KNF AC Motor M 43 Ex
Use
Translation of original Operating and Installation Instructions, english, KNF 121218-121646 01/13
5
2.4.4. Explosion groups
Flammable gases and vapors are classified according to explosion
groups (I, IIA, IIB and IIC) and temperature classes. Tab. 5 shows
the classification of the most common flammable gases and va-
pors.
T1
T2
T3
T4
T5 T6
I Methane
–
–
–
– –
IIA Acetone
Ethane
Ethyl acetate
Ammonia
Ethyl chloride
Benzole
Acetic acid
Carbon monoxide
Methane
Methanol
Methyl chloride
Naphthalene
Phenol
Propane
Toluene
i-Amyl acetate
n-Butane
n-Butyl alcohol
Cyclohexanon
1.2-Dichloroethane
Acetic acid-
anhydride
Gasoline
Diesel fuel
Jet fuel
Heating oil
n-Hexane
Acetaldehyde –
–
IIB City gas
Ethylene
Ethyl alcohol
Hydrogen
sulfide
Ethyl ether
–
–
IIC Hydrogen
Acetylene
–
– –
Carbon
disulfide
Tab. 5
The motor may only be operated in an environment which contains
an atmosphere which is not explosive or belongs to the explosion
groups II A, II B or II C and the temperature class T4 (or below)
(marked range in Tab. 5).
2.4.5. Types of protection
Marking
Description
d Flameproof
enclosure
e Increased
safety
i Intrinsic
safety
p Pressurization
m Encapsulation
o Oil
immersion
q Sand
filling
nA Non
sparking
nC Several
meanings
nR
Vapor proof housing
nL Energy-limited
(varies between North America and Europe)
nP Simplified
pressurization
Tab. 6
Motor environment
