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NT 1004-C00 03 18 SLC12 i - SLC18 i - SLC12 i HT - SLC18 i HT e
4. CLEAN IN PLACE (CIP) &
STERILISATION IN PLACE (SIP) (continued)
It is preferable not to run the SL Series pump during CIP,
although low speed (< 100 rpm) is acceptable by alter-
nating start/stop operation.
• In certain cases, the cleaning pressure required for the
installation is higher than 3 barg (43,5 psig). 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 SL pump to ensure a maximum pressure of 3 barg
(43,5 psig) at the SL pump inlet.
It is preferable not to run the SL Series pump during CIP
although low speed (< 100 rpm) is acceptable by alter-
nating 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 SL
Series pump does not rotate. Under these conditions,
with the pump completely stopped, the pressure of the
washing circuit can rise up to 6 barg (87 psig).
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 SL 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
SL Series pump will be acting on a product with generally
few lubricating properties. This will contribute towards
wear of the pump.
The CIP centrifuge pump must never be installed in
parallel with a SL Series pump without taking special
precautions.
Indeed, in this case, the pressure at the inlet of the
SL Series pump is lower than the pressure at the
discharge and the piston remains forced against the
cylinder. Therefore, there the SL Series pump no longer
provides a passage. Its efficient cleaning can no longer be
ensured and the cylinder/piston pair will become prematu-
rely 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 SL Series pump.
In this case, the SL Series pump cleans itself.
Cleaning the pump :
We recommend limiting the rotation speed of the SL Series
pump.
Cleaning the installation :
The SL Series pump is stopped when cleaning the ins-
tallation.
SLC pump
Max pressure
3 barg
(43,5 psig)
SLC pump
Max pressure
3 barg
(43,5 psig)
SLC pump
Max pressure
6 barg
(87 psig)
CIP pump
SLC pump
SLC pump
Max pressure
1,5 barg
(21,7 psig)
SLC pump
