ATEX Instruction Manual
Dura 05-55
Version 1.0v-07/2019
10 | Page
Ignition Hazard
Measures Applied to Prevent the Ignition Source Becoming Effective
Potential
Ignition
Source
Description / Basic
Cause (which causes
originate
which ignition
hazard)
Reason for
Assessment
Description of the Measure
Applied
Basis Citation of
Standard
Technical Rules
Electrical
Equipment
– Electric motor inside the
assembly
Electrical equip
-
ment is a pos-
sible ignition
source
u
Only electrical equipment with
certification of conformity is
used
IEC 60079 series
Stray Electrical,
Currents and
Cathodic Cor-
rosion
Protection
u
No stray currents or cathodic
corrosion
Static Electricity
– Static build up generat-
ing spark
Hose
u
Static dissipative
EN 80079-36:2016 6.7.5
– Static build up generat-
ing spark
Plastic window,
potential risk
during cleaning
a static build up
may occur. No
charging during
normal opera-
tion.
u
Apply Cat 3 restrictions, if Cat
2 needed then change mate-
rial of the window.
EN13463-1:2009, 6.7.3
Lightning
–
Lightning strike
u
End user to assess and pro-
tect equipment accordingly
EN 80079-36:2016 10
Electromag-
netic Waves
u
Not relevant
Ionising Radia-
tion
– Use in radioactive area
u
Not relevant, not approved for
use in radioactive area
EN 80079-36:2016 10
High Frequency
Radiation
u
Not relevant
Ultrasonics
u
Not relevant
Adiabatic
Compression
u
Not relevant
Mechanical
strength
– Impact
Potential impact
from other
source, falling
object, been
struck by mov
-
ing object.
u
Main housing cast iron, no
aluminium or similar to the
external, plastic window front
mounted but of a thickness to
withstand impacts up to 7Nm
see tests
EN 80079-36:2016 8.3.1
–
Hose burst
Pressure in cas-
ing too high.
Occluded pump
discharge
u
Use the Verder recommended
ATEX rated hose burst sensor
EN 80079-36:2016 10
EN 80079-37:2016 5
EN 80079-37:2016 6
–
Housing vent blocked
Pressure in cas-
ing too high.
u
Clean regularly
EN 80079-36:2016 10
– Dust collection on
horizontal surfaces
May cause over
temperature.
u
Unlikely on pump casing be
-
cause of its geometry
u
Regular maintenance to help
ensure all surfaces remain
clean
EN 80079-36:2016 10
Table 9 Ignition Protection (continued)
