GAS 222.20 Ex1
Passing through gases
Flammable gases above the UEL (upper explosion limit) may
only be blown back with inert gases. Flammable gases from
25 % LEL (lower explosion limit) and up to the LEL may be
blown back provided the operator ensures the blown back gas
is not and cannot be explosive. For safety reasons we recom-
mend only using inert gases in these cases as well.
Blowing back explosive atmospheres (range from LEL to UEL)
with the probes is prohibited due to possible adiabatic com-
pression (high blowback pressure against contaminated fil-
ter). The operator is responsible for compliance with these
conditions taking into account his risk assessment.
Limitations categories/zones due to accessories
Please note, the accessories used may limit the approved ap-
plications of the probes.
Please note the following table:
ATEX +
IECEX
Only ATEX
GAS 222
types
with accessories:
Gas
Dust
Gas and
dust
(separate
zones)
Sampling zone/operating
zone
11 Ex1,
21 Ex1,
30 Ex1,
31 Ex1,
35 Ex1,
35-U Ex1
Pressure vessel PAV 01
(item no. 46222PAV
and accessories)
Zone1***/
Zone 1
Zone 20/
Zone 21
Zone 20/
Zone 1
11 Ex1,
21 Ex1,
30 Ex1,
31 Ex1
Ceramic inlet filter*
(item no.:46
46222307F)
Zone 2/
Zone 1
Zone 20/
Zone 21
Zone 20/
Zone 1
or
Zone 2 /
Zone 21
11 Ex1,
20 Ex1,
21 Ex1
Ceramic outlet filter*
(item no. 46
46222026P)
Zone 2/
Zone 1
Zone 20/
Zone 21
Zone 20/
Zone 1
or
Zone 2 /
Zone 21
11 Ex1,
20 Ex1,
21 Ex1
Sampling tubes
(item no.: 46222001,
462220011, 46222006,
46222004, 46222016,
46222017, 46222018
Zone 0/
Zone 1
No zone/
Zone 21
Zone 0/
Zone 21
11 Ex1,
20 Ex1,
21 Ex1
Ceramic sampling
tubes**
(item no.:
4622200205,
4622200210,
4622200215)
Zone 2/
Zone 1
No zone/
Zone 21
Zone 2/
Zone 21
* Accessories not suitable for sampling highly ignitable dusts
with a minimum ignition energy (MIE) of < 3 mJ.
** When sampling gas from Zone 2, ceramic sampling tubes
may only be used if application- and process-related intensive
electrostatic charges are ruled out.
*** Blowback of explosive atmosphere/gases is prohibited.
1.2 Dust Atmosphere Requirements
The sample gas probe may only be used in areas with explos-
ive dust atmosphere if the smouldering temperatures of the
dust layers and the ignition temperatures of the dust atmo-
sphere is higher than the following temperatures.
Probe temperature class
T80 °C T120 °C T130 °C T175 °C T226 °C T300 °C
Smoul-
dering
temper-
ature
for
max. 5
mm
dust
layer
≥ 155 °C ≥ 195 °C ≥ 205 °C ≥ 250 °C ≥ 301 °C ≥ 375 °C
Dust at-
mo-
sphere
ignition
temper-
ature
≥ 120 °C ≥ 180 °C ≥ 195 °C ≥ 263 °C ≥ 339 °C ≥ 450 °C
The basis for safety factors is EN 1127-1.
1.3 Type Plate
Example:
0158
GAS 222.20 Ex1
000092697 462222010149420013111 001
Manufacturer and address
Model designation
Order no., item no.
Electrical supply
Type examination certificate no.
230V; valve/клапан 24V UC
Bühler Technologies GmbH
Harkortstr. 29 D-40880 Ratingen
IBExU17ATEX1088X
IECEx IBE 17.0024X
Ex eb mb IIC T4 Gb
Explosion protection marking
II 2G
IECEx certificate number:
Ex eb mb IIC T4 Gb
ATEX certificate number:
Explosion protection marking
1.4 Scope of delivery
• 1 x Sample gas probe
• 1 x Flange gasket and screws
• Product documentation
• Connection and mounting accessories (only optional)
2 Safety instructions
2.1 Important Information
This unit may only be used if:
• the product is being used under the conditions described
in the operating- and installation instructions, used ac-
cording to the nameplate and for applications for which it
is intended. any unauthorized modifications to the device
will void the warranty provided by Bühler Technologies
GmbH,
• the limits in the data sheet and the instructions must be
observed,
11
Bühler Technologies GmbH
BX460041 ◦ 03/2021
