WIKA 55 - Page 12

EN
11583747.07 12/2021 EN/DE/FR/ES
12 WIKA additional operating instructions model 55 (ATEX)
10) Ignition hazard analysis
Relevant identied
ignition hazards
Implemented protective measures
Hot surfaces
■
Actual surface temperature depends on
application; media temperature only
■
Temperature range marking; T range marking
■
Observation of legibility of marking
▶
Information given in operation instructions
Mechanically
generated sparks and
hot surfaces
■
Low contact speed
■
Limitation of vibration
■
Selection of suitable materials
▶
Information given in operation instructions
Stray electric currents,
cathodic corrosion
protection
■
Grounding via process connection required
▶
Information given in operation instructions
Static electricity
■
No propagating brush discharge
■
All conductive parts bonded
■
Limitation of projected area of non-conductive
parts
■
Limitation of layer thickness of
non-conductive parts
■
Grounding via process connection required
■
Description of cleaning process
▶
Information given in operation instructions
Exothermic reactions,
including self-ignition
of dusts
■
Provision of material data of the wetted parts
for the customer in order to avoid the use of
critical media
▶
Information given in operation instructions
11) The legibility of the marking must be observed during time in use
but at least during inspection periods of three years. If any harm
of the legibility is found please contact the manufacturer to renew
the marking.
12) Due to potential ignition hazards (e.g. static discharge), the
packaging material and the desiccant bag must not be put in the
hazardous area.
13) Permissible operating pressure at the stem: max. 25 bar [360 psi],
static
3. Special conditions for use (X conditions)