PRODUCT INFORMATION
EXPLOSION-PROOF PRODUCT RANGE
COILS WITH ATEX II CERTIFICATION FOR ELECTROVALVES
INTRODUCTION
The explosion-proof coils are in compliance with ATEX 94/9/EC standards and are
suitable for the use in potentially explosive atmospheres, that fall within the ATEX II 2GD
either for gas or for dust classification, and the ATEX I M2. The statement of conformity
to the up-mentioned standards is always supplied with the coils.
ATEX CLASSIFICATION
The coil of the explosion-proof valves is identified with its own tag, which carries the relative ATEX marking. The mechanical construction
of the coil housing is made in order to ensure its resistance to possible internal explosion and to avoid any explosion propagation to
the outside environment, matching an “Ex d” type protection (explosion-proof coil).
The solenoid is designed to maintain its surface temperature below the limits specified to the relevant class. The R* coils (for alternating
current supply) contain a built-in rectifier bridge.
Here below you find the coils marking:
MARKING FOR DUSTS
MARKING FOR GASES, VAPOURS, MISTS
II 2D Ex tb IIIC T154°C Db IP 66/IP68 (-40°C Ta +80°C)
II 2G Ex d IIC T4 Gb (-40°C Ta +80°C)
EX:
Marking of explosion protection as ATEX 94/9/EC
directive and related technical specifications.
II:
Group II for surface plants
2:
Category 2 high protection, eligible for zone 1
(therefore also eligible for category 3 zone 2)
G:
Type of atmosphere with gases, vapours, mists
Ex d:
“d” protection type, explosion-proof case
IIC:
Gas group (therefore also eligible for group IIA
and IIB)
T4:
Temperature class (max surface temperature)
Gb:
EPL protection level for electrical devices
-40°C Ta +80°C:
Ambient temperature range
EX 2:
Marking of explosion protection as ATEX 94/9/EC
directive and related technical specifications.
II:
Group II for surface plants
2:
Category 2 high protection, eligible for zone 21
(therefore also eligible for category 3 zone 22)
D:
Type of atmosphere with dusts
Ex tb:
‘tb’ protection type
IIIC:
Dusts group (therefore also eligible for group IIIA
and IIIB)
T154°C: Temperature class (max surface temperature)
Db:
EPL protection level for electrical devices
IP66/IP68:Protection degree from atmospheric agents
according to IEC EN 60529
-40°C Ta +80°C:
Ambient temperature range
Marking for version in T5 temperature class:
Marking for version in T5 temperature class:
II 2G Ex d IIC T5 Gb (- 40°C Ta +55°C)
II 2D Ex tb IIIC T129°C Db IP66/IP68 (- 40°C Ta +55°C)
MARKING FOR MINES
I M2 Ex d I T150°C Mb IP 66/IP68 (-40°C Ta +75°C)
EX:
Marking of explosion protection as ATEX 94/9/EC
directive and related technical specifications
I:
Mines equipments
M2:
Category M2 high protection (de-energised in the
event of an explosive atmosphere)
Ex d:
“d” protection type, explosion-proof case
I:
Gas group
T150°C: Temperature class (max surface temperature)
Mb:
EPL protection level for electrical devices
IP66/IP68: Protection degree from atmospheric agents
according to IEC EN 60529
-40°C Ta +75°C:
Ambient temperature range
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STRUCTURE
The coil block is composed of a lower part containing the coil itself and an upper part containing
the elements to be used for the electrical connection. These elements are:
1.
2.
3.
4.
5.
6.
Terminal block
Screws for the cover fastening
Cover
Box
Internal grounding point
External grounding point
The cable gland must be screwed on the terminal block box, either on the upper part or
sideways. The cable gland itself is certified according to ATEX II 2GD and ATEX I 2M standards.
ELECTRICAL CONNECTION
In order to realise the electrical connection of the coil, it is necessary to access the terminal block
unscrewing the screws that fasten the cover.
It is important to connect both the internal and the external grounding point to the general
grounding line of the system, in order to ensure equipotentiality.
Electrical wiring must be done following the instructions of the rules in compliance with ATEX
standards.
OVERALL DIMENSIONS
[dimensions in mm]
ELECTRO-VALVES
The explosion-proof coils can be mounted on different types of electro-valves:
CODE
TYPE
SIZE
POWER SUPPLY
RQM*KD*-P
Solenoid operated pressure relief valves with
unloading and pressure selection
CETOP R06/R08/R10
DS(P)*KD*
Solenoid operated directional control valves
Direct CETOP 03/05
Pilot CETOP 05/07/08/10
DC 12/24/48/110V
RAC 120/240V
DC 12/24/48/110V
RAC 120/240V
CETOP 03
DC 24V
CETOP 03/R06/R08/R10
DC 12/24V
DT3-3CB
PRE(D)(3)*KD*
Poppet type solenoid operated directional valve
Pressure relief proportional valves
ZDE3KD*
Direct operated pressure reducing proportional valves
CETOP 03
DC 12/24V
DZCE*KD*
Pilot operated pressure reducing proportional valves
CETOP 05/07/08
DC 12/24V
DS(P)E*KD*
Directional proportional valves
Direct CETOP 03
Pilot CETOP 05/07/08/10
DC 12/24V
For further details on technical characteristics and for the identification code please refer to the complete data sheet of each valve in our website.
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