Keofitt W9, User Manual, Page: 23 / 50

KEOFITT W9 USER MANUAL V.4 PAGE 23
5.3 Steam sterilisation
Chemical CIP and chemical disinfection are usually not needed when using steam, as steam does it all.
An exception from this is with sugary substances, which caramelise and with substances containing
protein, which coagulate and burn; see chapter 2.1. In this case flushing with an appropriate fluid must
precede post-sampling steaming.
Steam sterilisation takes place with the valve remaining in its closed position. Perform the following
steps:
1. Remove the plugs from the hose pieces.
2. Connect the steam hose to the valve’s upper hose piece.
3. Connect a hose to the lower hose piece and let it go to drain.
4. Open the steam supply and let it flow through the valve for
sterilisation. Allow 1 minute at 121° C (1 bar(g)).
5. Close the steam supply, but leave the hose in place to prevent
contamination from the ambient during sampling. If removal of steam
hose is required, fit a sterile rubber or stainless steel plug onto the
upper hose piece.
The valve is now ready to take a sample. The sampling must be performed immediately after steaming to
avoid any contamination of the sample.
WARNING
• During sterilisation with steam the valve will become hot and care should thus be taken when
operating the valve
• The valve is designed for use in working conditions of up to 6-12 bar(g) pressure (depending on