
12 UNIBLOC-PD Operation & Service Manual: PD600-677
4.0 Maintenance
BEFORE ANY MAINTENANCE TAKES PLACE: TURN OFF POWER SUPPLY TO THE MOTOR.
4.1 Clean In Place, CIP
The pump can be manually cleaned or by Cleaned In Place (CIP). The following is an example of suggested CIP pro
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cedure. However, specific advice for each application can be obtained from your pump supplier.
If the temperature difference between the process liquid, or the pump, and the cleaning media is greater than 10º C
(18º F), stop the pump and then introduce the cleaning liquid. If the liquid is not gravity fed and the pump must draw
the liquid from a supply vessel, run the pump until it is filled and then stop. Allow the pump to adjust to the cleaning
liquid temperature and then continue running the pump at normal speed. If the pump has double mechanical seals,
they must be continued to be flushed during the CIP process. The length of time necessary to clean the pump and the
type of liquid used is dependent on the type of process liquid and its characteristics.
Never touch the pump or the pipelines as they can be extremely hot.
Always use rubber gloves and protective goggles if handling caustic substances.
The rotors and shaft seals in the pump have been selected for specific temperature and pressure
conditions. Verify with Unibloc-Pump or the documentation supplied with the pump that the operating
parameters are not exceeded.
Always rinse well with clean water after using cleaning agent.
4.2 Steam In Place, SIP
The pump can be manually cleaned or cleaned with Steam In Place (SIP). Following is an example of suggested SIP
procedure. However, specific advice for each application can be obtained from your pump supplier.
Stop the pump and introduce steam into the system. If the pump must be operated, allow it to adjust to the steam
temperature and then run it between 50-100 rpm. If the pump has double mechanical seals, they must continue to be
flushed during the SIP process. The length of time necessary to steam the pump is dependent on the type of process
liquid used and its characteristics. After the SIP process is complete, allow the pump to return to ambient temperature
or to the temperature of the process liquid. Resume normal operation to remove condensate or to begin pumping
another media.
Never touch the pump or the pipelines as they can be extremely hot.
Always use rubber gloves and protective goggles if handling caustic substances.
The rotors and shaft seals in the pump have been selected for specific temperature and pressure
conditions. Verify with Unibloc-Pump or the documentation supplied with the pump that the operating
parameters are not exceeded.
Always rinse well with clean water after using cleaning agent.