 
Sometimes it is more economical to repair the worn parts than
to buy new ones. In addition to that in many cases the delivery
time for the new parts from the pump factory can be too long.
Typical parts to be repaired are casings, impellers, casing
covers, shafts and bearing brackets. There are many different
repair methods available depending on the object and grade of
the failure. We can use welding, thermal coating and different
types of composites.
You can enlarge the pictures by clicking
the thumbnails.
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The raw oil pump volute casing was badly
worn and we repaired it by welding with special electrodes.
The raw oil can go very deep into the base material and
the pores at the volute surface are many times invisible
and difficult to find out.
The repair work has many stages like machining, heat treatments
and sandplasts. Repair is much cheaper than to buy a new
casing. |
Sometimes we don't know the original measures and then
the impeller and the side plate are repaired and machined
so that they fit together like a pair. The side plate
in the picture has been coated with AlTiO in order to
protect it from abrasion. |
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Worn impellers and side plates are filled with the base
material and the surface is coated by using high-alloy
powders. The method suits particularly for parts unable
to be repaired by welding because of distortion caused
by the high temperature. |
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The impellers of MC-pumps are very expensive
and the repair of them is profitable to the customer even
when all inducer vanes are destroyed and vanished. The
repair does never cost more than the half of the price
of a new impeller. Normally the surfaces of the vanes
are coated with AlTiO in order to protect base metal from
abrasion. |
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The repaired impeller is like a new one.
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| The slurry pump volute casing was badly
worn and there were already big holes in many places.
We repaired it with composites at half the cost of a new
volute and with egual or better life expectancy. The smoother
surface improves the flow and gives better efficiency. |
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