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NT 1004-C00 09.09 SLC24 SLC36 e
4. CLEAN IN PLACE (CIP) &
STERILISATION IN PLACE (SIP) (continued)
It is preferable not to run the SLC Series pump during
CIP, although low speed (< 100 rpm) is acceptable by
alternating start/stop operation.
• In certain cases, the cleaning pressure required for the
installation is higher than 3 bar (43,5 psi). In this case,
the use of a bypass is required and cleaning is done
in 2 steps.
Cleaning the pump :
The cleaning flow should be limited during the cleaning
of the SLC pump to ensure a maximum pressure of
3 bar (43,5 psi) at the SLC pump inlet.
It is preferable not to run the SLC Series pump during
CIP although low speed (< 100 rpm) is acceptable by
alternating start/stop operation.
Cleaning the installation :
During this operation, the valve system used must ensu-
re that no flow can pass through the pump so that the
SLC Series pump does not rotate. Under these condi-
tions, with the pump completely stopped, the pressure of
the washing circuit can rise up to 6 bar (87 psi).
The pump must not run during this operation.
4.4 PUMPS ARRANGED IN PARALLEL
For applications where cleaning is easy and the differen-
tial pressure of, the SLC Series pump is lower than 2 bar
(29 psi) during this operation, assembly in parallel is
authorised. It should be noted that during cleaning, the
SLC Series pump will be acting on a product with gene-
rally few lubricating properties. This will contribute
towards wear of the pump.
The CIP centrifuge pump must never be installed in
parallel with a SLC Series pump without taking special
precautions.
Indeed, in this case, the pressure at the inlet of the SLC
Series pump is lower than the pressure at the discharge
and the piston remains forced against the cylinder.
Therefore, there the SLC Series pump no longer provides
a passage. Its efficient cleaning can no longer be ensured
and the cylinder/piston pair will become prematurely worn.
Authorised assembly :
As mentioned previously for applications where cleaning
is easy, assembly in parallel is authorised when the
valves are installed so that the cleaning pressure of the
circuit does not come into contact with the SLC Series
pump.
In this case, the SLC Series pump cleans itself.
Cleaning the pump :
We recommend limiting the rotation speed of the SLC
Series pump.
Cleaning the installation :
The SLC Series pump is stopped when cleaning the ins-
tallation.
SLC Series pump
Max P
3 bar
SLC Series pump
SLC Series pump
Max P
2 bar
SLC Series pump
Max P
6 bar
SLC Series pump
Max P
3 bar
CIP pump
SLC Series pump
