Explosion Protection - HADEF 238/10-EX Installation, Operating And Maintenance Instruction

 Surface temperature of the units may increase due to environmental circumstances. Therefore the
surface temperature should be monitored.
 Avoid inflammable dust deposits.
 Remove dust deposits daily before commencing work and ensure that dust cannot settle between
moving parts.
 Never remove dust with compressed air - remove it with a wet bolt of cloth.
 Please observe the prescribed intervals.
 Assembly and maintenance work must only be carried out in an atmosphere not prone to explosion.
 Check fat of the bearing regularly.
 Change friction linings in time.
 Protect the device from impact, friction, rough handling and moisture.
Special scope
Use of different EX-zones is depended from the EX-classification of the unit. Find the EX-classification on its
type plate.
2.6

Explosion protection

The EX classification belonging to the unit is indicated on the type plate, which is attached to the unit.
Example of ATEX classification:
CE-marking
explosion-proof operating material
II
device group / application
2
device category
G
EX atmosphere
Ex h
type of protection
IIB
explosion group II (gases)
Temperature class - gases
T4
(for dust only the temperature in °C
is stated)
Gb
EPL (equipment protection level)
5.52.208.01.01.02
Unit classified
in EX-classification
3G
3D
2G
2D
II 2 G Ex h
II
1
2
3
G
D
IIA
IIB
IIC
T1
T2
T3
T4
T5
T6
Ga
Gb
Gc
No use
in EX-zone
0,20,1,21,22
0,20,1,21,2
0,20,21,22
0,20,1,2
IIB
European Union
I danger of mine damp
other areas prone to explosion
for use in zone 0
for use in zone 1
for use in zone 2
...caused by gas, steam, fog
...caused by dust
for mechanical devices, including e. g.
"c" construction safety
"k" encapsulation of liquids
limit gap widths (MESG) > 0,9 mm
limit gap widths (MESG) ≤ 0,9 to ≥ 0,5 mm
limit gap widths (MESG) < 0,5 mm
limit temperature 450 °C
limit temperature 300 °C
limit temperature 200 °C
limit temperature 135 °C
limit temperature 100 °C
limit temperature 85 °C
e.g. Group II (for gases, vapours, mist):
level of protection: very high (complies with zone 0)
level of protection: high
level of protection: enhanced (complies with zone 2)
T4 Gb
(complies with zone 1)
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