M&C TechGroup MP47-Z_Ex Operator's manual - Handbuch (Seite 34)

Diaphragm Pumps PJ19423-726 Use
Translation of Original Operating- and Installation Instructions, english, KNF PJ19423-726 02/13 6
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 classification of gases and vapors in groups with regard to
their explosion group and temperature class applies both to the
medium transferred and to the pump environment.
The pump may only be used to transfer gases and vapors which
belong to the explosion groups II A and II B and the temperature
class T4 (and below) (marked range in Tab. 5) or which are not
explosive.
The pump may only be operated in an environment which contains
an atmosphere belongs to the explosion groups II A and II B and
the temperature class T4 (or below) (marked range in Tab. 5) or
which is not explosive.
.
Transferred medium
Pump environment