Bühler technologies GAS 222.31 Ex1 Guía Rápida página 12

GAS 222.31 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:
GAS 222 with accessories:
types
11 Ex1, Pressure vessel PAV 01
21 Ex1, (item no. 46222PAV
30 Ex1, and accessories)
31 Ex1,
35 Ex1,
35-U Ex1
11 Ex1, Ceramic inlet filter*
21 Ex1, (item no.:46222307 +
30 Ex1, 46222307F)
31 Ex1
11 Ex1, Ceramic outlet filter*
20 Ex1, (item no. 46222026 +
21 Ex1 46222026P)
11 Ex1, Sampling tubes
20 Ex1, (item no.: 46222001,
21 Ex1 462220011, 46222006,
46222004, 46222016,
46222017, 46222018
11 Ex1, Ceramic sampling
20 Ex1, tubes**
21 Ex1 (item no.:
4622200205,
4622200210,
4622200215)
12 Bühler Technologies GmbH
ATEX + Only ATEX
IECEX
Gas Dust Gas and
dust
(separ-
ate
zones)
Sampling zone/operating
zone
Zone1*** Zone 20/ Zone 20/
/Zone 1 Zone 21 Zone 1
Zone 2/ Zone 20/ Zone 20/
Zone 1 Zone 21 Zone 1
or
Zone 2 /
Zone 21
Zone 2/ Zone 20/ Zone 20/
Zone 1 Zone 21 Zone 1
or
Zone 2 /
Zone 21
Zone 0/ No zone/ Zone 0/
Zone 1 Zone 21 Zone 21
Zone 2/ No zone/ Zone 2/
Zone 1 Zone 21 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- ≥ 155 °C ≥ 195 °C ≥ 205 °C ≥ 250 °C ≥ 301 °C ≥ 375 °C
dering
temper-
ature
for
max. 5
mm
dust
layer
Dust at- ≥ 120 °C ≥ 180 °C ≥ 195 °C ≥ 263 °C ≥ 339 °C ≥ 450 °C
mo-
sphere
ignition
temper-
ature
The basis for safety factors is EN 1127-1.
1.3 Type Plate
Example:
Manufacturer and address
Model designation
Order no., item no.
Electrical supply
Type examination certificate no.
ATEX certificate number:
Explosion protection marking
IECEx 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)
Bühler Technologies GmbH
Harkortstr. 29 D-40880 Ratingen
GAS 222.31 Ex1
000092697 462223110149420013111 001
230V; valve/клапан 24V UC
IBExU17ATEX1088X
II 2G
Ex eb mb IIC T4 Gb
IECEx IBE 17.0024X
Ex eb mb IIC T4 Gb
BX460051 ◦ 09/2023
0158