J. D. NEUHAUS Profi 025Ti, Руководство по эксплуатации

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powered by air !
P R O D U C T I N F O R M AT I O N
Page 10
G E N E R AL N OT E O N D E S I G N AT I O N
The highest possible respective designations for lifting
equipment and running gear are usually replaced by a
designation, which corresponds to the normal assembly
of a compact complete device (trolley or crane system).
A D D I T I O N AL M A R K I N G ” X ”
This designation refers to explosion protection details
in the operation manual.
II 2 GD IIA T4(X)/ II 3 GD IIB T4(X) or
II 3 GD IIA T4(X) :
This designation does not permit use in the presence of
the extremely flammable substances hydrogen sulphide
and ethylene oxide or in the presence of light metal or
other impact-sensitive dusts, or in the presence of dusts
with glow temperatures below 210° C or ignition
temperatures below 202° C. The permissible ambient
temperature range (Ta) extends from - 20° C to + 70° C.
II 2 GD IIC T4(X) or II 2 GD IIB T4(X) :
The permissible ambient temperature range (Ta)
extends from - 20° C to + 70° C.
...IIC T6(X) :
This designation permits use in the presence of carbon
disulphide or other temperature class T6 substances
only under special conditions, which have been agreed
with the manufacturer and which are described in the
crane documentation and which stipulate the maximum
surface temperatures for the device.
U SAG E I N M I N I N G A P P L I C AT I O N S
Standard versions of JDN Hoists, Trolleys and Crane
Systems may generally also be used for underground
mining operations as well as for the associated surface
facilities, which are hazardous due to firedamp and/or
combustible dusts. Within this equipment group I they
belong to category M2. The devices must be switched
off in the event of an explosive atmosphere being
formed. They are equipped with protective measures
offering a high degree of safety. The protective measures
with which products of this category are equipped
provide the necessary degree of safety for normal
operation as well as operation under difficult
conditions, in particular rough treatment and changing
environmental influences. For other difficult conditions
in addition to explosion protection prevailing with
regard to the general handling of the devices in mining
applications, special mining hoists are available from
J.D. NEUHAUS. The maximum permissible temperature
of 150° C in accordance with EN 13463-1
5
for coal dust
atmospheres is not reached. For mining applications,
the relevant designation for hoists, trolleys and crane
systems is
I M2 .
L OA D C H A I N
In order to guarantee the required degree of earthing,
extremely rusty chains must no longer be used in zones
1 and 21 or in category M2 devices. As, depending upon
the degree of corrosion, the leakage capability of the
chain may be impaired to a level that is no longer ade-
quate.
C O M P R E S S E D A I R H O S E S
In zone 1, compressed air hoses must have a sufficiently
low surface resistance of less than 10
9
, in order to
prevent electrostatic ignition hazards. Otherwise
(resistance >10
9
), for explosion groups I, IIA and IIB
the hoses must be
∅
30 mm and for explosion group
IIC
∅
20 mm, or proof must be provided that they
cannot become dangerously charged.
M AT E R I AL S F O R F R I C T I O N A N D I M PAC T H A Z A R D S
Friction and impacts can give rise to individual sparks
presenting a danger of ignition in the presence of
explosion group IIC gases, hydrogen sulphide, ethylene
oxide, or light-metal or other impact-sensitive dusts.
Accordingly, spark formation caused by mechanical
influences must be prevented. The chain and load must
always be moved in such a way that sliding and/or
frictional contact with other plants or components is
excluded. If circumstances do not permit this, it is
necessary to ensure an absence of explosive
atmospheres during operation.
Impacts between particular materials result in an
increased ignition hazard. This does not apply to
corrosion-resistant steel or cast iron against aluminium,
magnesium or corresponding alloys. This applies
especially in the presence of rust or rust film. Rust (also
rust film) formation is possible, especially on the chain
and on the load hook, at the friction points. The
following holds true for all zones: For the intended use
of hoists it must be ensured that no rust is present at
the above-mentioned friction points and that material
combinations of the above-named light metals with
steel (exception being stainless steel) or cast iron are
not used in the working area of the hoists, at potential