WIKA R5502 Mode D'emploi page 7

1. Safety
Ex marking
II 2G Ex h IIC T6 ... T1 Gb X
II 2D Ex h IIIC T85 °C ... T450 °C Db X
Marking Designation
CE marking
Specific marking for
explosion protection
II Symbol of the
equipment group
2 Symbol of the
equipment category
Ex atmosphere
G
D Ex atmosphere
Ex Ex marking
h Ignition protection
type
Suitable atmosphere
IIC
IIIC Suitable atmosphere
Maximum surface
T6 ... T1
temperature
WIKA additional operating instructions model 55 (ATEX)
Meaning
European conformity
Ex symbol
Equipment intended for use in other
places than underground parts of mines,
and in those parts of surface installations
of such mines, liable to be endangered by
firedamp and/or combustible dust and an
explosive atmosphere.
High safety, approved for zone 1 and 21
Concerning explosive atmospheres
caused by gases, vapours or mists
Concerning explosive atmospheres
caused by dust
Standards ISO 80079-36 and
ISO 80079-37 applied
Non-electrical equipment for explosive
atmospheres
An ignition protection type is not applied
to the letter "h".
Gas atmosphere group IIC
Combustible flyings, non-conductive dust
and conductive dust
Symbol indicating the temperature class
The actual maximum surface temperature
depends not on the equipment itself, but
mainly on the operating conditions.
EN
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