Series RMI-B
close-coupled design
Page
16
9430-005-en
Revision 03
TM 10456
Edition 06/2022
7
Maintenance
7.1 Safety related screw connec-
tions
After initial loading by the operating pressure and op-
erating temperature the tightening torques of all con-
nection screws must be checked at the following
points:
♦
housing flange
♦
suction flange
♦
discharge flange
♦
draining flange
See also
Section 6.1.1, para.
1
.
Other inspections are to be performed regularly,
depending on the operating requirements.
7.2 Motor
Observe the operating manual of the motor manufac-
turer.
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. Regularly turn the shaft by hand in the direction
of rotation.
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 shut down, drained and flushed
in accordance with the regulations?
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.
♦
Dismantling can be checked using the sectional
drawing in
Section 9
and the components availa-
ble.
7.5.1 Protective clothing
Even if the pump has been properly evac-
uated and flushed, residue of the medium
may still remain in the pump, e.g. be-
tween sealing surfaces or in the bearing
seats or in the can.
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
adapter 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 at-
tracted:
Risk of accident!
Place any tools needed at a safe distance.
Keep electronic equipment and measuring instru-
ments 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 6" (150 mm) should
be observed for watches, electric data carriers, data
carriers with magnetic strips etc.
7.5.3 Changing the motor
If the motor has to be changed, the pressure-bearing
section of the pump can remain in the plant.
For procedure, see
Section 7.6.2
.
