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Installation, operation and maintenance instructions
High voltage flameproof motors for explosive atmosphere
AMD Rg 355-400-450-500
Cleaning operations on mechanical parts
Issued by: MOLM
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Sheet No.
3AAM101045 E
Rev. B
Page 2 of 2
01.2023
Cleaning agents
Only the agents permitted by the manufacturer are to be used for wet cleaning.
Industrial benzene
(non-halogens, low volatility, inflammable) =
Standard cleaning agent
Properties (from delivery specification)
Density
0.78 … 0.8 g/cm³
Boiling range
135 … 200°C
Abel-Pensky flash point
21°C
-
Danger class to DIN 51755
: A II
-
CEA Classification
: Fe II B
-
Swiss toxicity class
: 4 … 5 depending on aromatic content
Xylene CHR
(chemically pure) =
Special cleaning agent
(non-halogens, medium volatility, inflammable)
Properties (from delivery specification)
Composition
Mixture of o-, m- and p-dimethylbenzol
Density
0.864 … 0.872 g/cm³
Boiling range
137 … 143°C
Abel-Pensky flash point
20 … 25°C
-
Danger class to DIN 51755
: A I
-
CEA Classification
: FE II B Fu
Other comparable and permissible products and suppliers:
Supplier
Trade name
Boiling range
°C
Flash point
°C
Evaporation no.
(ether = 1)
Aromatic content
%
Shell
Sangajol
154-201
35
75
35
Exxon
Varsol
155-185
38
55
18
BP
White Spirit 35
150-200
40
60
35
Mobil Oil
White Spirit
157-196
41
-
18
Chevron
White Spirit
162-196
35
75
35
Valvoline
White Spirit
160-200
40
60
25
Castrol
White Spirit
155-187
38
55
18
The following cleaning agents are not allowed !
Trichloraethane
(halogens, incombustible)
Trade names:
Clorothene, Genklene, Solvethane, Baltane.
When ignited from an extraneous source the above
release highly toxic, corrosive decomposition by
products. Their use in electrical machines is
therefore strictly prohibited.
Trichloroethylene, perchloroethylene
(halogens, incombustible)
The same disadvantages as trichloroethane, plus
higher toxicity. Not released by health authorities.
Swiss toxicity class: Trichlo. 4, Perchlo.5
“Safety” solvents
Trade names:
Pentex 77, SS 26
Turco-Solv, Diluan T, Disolver
Gamlen-Solvent 26
Inner-El-Mot-Cleaner, etc.
The claim to additional safety is mainly based on the
higher flash point of these products. Since they also
dry very quickly however, consumption rates are
appreciably higher, resulting in heavier
contamination of the work-shop atmosphere. All
“safety” solvents contain varying proportions of
halogens solvents and therefore are not to be used
for the same reasons.
Fluorinated solvents
(halogens, incombustible)
Trade names:
Freon-TF (Du Pont)
Flugene (Rhone-Poulenc)
General use of these products is strictly
prohibited. They may only be used in special
cases by qualified specialists.
Non-halogens, volatile solvents
Examples:
Acetone, Nitro-thinner, Volatile benzene
Use of these products is prohibited, on account of
the fire and explosion hazard.