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Explosion protection
T1
I
Methane
IIA Acetone
Ethane
Ethyl acetate
Ammonia
Ethyl chloride
Benzene
Acetic acid
Carbon
monoxide
Methane
Methanol
Methyl chlo-
ride
Naphthalene
Phenol
Propane
Toluene
IIB Town gas
IIC Hydrogen
Transferred
medium
20
4.3.3 Explosion groups
Combustible gases and vapors are classified according to ex-
plosion groups(I, IIA, IIB and IIC) and temperature classes.
The following table shows the classification of the most com-
mon combustible gases and vapors.
T2
T3
–
–
i-amyl acetate
Gasoline
n-butane
Diesel fuel
n-butyl alco-
Jet fuel
hol
Heating oils
Cyclohex-
n-hexane
anone
1,2-
dichloroethan
e
Acetic anhy-
dride
Ethylene
Hydrogen sul-
Ethyl alcohol
fide
Acetylene
–
Tab.7:
The classification of gases and vapors into groups with re-
spect to explosion group and temperature class applies for
the transferred medium.
The device must only be used to transfer gases and vapors
that belong to the respective explosion group and the corre-
sponding temperature class (or lower), (see designation on
the type plate) or which are not explosive and not com-
bustible.
Translation of Originial Operating Instruction, KNF 325562-325564 02/23
Vacuum system SH820G / SR820G / SH840G / SR840G
T4
–
Acetaldehyde –
Ethyl ether
–
T5 T6
–
–
–
–
–
–
Carbon
disulfide
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