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Pneumatic chain hoist CPA ATEX
Units for operation in areas with potentially explosive gas/air or
steam/air atmospheres or explosive mist
In areas subject to explosion hazards from fl ammable gases or liquids,
the ignition temperature (the lowest temperature of a hot surface) must
not be exceeded. In exceptional cases, the surface temperature must not
exceed 80% of the ignition temperature of the gas in degrees Celsius (°C).
Units for operation in dust/air atmospheres
In areas likely to carry explosive infl ammable dust, the surface tem-
perature must not exceed ⅔
of the dust/air mixture minimum ignition
point in degrees Celsius (°C). Temperatures of surfaces, which can be
subject to dangerous deposits of ignitable dusts, must be one safety
margin lower than the minimum ignition temperature of the layer which
can possibly be generated by the respective dust. This requires a safety
margin of 75 K between the minimum ignition point of a dust layer and
the surface temperature of the unit. If the dust layer exceeds a thickness
of 5 mm, larger safety margins are required.
The relevant key data of dust can be accessed via the GESTIS-STAUB-EX
database at www.dguv.de or taken from the HVBG/BIA report 12/97
“Combustion and explosion characteristics of dust” and be converted:
Starch/milk powder/gelatine
Ignition temperature 390 °C x ⅔ = 260 °C max. permissible
surface temperature
Wood/grinding dust
Ignition temperature 290 °C - 75 °C = 215 °C max. permissible
surface temperature
Classifi cation of the units
All important information for classifi cation of the CPA series can be
found in tables 4 and 5 on page 18 for the intended use in general
industrial applications.
The documents have been checked by a notifi ed body (0035) and
deposited at TÜV Rheinland Industrie Service GmbH,
Haumannplatz 4, D-45130 Essen.
EXPLOSION GROUPS AND TEMPERATURE CLASSES OF SOME GASES AND VAPOURS (SELECTION)
Explosion group
Temperature class
T1
T2
T3
T4
T5
T6
Ignition temperature range of mixtures
> 450 °C
> 300
≤
450 °C
> 200
≤
300 °C
Permissible surface temperature of the equipment
450 °C
300 °C
200 °C
135 °C
100 °C
85 °C
IIA
Acetone
Ethyl alcohol
Gasoline (general)
Acetaldehyde
Ammonia
i-Amyl acetate
Diesel fuels
Benzene (pure)
n-Butane
Jet fuels
Acetic acid
n-Butyl alcohol
Heating oil DIN 51603
Ethane
Cyclohexane
n-Hexane
Ethyl acetate
Acetic acid
Ethyl chloride
anhydrite
Carbon monoxide
Methane
Methanol
Methylene chloride
Naphthalene
Phenol
Propane
Toluene
IIB
Coal gas
Ethylene
Ethylene oxide
Ethylene glycol
Hydrogen sulphide
Ethyl ether
IIC
Hydrogen
Acetylene
Carbon disulphide
Fig. 2
