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ATEX

94/9/CE ATEX EC DIRECTIVE (EXPLOSIVE A TMOSPHERE)

Among the main potential causes/sources of triggering an explosion, such as sparks, flames, electric arcs etc.., maximum surface

temperature also plays an important role. The dispositions of the directive establish evaluation criteria for the maximum temperature admissible

depending on the type of explosive atmosphere in which the appliance must operate.

For environments characterised by the presence of gas-air, some temperature values are supplied to which the appliances must refer.

They are indicated by the letter T followed by a number. The criterion to apply is that for which the temperature of the appliance must never

exceed 80% of the value indicated for its own category.

For environments characterised by the presence of dust-air, to prevent setting on fire of the airborne dust, the surface temperature

of the appliances must be decidedly lower than the predictable temperature of catching fire of the air+dust mixture. Therefore, during planning

the maximum working surface temperature must be declared directly (in degrees centigrade).

Increases in temperature deriving from an accumulation of heat and chemical reactions must also be taken into consideration. The

thickness of the deposited layer of dust must also be considered and, if necessary, limit the temperature, to prevent an accumulation of heat.

INTRODUCTION

Since 30/06/2003 products introduced into the market (or started-up) inside the EU,

destined to be used in potentially explosive environments, must be in compliance with the 94/

9/EC Directive through special marking. The directive regarding ATEX products 94/9/EC is

therefore the regulation instrument that the European Union uses to obtain legislative

harmonisation between the States and guarantee free circulation of goods inside the

European Community itself.

The directive affirms that to eliminate obstacles from commerce it is necessary to

guarantee a high level of protection and, with this aim, define the essential requirements on

the subject of safety and health. The dispositions base themselves on the principle of the “new

approach” (NA), for which the essential safety requirements of products must be established

depending on the risk evaluation concurrent at the time of their use.

The 94/9/EC Directive is applied to the manufacture specifications of all those

products (electrical and not) destined to be used in potentially explosive environments

caused, by the dangers deriving from the presence of dust or gas, with the scope of reducing

the risk of use that could be derived.

The term product refers to appliances, protection systems, devices, components and

relative combinations, as defined in 94/9/EC Directive.

The term appliances intends machines, materials, fixed or mobile devices, control

elements, instruments detection and prevention systems. Alone or combined these are

destined for production, transport, deposit, measurement, adjustment and conversion of

energy, and to the transformation of material and which, by way of the powerful triggering

sources, risk causing an explosion. As a consequence, even intrinsically safe appliances

re-enter within the field of application of the directive.

Ther combination of two or more appliance parts, as well as any other components,

makes up a whole unit that can be considered a product and therefore re-enters within the

field of application of the 94/9/EC Directive. If the whole unit requires adequate installation

(therefore it is not immediately ready for use) the attached instructions should guarantee

maintenance of compliance to the 94/9/EC Directive on installation, without further evaluations

of conformity. The installer must follow the instructions correctly.

When a combination of appliances leads to a plant this may not re-enter within the field

of application of the directive. Each part must be certified and in compliance with the directive

(as well as being subject to the relative evaluation of conformity, EC marking, etc.).

The plant manufacturer must therefore presume the conformity of the various

components (each supplied with conformity certificate released by the respective manufacturer)

and limit their evaluation only to any additional risks that become important in the final

combination. Nevertheless, if the plant manufacturer inserts parts without EC marking or

components not supplied with the certificate it will be obligatory to carry out further conformity

evaluation of the whole unit.

The 94/9/EC Directive envisions obligations of the person who introduces products

into the market and/or starts them up, whether they are manufacturer’s, his agent’s, importer’s

or any other responsible person. The dispositions and obligations envisioned by the directive

for introduction into the market have been applied, since 30 June 2003, to every individual

product, independently from the date and place of manufacture. It is the manufacturers

responsibility to guarantee conformity of all products, where these re-enter within the field of

application of the directive.

The directive does not govern the use of the appliances; rather it establishes that the

products can only be used if in compliance with safety requirements at the time of their

introduction into the market or of their start-up. “Start-up” means the first use of the products

subject of the 94/9/EC Directive on EU territory by a final user. Nevertheless, a product that

is immediately ready for use and does not need assembly or installation, and whose

distribution conditions (deposit, transport, etc.) are not important for performance, is

considered started-up at the time of introduction into the market.

AD.3.XS.........

AD.3.XD...

AD.3.XD... / AD.3.XS...

ATEX DIRECTIVE CH. I PAGE 22

ATEX CLASSIFICATION CH. I PAGE 23

SERIES AD.3.X*... CH. I PAGE 24

TECHNICAL SPECIFICATIONS CH. I PAGE 24

ORDERING CODE CH. I PAGE 24

TAB.1 ASSEMBLY CH. I PAGE 25

TAB. 2 VOLTAGES CH. I PAGE 25

TAB.3 SPOOL CH. I PAGE 25

LIMITS OF USE CH. I PAGE 25

IDENTIFICATION NAMEPLATE CH. I PAGE 26

SAFETY INSTRUCTIONS CH. I PAGE 26

OVERALL DIMENSIONS CH. I PAGE 27

AD.3.X*... DIRECTIONAL CONTROLE CETOP 3

IN ACCORDANCE WITH 94/9/CE ATEX DIRECTIVE

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ATEX

CLASSIFICATIONS OF A REA - MIX - GROUP AND RELATIVE C ATEGORY – ACCORDING TO A TEX DIRECTIVES

The 94/9/EC Directive is a “new approach” directive based on risk analysis. Its objective is to minimise the risks deriving from the use

of some products indoors or in relation to a potentially explosive atmosphere. The probability of an explosive atmosphere manifesting must

be considered not only as “one-off” or from a static point of view: all operative conditions that can derive from the transformation process must

be taken into consideration.

• An explosive atmosphere for the 94/9/EC Directive is made up from a mixture of inflammable substances (as gas, vapours, mists

and dust), with air, in determined atmospheric conditions in which, after triggering, the combustion propagates together with the unburned mixture.

• An atmosphere susceptible to transforming into an explosive atmosphere because of local and/or operative conditions is defined

potentially explosive atmosphere.

Explosive atmospheres are not only formed in the presence of obviously dangerous substances such as fuel, solvents etc., but also

in the presence of apparently harmless products such as wood dust, metal dusts, flour, grain, sugar etc. Therefore it can concern not only

industries in the chemical or oil industry sectors, but also industries in the foodstuffs, textile, manufacturing etc.. It is important to consider that

to re-enter within the 94/9/EC Directive a product must be applied in presence of one or more of the characteristic elements listed above:

presence

of inflammable substances and air, in atmospheric conditions that favour the propagation of combustion

. The directive does not define the

atmospheric conditions itself. The relative norms indicate a temperature range, but this does not exclude that the products may be planned

and evaluated specifically to occasionally function outside of this range, introducing the opportune construction transformations.

To define a conformity evaluation procedure adequate for the directive, the Manufacturer must, on the basis of the

declared use, establish the products functioning conditions (this means to say, envision the type of working area, the type of

explosive mixture with which it will come into contact and the level of probability that an explosive atmosphere verifies itself);

successively he must establish to which Group the product belongs and individualise the category inside the Group.

With the Atex 99/92/EC Directive (For the safety of workers) the working conditions in which products in compliance with Atex 99/4/EC

Directive will function are indicated here. These are expressed in “Areas” and defined according to the level of probability that a potentially

explosive atmosphere is verified, respectively for every type of atmosphere (gas-air mix or dust-air mix).

Area 0 and 20 Places in which an explosive atmosphere is constantly present or present for long periods or frequently.

Area 1

and 21 Places in which an explosive atmosphere is probable. It is verified in normal functioning and exercise conditions.

Area 2 and 22

Places in which an explosive atmosphere has low probability of being verified or, if it occurs only lasts for a brief period of time.

GAS-AIR-TYPE EXPLOSIVE MIXTURE (G)

The products destined to work in environments characterised by this type of explosive atmosphere will be respectively

indicated for Area 0, 1 or 2 depending on the Group and category of origin (see below) and are marked with the letter G.

DUST-AIR-TYPE EXPLOSIVE MIXTURE (D)

The products destined to work in environments characterised by this type of explosive atmosphere will be respectively indicated for

Area 20, 21 or 22 depending on the Group and category of origin (see below) and are marked with the letter D.

GROUP I

Includes the appliances destined to be used in underground jobs in the mines and their surface plants, exposed to the risk of the release

of firedamp and/or combustible dust.

The subdivision into categories depends on the fact if the power supply must be interrupted or not if an

explosive atmosphere manifests due to a mixture of air and gas, vapours mists (D) or a mixture of air and dust (G).

Category M1 Very high protection level. These products must be able to remain operative, for safety reasons, in the presence of

an explosive atmosphere and present specific performances or protection configurations for breakdown in case of explosion.

Category M2 High protection level. The power supply to these products must be interrupted in the presence of an explosive

atmosphere. Protection means must be incorporated to guarantee the level of protection during normal functioning and also in oppressive working

conditions or resulting from great stressi.

GROUP II

Includes appliances destined to be used in different environments (from the mines) in which there is a probability that an explosive

atmosphere manifests itself.

Their subdivision into categories depends on two factors: the place, where the product will be used and if the

probability that a potentially explosive atmosphere, owing to the mixture of air and gas, vapours, mists (D) and the mixture of air and dust (G),

comes about in a constant or occasional manner and if it does occur, does this possibility remain for long or brief period of time.

Category 1 Very high protection level. These products must be planned to function in compliance with operative parameters

established by the Manufacturer in environments in which there is a high probability that explosive atmospheres are always detected or manifest

often or for long periods of time. They must present specific performances or protection configurations for breakdown in case of explosion.

Category 2 High protection level. These products must be planned to function in compliance with operative parameters

established by the Manufacturer in environments in which there is a high probability that explosive atmospheres can manifest.

Protection against explosions relative to this category must function in a way to guarantee the required safety level even in the

presence of functioning defects of the appliances or in dangerous operative conditions, which frequently must be taken into

consideration.

Category 3 Normal protection level. These products must be planned to function in compliance with operative parameters

established by the Manufacturer in environments in which there is a slight probability that explosive atmospheres can manifest, and however

only rarely or for a brief period of time. This type of product belonging to the category in question must guarantee the safety level required in

normal functioning conditions.

AD.3.X*... DIRECTIONAL CONTROLE CETOP 3

IN ACCORDANCE WITH 94/9/CE ATEX DIRECTIVE

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ATEX

AD.3.XS.........

AD.3.XD...

AD.3.X*... DIRECTIONAL CONTROLE CETOP 3

IN ACCORDANCE WITH 94/9/CE ATEX DIRECTIVE

SOLENOID VALVES FOR USE IN WORKPLACES WHERE EXPLOSIVE ATMOSPHERES

MAY

OCCUR DUE TO THE PRESENCE OF GAS, VAPOUR OR MIST AND DUST.

AD3.X* solenoid valves are classified in:

Group II appliances (to be used in workplaces, apart from mines, where there is the probability

of explosive atmospheres);

category 2 (high protection level), for use in workplaces where it is probable that an explosive

atmosphere may form in normal working conditions and classified by the presence of

explosive mixtures:

- Atmosphere gas-dust type (letter GD) for zones 1 and 21, AD3XD solenoid valves.

- Atmosphere gas type (letter G) for zones 1 and 2, AD3XD solenoid valves.

These valves are therefore designed especially and manufactured in compliance with the

ATEX 94/9/EC Directive and according to European regulations EN 1127-1, EN 13463-1 and

EN 13463-5.

Belonging to the "NG06 direction control" of Aron range, these valves are prepared for plate-

mounting with attachment surface in compliance with UNI ISO 4401 - 03 - 02 - 0 - 94 (former

CETOP R 35 H 4.2-4-03). They are activated electrically and the centre position is ensured

by springs with gauged lengths, which once the pulse or command ceases, re-position the

spool in the centre or at the end of travel position.

The coils used for these valves are subject to separate conformity certification, according

to the ATEX Directive (EC-type). For further specifications, please consult the documents

that are always supplied with the valve.

Before marking and marketing the valves of the AD3XD / AD3XS series, undergo tests and

inspections according to the in-house Manufacturing System and to the Certified Company

Quality System in compliance with ISO 9001:2008. All of the AD3XD and AD3XS valve series

undergo 100% functional testing. These tests and inspections guarantee that the products

sold comply with all the information reported in the Technical Specifications File registered

and declared by marking with AD3X/ATEX/10.

ORDERING CODE

AD Directional Control Valve

3 CETOP 3/NG06

X* Solenoid valves built pursuant to

ATEX Directive-94/9/EC

D = With coils in explosion-proof

version (Ex d)

S = With coils in increased safety

version (Ex me)

** Spools

01/02/03/04/16 (tab.3)

For further hydraulic diagrams,

contact Aron Customer Service

* Assembly

C / E / F / G / H (tab.1)

For further assembly instructions,

contact Aron Customer Service

* Voltage (tab.2)

** Variants

00 = None

V1 = Viton (just for AD3XD)

LE = Emergency lever

(just for AD3XD)

2 Serial number

TECHNICAL SPECIFICATIONS

AD.3.XD... / AD.3.XS...

ATEX DIRECTIVE CH. I PAGE 22

ATEX CLASSIFICATION CH. I PAGE 23

SERIES AD.3.X*... CH. I PAGE 24

TECHNICAL SPECIFICATIONS CH. I PAGE 24

ORDERING CODE CH. I PAGE 24

TAB.1 ASSEMBLY CH. I PAGE 25

TAB. 2 VOLTAGES CH. I PAGE 25

TAB.3 SPOOL CH. I PAGE 25

LIMITS OF USE CH. I PAGE 25

IDENTIFICATION NAMEPLATE CH. I PAGE 26

SAFETY INSTRUCTIONS CH. I PAGE 26

OVERALL DIMENSIONS CH. I PAGE 27

Description AD3XD... AD3XS...

Valve marking II 2 GD cT5 II 2 G cT4

Max. pressure on lines P/A/B 320 bar 320 bar

Max. pressure on line T (dynamic) 250 bar 70 bar

Max. flow rate 60 l/min 60 l/min

Max.excitation frequency 3 Hz 3 Hz

Duty cycle 100%ED 100%ED

Hydraulic fluids mineral oils DIN 51524 mineral oils DIN 51524

Fluid viscosity 10 ÷ 500 mm

/s 10 ÷ 500 mm

Fluid temperature -20°C ÷ +40°C -30°C ÷ +60°C

Ambient temperature -20°C ÷ +40°C -30°C ÷ +60°C

Max.contamination level class 10 according to class 10 according to

NAS 1638 with filter ß

≥75 NAS 1638 with filter ß

≥75

Weight (one solenoid) 2,37 kg 2,10 kg

Weight (two solenoids) 3,82 kg 3,40 kg

Coil rated power 11-13 W

Degree of protection IP 67 IP 66

Power supply tolerance ±10% -10% ÷ 0%

Power supply cable standard length 3m Cable gland

with cable gland according to Atex for cable

with outside Ø 7÷ 12 mm

Coil marking: consult documents supplied with coil

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ATEX

TAB.3 SPOOL

TAB. 2 VOLTAGES

TAB.1 ASSEMBLY

The tension symbol is always printed on the

nameplate.

(*) spool with increased price

AC for for

Voltage AD3XD AD3XS

A 24/50Hz 24/50Hz

B* / 48/50Hz

C 110V/50Hz /

J / 115V/50Hz

D 220V/50Hz /

I 230V/50Hz 230V/50Hz

DC for for

Voltage AD3XD AD3XS

L 12V 12V

M 24V 24V

P* 110V /

N 48V /

(*) special voltage

Two solenoids - Assembly C

Type of Cover Transit position

spool

01 +

02 -

03 +

04* -

One solenoid - Assembly F

Type of Cover Transit position

spool

01 +

02 -

03 +

04* -

16 +

One solenoid - Assembly E

Type of Cover Transit position

spool

01 +

02 -

03 +

04* -

16 +

STANDARD

C Two solenoids centred

E One solenoid (side A)

F One solenoid (side B)

Specials (with increased price )

LIMITS OF USE (MOUNTING C-E-F)

P (bar)

Q (l/min)

P (bar)

Q (l/min)

AD.3.XD... AD.3.XS...

The tests have been carried out with

solenoids at operating temperature with

a voltage 10% less than rated voltage

with a fluid temperature of 40°C. The

fluid used was a mineral oil with a

viscosity of 46 mm

/s at 40°C. The

values in the diagram refers to tests

carried out with the oil flow in two

direction simultaneously (e.g.. from P

to A and in the same time B to T).

In cases where valves 4/2 e 4/3 were

used with the flow in one direction

only, the limits of use could have

variations which may even be

negative.

Spool

type AD3XD

01 2

02 1

03 3

04 4

16 1

AD3XS

01 6

02 5

03 7

04 8

16 5

Curva

AD.3.X*... DIRECTIONAL CONTROLE CETOP 3

IN ACCORDANCE WITH 94/9/CE ATEX DIRECTIVE

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ATEX

SAFETY INSTRUCTIONS

IDENTIFICATION NAMEPLATE AND MARKING

AD.3.X*... DIRECTIONAL CONTROLE CETOP 3

IN ACCORDANCE WITH 94/9/CE ATEX DIRECTIVE

Pmax 320bar

Tamb: -**°C ÷ +**°C

Tfluido: -** ÷ +**°C

Made in Italy

M82101020A

www.aron.it

www.brevinifluidpower.com

plant

CODE

BATCH

HYDRAULIC

SCHEME

13 14

123456

All the solenoid valves are

supplied with identification

nameplate and

Declaration of conformity

subject to Directive 94/9/EC.

The identification nameplate

bears the main technical

specifications related to the

functional and constructional

characteristics of the valve

and must therefore be kept

intact and visible.

• Read the instruction handbook supplied with the valves carefully before installation. All maintenances must be carried out following the

instructions given in the manual.

• The AD3XD and AD3XS series valves must be installed and serviced in compliance with plant engineering and maintenance regulations

for workplaces classified against the risk of explosion due to the presence of gas and dust and gas (for example: CEI EN 60079-14, CEI

EN 60079-17, CEI EN 61241-14, CEI EN 61241-17 or other national regulations/standards).

• The valves must be connected to earth using the special anti-loosening and anti-rotation connection element.

• For all safety aspects related to the use of the coils, consult the relative use and maintenance instructions. The electrical appliances/

components must not be opened when live.

• The user must periodically inspect, based on the conditions of use and the substances used, the presence of scale, dirt, the state of wear

and tear and correct efficiency of the valves.

Attention: all installation and maintenance jobs must be carried out by qualified personnel.

1 Conformity to European Directive

2 Conformity to

ATEX Directive 94/9/EC

3 II 2 Group II (surface places)

Category 2 (high protection)

4G* Explosive atmosphere:

GD: presence of gas, vapour or

mist and combustible dust (series

AD3XD)

G: presence of gas, vapour or

mist (series AD3XS)

5c Constructional safety

6T* Temperature class:

T5 (<100 °C) series AD3XD

T4 (<135 °C) series AD3XS

AD3X/ATX/10

Reference to Technical File

registered c/o Notified Body

8 T amb Working ambient temperature:

- 20°C ÷ + 40°C series AD3XD

- 30°C ÷ + 60°C series AD3XS

9 T fluid Working fluid temperature:

- 20°C ÷ + 40°C series AD3XD

- 30°C ÷ + 60°C series AD3XS

HYDRAULIC

Type of hydraulic control

SCHEME

performed by the valve

M82101020A

Nameplate code

12 BATCH Reference number of

technical order (batch)

Pmax 320 bar

Max.working pressure

CODE

Complete reference number of

valve ordering code

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ATEX

OVERALL DIMENSIONS

AD.3.X*... DIRECTIONAL CONTROLE CETOP 3

IN ACCORDANCE WITH 94/9/CE ATEX DIRECTIVE

AD.3.XS...

AD.3.XD...LE.

AD.3.XD...

117

167,7 69,5 114,7

134,5

18,5

26,5

OR 2-012/90SH

27,75

10,4

8,8 8,7

21,5 19

351,9

242,4

32,5

1.6

0.03

Support surface

specifications

Fixing screws UNI 5931 M5x30

with material specification min.

8.8

Tightening torque 5 Nm / 0.5

kgm

1.6

0.03

Support surface

specifications

Fixing screws UNI 5931 M5x30

with material specification min.

8.8

Tightening torque 5 Nm / 0.5

kgm

1.6

0.03

Support surface

specifications

Fixing screws UNI 5931 M5x30

with material specification min.

8.8

Tightening torque 5 Nm / 0.5

kgm