)
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. st
ATEX

13. category 3G (for zone 2)
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. st
ATEX

14. There is the same classification for air/dust mixtures
Category 1D (for zone 20)
Category 2D (for zone 21)
Category 3D (for zone 22)
Actually, we have a complete range of solution other for the category 1D st
ATEX

15. standard fan without specific risks
designed without specific measurements
standard design st
ATEX

16. category 2 or 3 (G and/or D)
motor EEx nA
EEx e or
EEx de (for FU)
non-sparking design
prevention of the generation of sparks or hot surfaces by appropriate design st
ATEX

17. category 2 or 3 / gastight (G and/or D)
motor EEX nA
EEx e or
EEx de (for FU)
non-sparking design
seal
gastight design to avoid escape of gas into the atmosphere or towards the motor st
ATEX

18. category 2 (G and/or D)
non-sparking design
seal
design ER
motor EEx nA
EEx e or
EEx de (for FU)
also under abnormal circumstances the fan must not generate any sparks or hot surfaces st
ATEX

19. category 1G design ER non-sparking design flame arresters seal
ATEX

20. category 1
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. st
ATEX

21. requirements for cat.1G protection measurements must guarantee
in the event of a failure of one integrated measure, at least a second independent means of protection provides for a sufficient level of safety; or,
in the event of two faults occurring independently of each other a sufficient level of safety is ensured
solution:
explosion resistant design + flame arresters st
ATEX

22. requirements for cat.1G
the protective systems must be able to withstand an explosion inside the fan.
the protective systems must be arranged in such a way, that any dangerous chain reaction is impossible. Flames or deflagrations inside the fan must not escape and cause detonations outside.
solution:
design ER + flame arresters close to the fan
proof by real explosion tests st
ATEX

23. flame arresters
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 st
ATEX

24. Actuelly concept and design ERst
ATEX

25. size and sensors
the design of the fan and the choice of the material is determined by the expected pressure and temperature in case of an explosion or in case of a fire. Also thermal reaction can cause a heating. The fan withstands an explosion shock without reduction of the safety function of the system.
the protective devices are equipped with sensors to indicate a fire or abnormal temperature. The sensors are connected with other elements to stop the process and to separate other parts of the installation. st
ATEX

26. operating conditions
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 specific operating conditions, which are given by
speed rate (rotation)
operating temperature
category of the media
pressure
under no circumstances the fan can be used outside the range of these specifications ! st
ATEX

27. risk analysis
hazard identification which hazards exist under normal circumstances, which in the case of a fault (EN )
risk estimation Probability of occurrence of the identified hazards and of the levels of severity of the possible harm of the considered hazards (see as well EN 1050).
risk evaluation and reduction Comparison and decision, whether the risk is acceptable or not st
ATEX

28. risks EN 1127-1 probability and volume of explosive media
degree of dispersion and concentration
ignition sources
hot surfaces, flames
mechanically generated sparks
electric units, motors, switches
electrostatic and electrochemical effects
lightning
electromagnetic waves, radiation,
shocks waves, exothermal reactions st
ATEX

29. conformity assessment
group ll
cat.1
cat.2
cat.3
Certification from QS
according to ATEX
EC type
examination
technical documentation to
Notified Body
controlled production , quality system
documentation st
ATEX

30. quality system compliance with given standards qualification of staff
defined responsibility
clear workflow
complete documentation
identification st
ATEX

31. identification label conditions for use identification
category 1G into the fan and 2G out
G= for gas
surface max 135°C (T4)
motor for frequency control EEx de st
ATEX

32. G / 2G – IIA – T4
means
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
T : maximal temperature of surfaces st
ATEX

33. explosion tests (type examination) according to EN 12874
1-inlet
2-outlet
3-throttlel
4-ignition on several points
5-flame arrester at inlet
6-flame arrester at outlet
7-flame sensor
8-pressure sensor st
ATEX

34. product range ER st
ATEX

35. ATEX links
directive 94/9/EG (ATEX 100a)
directive 1999/92/EG (ATEX 137)
guideline
standards EN : explosive atmosphere st
ATEX

36. thank you for your attention
FläktComp Sweden AB
Slöjdgatan 3
Växjö
Sweden
Tel
Fax st
ATEX