ATEX Zone 0 fansM

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ATEX fans 1

experience since 1985

Hoffmann La Roche(Basle, CH)

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(Basle, CH)• transport of explosive,

toxic and corrosive gases

• 2000 m³/h• 70 mbar• T° : - 50°C … + 200°C

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ATEX fans 2

• system pressure 8 bar • 12 bar explosion

resistance

1985 biogas

Hofstetter (CH)• transport of biogas

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• transport of biogas (methane)

• up to 2000 Nm³/h with 180 mbar

• system pressure 6 and 10 bar

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and 10 bar

1992 solvent vapour

Hoffmann La Roche (Basle,CH )

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(Basle,CH )• solvent vapour• 200 m³/h• model ER10• LRV- installation

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ATEX fans 4

with 30 fan units

explosion tests and certificatesPTB (Physikalisch-Technische Bundesanstalt, Braunschweig)

and IBExU

30'000

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Zone 0 Ventilatoren

ER IIB3/200/630/2

ER IIA/71/450/2

ER IIA/100/630/2

ER IIA/140/630/2

ER IIA/200/630/2

ER IIB3/140/630/2ER IIB3/100/630/2

15'000

20'000

25'000

30'000

Dru

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ER IIB3/200/630/2

ER IIB3/71/450/2

ER IIB1/280/630/2

5'000

10'000

0 1'000 2'000 3'000 4'000 5'000 6'000 7'000 8'000 9'000[m³/h]

Lonza 1997Halar-coated

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RM

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Sanofi

Sanofi Synthélabo (F)• transport of solvent

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• transport of solvent vapours

• 1500 Nm³/h• system ER10• up to today 20 units

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installed at this customer

SanofiM

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ATEX fans 2009 8

PETROPLUSM

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NovartisM

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BASFM

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Lonza ChinaM

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ATEX 100 - 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).

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intended to achieve different objectives. Responsibilities and duties are shared between the manufacturer and user (employer).

1999/92/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

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• 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 2003 . and set out the minimum requirements. Member states are free to introduce more stringent measures if they wish.

directive for manufacturersATEX 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

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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

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• 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.

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

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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

These groups are sub-divided into categories

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These groups are sub-divided into categories

category 1 (for zone 0)

Cat. 1 comprises products designed to be capable of remaining in areas in which explosive atmospheres caused by mixtures of air and gases, vapours, mists

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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 frequentlyEquipment 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,

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� 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.

category 2 (for zone 1)

Cat. 2 comprises products designed to be capable of remaining in areas in which explosive atmospheres

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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

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operating faults or in dangerous operating conditions which normally have to be taken into account.

category 3 (for zone 2)

Cat.3 comprises products designed to be capable of remaining in areas in which explosive atmospheres

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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

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provide a sufficient level of safety during normal operation.

standard fan without specific risks

designed without specific measurements

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standard design

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category 2 or 3M

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motorEEx e

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EEx de(for FU)

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prevention of the generation of sparks or hot surfaces by appropriate design

category 2 or 3 / gastightM

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non-sparking design

seal

motorEEx e

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EEx de(for FU)

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gastight design to avoid escape of gas into the atmosphere or towards the motor

category 2

design ER

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non-sparking design

seal

design ER

motorEEx e

or

EEx de(for FU)

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also under unnormal circumstances the fan must not generate any sparks or hot surfaces

category 1M

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design ER

flame arresters

non-sparking design

seal

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category 1

cat.1 = (permanently explosive medium) requires additional measurements.

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requires additional measurements.

Up to today all solutions are limited to gas (cat.1G), since dust (cat.1D) cannot pass the flame arresters.

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requirements for cat.1

protection measurements must guarantee

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• 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 inde-pendently of each other a sufficient level of safety is ensured

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solution:explosion resistant design + flame arresters

requirements for cat.1

• the protective systems must be able to withstand an explosion inside the fan.

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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

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design ER + flame arresters close to the fanproof by real explosion tests

flame arrestersM

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PT100

each type has been proofed (16x) by real

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explosion tests to demonstrate the efficacy of the measurements

size and sensors

• the design of the fan and the choice of the material is determined by the expected pressure and

case of an explosion

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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 sensorsto indicate a fire or abnormal temperature. The sensors are connected with other elements to stop

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sensors are connected with other elements to stop the process and to separate other parts of the installation.

operating conditions

Sensors measure the temperature at the flame arresters to detect a fire and at the same time they

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arresters to detect a fire and at the same time they indicate an abnormal temperture of the medium. Fans for category 1 are always designed for specificoperating conditions , which are given by

• speed rate (rotation)• operating temperature• category of the media

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• pressure

under no circumstances the fan can be used outside the range of these specifications !

risk analysis

• hazard identificationwhich hazards exist under normal circumstances, which in the

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which hazards exist under normal circumstances, which in the case of a fault (EN 1127-1)

• risk estimationProbability 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

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• risk evaluation and reductionComparison and decision, whether the risk is acceptable or not

risks EN 1127-1

• probability and volume of explosive media› degree of dispersion and concentration

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› degree of dispersion and concentration

• ignition sources› hot surfaces, flames› mechanically generated sparks› electric units, motors, switches› electrostatic and electrochemical effects

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› lightning› electromagnetic waves, radiation, › shocks waves, exotherm reactions

conformity assessment

group ll

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cat.1 cat.2 cat.3

EC type examination

technical documentation to

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controled production , quality systemdocumentation

technical documentation to Notified Body

quality system

• compliance with given standards • qualification of staff

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• qualification of staff• defined responsibility• clear workflow• complete documentation

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• identification

identification labelconditions for use

identifcation

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• G= for gas (dust=D)

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• surface max 135°C (T4)

• motor for frequency control EEx de

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0080 1D / 3Dmeans

0080 : number of the ‚Notified Body‘ who checked the quality system

1D : inside category 1 for dust

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1D : inside category 1 for dust/3D : outside category 3 for dust

explosion tests (type examination)

1-inlet2-outlet3-throttlel

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3-throttlel4-ignition on several points5-flame arrester at inlet6-flame arrester at outlet7-flame sensor8-pressure sensor

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product range ER

Zone 0 VentilatorenER IIA/100/630/2

30'000D

ruck

[Pa]

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Zone 0 Ventilatoren

ER IIB3/200/630/2

ER IIA/71/450/2

ER IIA/140/630/2

ER IIA/200/630/2

ER IIB3/140/630/2ER IIB3/100/630/2

15'000

20'000

25'000

Dru

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ER IIB3/71/450/2

ER IIB1/280/630/2

5'000

10'000

0 1'000 2'000 3'000 4'000 5'000 6'000 7'000 8'000 9'000[m³/h]

ATEX links

• directive 94/9/EG (ATEX 100a) http://europa.eu.int/comm/enterprise/atex/direct/newapproach.

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http://europa.eu.int/comm/enterprise/atex/direct/newapproach.htm

• directive 1999/92/EG (ATEX 137)http://europa.eu.int/comm/enterprise/atex/dir92-en.pdf

• guidelinehttp: //europa.eu.int/comm/enterprise/atex/guide/guide_en.pdf

• standardsEN 1127-1 : explosive atmosphere

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ATEX fans 38

EN 1127-1 : explosive atmosphere http://www.pellmont.ch/sikeda/deutsch/cen114/en1127-1.htm

thank you for your attention

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© MEIDINGER AGa company of the WITT-group

for your attention

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ATEX fans 39

a company of the WITT-groupLandstrasse 71

CH 4403 KaiseraugstTel +41 61 487 44 11Fax +41 61 487 44 00atex@meidinger.chwww.meidinger.ch