6 Safety Throw sifter
DFTA-66620-2-en-1803 © Copyright 2018 Bühler AG
1.3 Designated use
The machine is designed solely for sieving animal feed and milling industry prod-
ucts. Any other use shall be considered noncompliant use.
1.3.1 ATEX authorisation
In areas where there is a risk of explosion, only machines and devices that are
approved for this purpose may be used (see identification plate).
If this symbol appears on the identification plate, the machine may be used in an Ex
zone.
This symbol is followed by the ATEX ID, which indicates the Ex zone in which the
machine may be used and the internal zone to which it may be connected.
Before machines with internal Ex zone can be connected to an installation, it must
be ensured on the installation side that no effective sources of ignition, metal parts
or stones can enter the machine from the installation.
Example:
2/3D means that the machine may be connected on the process side to an
Ex zone 21 and installed (used) in an Ex zone 22.
II 3/3D EEx c T=135°C x (Example)
Identifier for operating instructions
Maximum surface temperature to be expected in
normal operation at full load
Ignition protection class (if standard is applied)
D for dust / G for gas
External category
Internal category
Device group
Ex symbol
External category:
- = May not be installed in an Ex zone
* = Does not contain its own external source of ignition
1 = Conforms to ATEX category 1, connection to zone 20 or 0 is permitted
2 = Conforms to ATEX category 2, connection to zone 21 or 1 is permitted
3 = Conforms to ATEX category 3, connection to zone 22 or 2 is permitted
Internal category:
- = May not be connected to an Ex zone
* = Does not contain its own internal source of ignition
(A2) = (Assembly) with ignition protected devices conforming to ATEX category 2
1 = Conforms to ATEX category 1, connection in zone 20 or 0 is permitted
2 = Conforms to ATEX category 2, connection in zone 21 or 1 is permitted
3 = Conforms to ATEX category 3, connection in zone 22 or 2 is permitted
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