Keofitt W9 - 4. EVERYDAY USE OF THE VALVE; 4.1 Batch change cleaning; 4.2 Chemical cleaning, CIP; 4.3 Chemical Disinfection

KEOFITT W9 USER MANUAL V.4 PAGE 17
4. EVERYDAY USE OF THE VALVE
This chapter gives an introduction to how the sampling valve works in dierent operating conditions,
such as the cleaning of the entire production line before starting a new batch (chapter 4.1) and the
cleaning of the valve between each sample during the batch production (chapters 4.2-4.4)
For specic operator instructions please refer to the chapter 5. “VALVE OPERATIONS”.
4.1 Batch change cleaning
Before every new production batch the sampling valve is cleaned and disinfected/sterilised together
with the tank or vessel or the entire production line.
Make sure the valve is in its OPEN position during the initial line CIP to allow cleaning of the valve seat
and the membrane contact surface.
Also allow CIP uid, disinfectant or steam to ow through the inlet and outlet hose pieces. If the valve
is tted to a tank, which is spray cleaned there will be insuicient ow of CIP liquid through the valve.
Therefore connect CIP hoses to the two ports for CIP uids to ow through the valve into the tank (see
illustration below).
If the valve is tted to a pipe there will usually be enough pressure and ow during the CIP process for
the CIP uid to ow through the valve.
PIPE TANK
Remember to close the valve aer the nal rinse and prior to starting up the next production batch.
4.2 Chemical cleaning, CIP
During production and prior to sampling, cleaning takes place with the valve closed and involves the
following stages:
1. Pre-rinse
Flushing with water to mechanically remove product residues
2. Clean
Applying a detergent to remove remaining visible product residues
3. Final rinse
Rinse with clean water to remove all traces of detergents
Usually this procedure is followed by disinfection (see below), but for some application CIP might be
suicient. It depends on your (microbiological) requirements, the detergents applied and the process
media to clean for. Consult your supplier of CIP uids.
In some cases where the process media is for instance water, CIP might not even be necessary and you
may go directly to disinfection.
4.3 Chemical Disinfection
Disinfection takes place with the valve closed and involves the following stages of which the rst 3 are
identical to CIP:
1. Pre-rinse
Flushing with water to mechanically remove product residues
2. Clean
Applying a detergent to remove remaining visible product residues