INOXPA HLR, Installation, Service And Maintenance Instructions

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(A) 2021/11 7.Maintenance 17
7.3. CLEANING
7.3.1. Manual cleaning
The use of aggressive cleaning products such as caustic soda and nitric acid may give rise to skin
burns.
Use rubber gloves during the cleaning process.
Always use protective goggles.
7.3.2. Automatic CIP (cleaning-in-place)
If the pump is installed in a system fitted with a CIP process, there will be no need for stripping.
The recommended minimum liquid speed for an effective process of cleaning is 1,8 m/s (minimum Re > 100 000 at 1,0~2,5
bar).
It is recommended to run the pump during the CIP process (rotation speed ~ nominal speed at 50 Hz).
If it is not fitted with an automatic cleaning process, strip the pump pursuant to the instructions given in the section entitled
Stripping and Assembly of the pump.
Cleaning solutions for CIP processes.
Only use clear water (chloride free) to mix with the cleaning agents:
a) Alkaline solution: 1% in weight of caustic soda (NaOH) to 70ºC (150ºF)
1 kg NaOH + 100 l. water = cleaning solution
or
2.2 l. NaOH to 33% + 100 l. of water = cleaning solution
b) Acid solution: 0.5% in weight of nitric acid (HNO
3
) to 70ºC (150ºF)
or
0.7 litres HNO
3
to 53% + 100 l. water = cleaning solution
Monitor the concentration of cleaning solutions; it could give rise to the deterioration of the pump
sealing gaskets.
These solutions are given as examples and should be validated before use on an application.
In order to remove any remains of cleaning products, ALWAYS rinse the element in question with clean water after completing
the cleaning process.
7.3.3. Automatic SIP (sterilization-in-place)
The process of sterilization with steam is applied to all the equipment including the pump.
Do NOT start the pump during the process of sterilization with steam.
The parts/materials suffer no damage if the indications specified in this manual are observed.
No cold liquid can enter the pump till the temperature of the pump is lower than 60°C (140°F).
A flow by-pass is recommended to be used in order to assure the flow of sterile product after the
pump.
Maximum conditions during the SIP process with steam or overheated water
a) Max. temperature: 140°C (284°F)
b) Max. time: 30 min
c) Cooling: Sterile air or inert gas
d) Gasket materials: EPDM / PTFE (recommended)
FPM / NBR (not recommended)