Richter MPB 25-25-115 - Manual (Page 14)

Series MPB, close-coupled design Page 14
9240-050-en Revision 05
TM 7345 Edition 10/2008
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:
cover flange
housing flange
suction flange
discharge flange
drain flange
See also Section 6.1.1, para. 1.
Other inspections are to be performed regularly,
depending on 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.
The ingress of water into the bearing pedestal will
substantially impair bearing lubrication.
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, drained
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.
Richter has the following special tools for
dismantling in its range of delivery:
Clamping device
Ident. No. 9248-87-1091
Dismantling ring Ident. No. 9247-89-8002
For instructions on use, see Sections 10.2 and 10.3.
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.
7.6 Dismantling
Dismantling the complete pump from the plant.
Undo screwing 901/4 and 554/5 from transition
ring / lantern.
Pull motor 800/1 with transition ring 820 and also
hollow drive shaft 216 and drive magnet assembly
858 out of the slide-in unit.