2.
OPERATION
IOM manual CTI & CTH centrifugal pumps
14
2.2.
Stopping the pump
It is advisable to close the discharge shut-off / regulation valve gradually and stop the motor
immediately after. The reverse sequence is not recommendable, especially with larger pumps
or longer delivery piping. That is to avoid any problems due to water hammering. If a suction
shutoff valve has been installed, it is advisable to close it completely after pump is fully
stopped.
2.3.
Cleaning and disinfection
Cleaning and disinfection of the pump system is of greatest importance when the pump is
used in a food processing installation. Use of a pump system that is NOT cleaned or
disinfected can cause contamination of the product. The cleaning cycles as well as chemicals
to use for the cleaning vary depending on the pumped product and the process. The user is
responsible to establish a suitable cleaning and / or disinfection program according to local
and public health and safety regulations.
2.3.1.
Cleaning procedure
The pump may be cleaned in two different ways:
CIP (Cleaning In Place)
without dismantling the pump, using steam, water or cleaning chemicals. Follow these safety
instructions during the CIP procedure:
Make sure that all cleaning line connections are properly tightened to avoid splashing
of hot water or cleaning chemicals.
When using an automatic process, a safety device should be installed to avoid
unintentional automatic start-up of the pump.
Before any disassembly of the pump, fittings or pipes, make sure that the cleaning cycle
is finished.
Manual cleaning
by simply dismantling the pump casing, impeller and mechanical seal. Always follow these
safety instructions:
Switch off the electric power to the motor and disconnect the motor starting system if
installed.
The cleaning personnel shall wear suitable protective clothing, footwear and goggles.
Use a suitable non-toxic and non-flammable cleaning solution.
Always keep the area around the pump clean and dry.
Never clean the pump by hand with pump running.
