Series RMA-B
close-coupled design
Page
16
9450-055-en
Revision 01
TM 9886
Edition 11/2018
7
Maintenance
7.1 Safety-relevant screw fittings
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
♦
draining flange
See also
Chapter 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
manufacturer.
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
Chapter 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
Chapter 9
and the components
available.
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.
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
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
20"(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
Chapter 7.6.2
.
