IMP Pumps CL, CLD, CB - Manual (Page 20)

-20-
GB
7. Maintenance, dismantling,
damage to seals, spare, and
composite parts
7.1 Maintenance
• Maintenance must be done regularly
according to the periodic plan of
reviews. The pump must operate
calmly, without tremors, and always
filled with medium.
• Operating the pump at ambient
temperatures higher than 40°C is not
recommended. The temperature of the
bearing (the external side of the bearing
carrier) must not exceed 90°C. The
maximum temperature of the medium is
given in the technical details on the
display plate of the pump.
• With damaged mechanical seals, care
should be taken that the medium does
not penetrate to the electric motor, as it
can cause permanent damage. It is
necessary to inspect the other seals
(sheets, seal), and watch for the
occurrences of leaks at the contacts.
When the seals are worn out, they need
to be replaced.
• If the pump remains idle for a longer
period, it is recommended to start-up
the pump for 5 minutes weekly
according the same instructions as for
the initial start-up.
• The inspection of bearings should be
more frequent in adverse operating
conditions. The manufacturer foresees
a minimum of 20000 hours of operation.
Interventions to the pump must be done
by a professional or maintenance
service.
• With mechanical damage to the
original parts of the pump, it is
necessary to call an authorised service,
or install spare parts from the
manufacturer of the pump.
Dismantling the pump is also
implemented according to certain rules:
• The lock valves on both the pressure
and suction sides must be closed.
• The electrical supply must be
switched off.
• The medium in the system must be
cooled to a temperature that is not
dangerous for work.
• Additional connections to the pipe
should be removed.
• The screws between the pump
casing and the driving generator
should be unscrewed and the two
separated.
• With damage to the pump casing,
loosen the screws on the flanges of
the piping and separate the entire
pump from the system.
• With excessive corrosion on the
connection contacts, apply any
anticorrosive agent for removing rust.
7.2 Damage to seals
Damage to the mechanical seal is a
sign that it should be replaced entirely.
During dismantling care should be
taken not to damage the contact
patches and seats were the mechanical
seal is fitted.
• If there is damage to parts that are
functionally important for the sealing
of the mechanical seal, it is necessary
to change them with the original
manufacturer’s parts. Before re-fitting
the mechanical seal, all contact
surfaces should be cleaned from dirt
and impurities.
• It is necessary to control the
installation measurements, as well as
the seal measurements, centreline,