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• If the pump has a mechanical seal, follow the
instructions provided in the mechanical seals manual
to completely drain the liquid from all seal housings.
Prior to initiating the pump after installation and
alignment, commence with a preliminary inspection.
Remove the drain plugs from the pump and allow the
seal water line to be opened, enabling water to enter
the pump. It should be noted that prior to shipping,
the pump undergoes flushing with a water-soluble
preservative
to
prevent
transportation. Allow the water to flush out all traces
of preservative through the drains. Subsequently,
cease the supply of seal water and securely close the
drains using pipe thread compounds.
CAUTION!
There is a risk of slipping and falling due to escaping
Liquid. When draining the machine, it is essential to
use appropriate catch containers to prevent liquid
from spilling onto the floor or work area
Flushing: Regular cleaning is recommended to
remove any foreign bodies that may have accumulated
in the liquid ring. This can be done by temporarily
opening the valves in the drain linear unscrewing the
plugs for total draining during storage periods. Refill
the system with clean water for the flushing process.
Flush out dirt during running operation: If the
operating liquid becomes contaminated and there is a
possibility of erosive wear, it is important to pipe and
connect the end shield holes, closed by plug, to an
external discharge. It is recommended to use piping
with adjustable valves. The amount of drained fluid in
the lobe should be adjusted to ensure it does not affect
performance. The drained Liquid should be
compensated through the seal water supply.
Removal of lime deposits: If deposits of lime are
present, the machine needs to be treated with a
decalcifier as part of maintenance. The necessary
NBE O & M Document No. NES/NBE/O&M
any
seizing
during
.
intervals for decalcification depend on the lime
content of the operating Liquid. It is recommended
that the intervals are not less than half a year to avoid
material damaged calcification occurring at a high
rate, it is advisable to implement continuous
treatment for the machine.
Type: Recommended options include phosphoric
acid (in a solution of 15 parts acid to 17 parts water) or
ethanoic acid (in a solution of 20 parts acid to 100
parts water).
Filling Amount: The filling amount should
correspond to the volume of the entire machine. The
specific employed method should be selected based on
the resistance of the materials in the machine. Follow
the safety data sheets of the chemicals used and adhere
to local disposal ordinances. It is recommended to
have authorized personnel from NES Service conduct
the decalcification process. NES also recommends
contacting Dynamic Descaler to conduct the
descaling process.
WARNING!
When using compressed air for cleansing, ensure that you
take appropriate protective measures such as wearing
protective glasses and a protective breathing mask to
safeguard against potential hazards.
When utilizing chemical cleansers, it is crucial to adhere to
the warning and application instructions outlined in the
corresponding safety data sheets. Additionally, ensure that
the chemical agents employed are compatible with the
materials and components involved.
5.4 Preliminary Inspection
Conduct the following preliminary inspections prior
to initiating the pump:
WARNING!
Ensure all the following steps are performed in the
specified order to ensure personal safety and
equipment protection.
Page 13 of 43
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