Series MNK-B,
size 25-25-100
Page 15
9230-056-en
Revision 14
TM 9542
Edition 06/2016
7
Maintenance
7.1 Screw connections of the
housing
After initial loading by the operating pressure and
operating temperature the tightening torques of all
connection screws must be checked at the following
points:
housing flange
suction flange
discharge flange
See also
Section 6.1.1, para. 1
.
Further checks are to be conducted at regular
intervals in line with the operating requirements.
7.2 Motor
The operating manual of the motor manufacturer must
be observed.
A motor with a valid ATEX certificate is to be
used if employed in zone 1 and 2.
Observe the ATEX notes of the motor manufacturer.
7.3 Cleaning
Care must be taken when cleaning the pump to
ensure that it is not exposed to a strong water jet.
7.4 Stand-by pumps
If a pump is on stand-by, it is to be started up from
time to time.
This operation is to be performed more often for
pumps which are exposed to very strong vibrations
from the plant.
When dismantling the pump from the plant, drain it,
thoroughly clean it, seal with flange covers and store
in accordance with the instructions.
7.5 Notes on dismantling
All repair and maintenance work is to be performed
by skilled staff using appropriate tools and original
spare parts.
Is the necessary
documentation
available?
Has the pump been taken out of operation,
evacuated and flushed correctly? See also
Section 6.3.
If no new assembly is performed immediately after
dismantling, the plastic and ceramic components in
particular must be stored carefully.
7.5.1 Protective clothing
Even if the pump has been properly evacuated and
flushed, residue of the medium may still remain in the
pump, e.g. between sealing surfaces or in the bearing
seats or in the can or the can insert.
Plastic components may absorb medium
which gradually emerges from the material
after flushing.
Proper protective clothing is to be worn.
Protective clothing is also to be worn even if only the
bearing pedestal is to be removed. Medium may
penetrated the lantern chamber through the can.
7.5.2 Magnetic fields
Caution ! Strong magnetic fields
Risk during dismantling and in the vicinity of
magnetic drives as single parts.
Remove loose parts and other magnetisable metals
from the work bench. They could otherwise be
attracted: Risk of accident!
Place any tools needed at a safe distance.
Keep
electronic
equipment
and
measuring
instruments at a distance. In cases of doubt consult
the equipment manufacturer.
Hold magnetic drives as single parts firmly or secure.
Otherwise they could be attracted, for example, by a
vice: Risk of accident!
People with an artificial pacemaker
Keep torso
at a minimum distance of
500 mm
.
For safety's sake, a distance of 150 mm should be
observed for watches, electric data carriers, data
carriers with magnetic strips etc.
