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1.3
PUMP MAINTENANCE, SPARE PARTS AND DECOMMISSIONING
Maintenance must be done regularly according to periodic plan of review. The pump must operate quiet,
vibration-free, always filled with fluid.
This product and its components must be disposed of in an environmentally friendly manner. Use waste
collection services, if this is not possible, contact the nearest IMP Pumps Service or authorized repairers.
1.3.1 GENERAL MAINTENANCE
In case of damaged mechanical seal it is necessary to prevent penetration of the medium to the electric
motor, as it may permanently damage it. Other seals must also be inspected for leakage at mechanical
joints of pump housing and console. If leakage, wear or tear are noticed, it is required to replace the
seals.
When pump is not operational for long period of time it is advisable to switch on the pump, weekly for
5 minutes, following the instructions for commissioning.
Bearings check is more common in heavy operating conditions. Manufacturer of electric motors
provides lifetime for a minimum of 20,000 hours of operation. An expert or an authorized service center
must execute interference with the electric motor.
When original pump parts are mechanically damaged, it is necessary to call the authorized service
department or install original spare parts from the pump.
Dismantling the pump also takes place according to certain rules:
o
the shut-off valves on suction and discharge side must be closed,
o
turn off power supply,
o
fluid in the system must be cooled to a temperature that is not hazardous to work,
o
remove additional connectors at the pump,
o
unscrew screws between pump housing and the console and separate them,
o
when pump housing is damaged, unscrews flanges and separated whole pump from piping
system,
o
when having too much of a corrosive action on the contact lines use anti-corrosive agents to
remove rust.
1.3.2 MECHANINCAL SHAFT SEAL
Leaking water between the console and the mechanical shaft seal is a sign that it must be completely
replaced. When removing, be careful not to damage the bearing surfaces and seats, in which the
mechanical seal is fitted. In case of damage to the parts that are functionally important for the sealing,
it is also necessary to replace this with the original parts of the manufacturer.
Before re-installation of the mechanical seal is necessary to clean all contact surfaces of dirt and grime,
It is necessary to control the installation dimensions, as well as the final dimensions of seals, coaxiality
of the shaft and the console. Shafts must be machined within the limits of Ra ≤ 2.5 µm, console Ra ≤ 0.8
µm. For drawing, please contact the manufacturer of the pump.
All part edges and surfaces that encounter with the mechanical seal must be burred or curved (eg. 2/20°
or R1.5). Install pump in clean environment and with precaution. Flat surfaces must be cleaned, dried
and not polluted with oils.
Customize steps of installation or dismantling of the mechanical seal regarding to design of the pump.
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