Installation and Operating Instructions
Model
ICM, ICMP
,
oil bath lubrication
9330-051-en
Revision 14
TM 6099 MPE/Wm
Page 7
Date 24/08/2011
2.3 Conversion
work and produc-
tion of spare parts by the cus-
tomer
Conversion of or changes to the machine are only
admissible after consultation with the manufacturer.
Original spare parts and accessories authorised by
the manufacturer serve to enhance safety.
The use of other parts may annul the liability for any
resultant consequences.
2.4 Inadmissible modes of opera-
tion
The operational safety of the machine supplied is only
guaranteed if it is used properly in accordance with
Section 1.1
of this operating manual.
The operating limits specified in the data sheet must
under no circumstances be exceeded.
2.5 Explosion
protection
If the units are used in potentially explosive areas, the
measures and notes in
Sections 2.5.1 to 2.5.8
are
imperative to guarantee the explosion protection.
2.5.1 Filling the unit
During pump operation the wetted interior of
the pump must always be filled with the liquid
medium.
This prevents any explosive atmosphere and the risk
of dry-running.
If the customer cannot ensure this, we rec-
ommend that appropriate monitoring facilities
be provided.
All auxiliary, heating and cooling systems
must also be carefully filled.
2.5.2 Special operating conditions
In the standard design the can chamber and
the plain bearings are cooled and lubricated
by a flushing flow.
The cooling flow may be interrupted and an inadmis-
sible rise in temperature may occur due to properties
of the liquid (e.g. sticking, possibly by an inadmissible
ingress of solids, clogging, ingress of gas etc.). Ap-
propriate monitoring facilities are to be provided. See
Section 5.6
.
For safe pump operation, we recommend a flow rate
of 0.3 to 1.1 Q
opt
. If the pump is operated outside this
range, it must be ensured that the max. admissible
flow rate according to the pump characteristic curve is
not exceeded and that the max. admissible operating
temperature according to
Section 2.5.6
is observed.
If the cooling flow is too low or there is none at all, this
may lead to an inadmissible rise in temperature on the
metallic can owing to eddy current losses.
If the flow rate is too high, the differential pressure
upstream and downstream of the plain bearings could
fall so much that a lack of lubrication or dry-running
may occur.
If the flow rate is too low, the medium may heat up so
much owing to the fluid friction that the max. admissi-
ble surface temperature of the relevant temperature
class is exceeded.
Overloading, overheating, non-observance of the de-
sign data or the incorrect selection of the magnetic
drive can lead to the decoupling of the inner and outer
magnet assemblies. As a result, eddy currents are
induced on the can and the inner and outer magnet
assemblies and an inadmissible rise in temperature
may occur.
The situation is to be remedied by providing appropri-
ate monitoring facilities. See
Section 5.6
.
The plant NPSH value (NPSHA) should be 0.5 m
higher than the NPSH value of the pump (NPSHR) to
prevent a lack of lubrication or dry-running of the plain
bearings.
2.5.3 Identification
The identification on the pump relates to the pump
section. A separate declaration of conformity must be
provided for the shaft coupling and motor and for
other attachments as well as corresponding identifica-
tion.
Example of the identification of the pump section:
CE Ex II 2 G/D T1-T... .
The identification indicates the theoretically available
range of the temperature classes. The admissible
temperature depending on the pump design are de-
rived in accordance with
Section 2.5.6
. The same
applies to the drive.
For an overall unit (pump, coupling, motor) with vari-
ous temperature classes, the lowest class in each
case applies as follows :
Example 1 : Pump
T3
, motor
T4
, coupling
T4
T3
applies, i.e. the unit may only be used in atmos-
pheres which may ignite at temperatures <200 °C
(+ safety margin). The maximum medium temperature
of the pump for this example is 175 °C (see table in
Section 2.5.6
).
Example 2 : Pump
T4
, Motor
T3
, coupling
T4
T3
applies, i.e. the unit may only be used in atmos-
pheres which may ignite at temperatures <200 °C
(+ safety margin).
Содержание ICM
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