Keofitt W9, User Manual, Page: 24 / 50

KEOFITT W9 USER MANUAL V.4 PAGE 24
choice of valve head). It is therefore important to be aware that the rubber plug (designed for
max. 3 bar(g)) or the steel plug (designed for 12 bar(g)) may be forced out at high speed, if not
seated properly
• For valve heads allowed under ATEX for Group IIGD, Category 2 (zone 1) both handle and top of
valve heads N and Q must be cleaned before use
• Always remember to wear safety goggles when steaming, CIPping, taking samples or any other
operations of the sampling valve
IMPORTANT
• Don’t attach a steam trap to the hose from the valve steam outlet (lower hose piece) as it will
impede the flow of steam and hence the flushing effect, and make the sterilisation dependant
on temperature only, demanding a much longer sterilisation time
• If the steam capacity is low and/or the outlet hose from the valve is short and/or with a large
diameter, the temperature will drop and condensation may occur in the valve chamber. In this
case a counter pressure must be established using a pressure relief valve or a needle valve at the
outlet
• Leave the steam 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
5.4 Sampling
Prepare a recipient for your sample.
For aseptic sampling use steam and a Keofitt Aseptic Sampling Bag (available in different sizes; please
see datasheet on www.keofitt.dk). Leave the steam hose in place to prevent contamination from the
ambient during sampling.
For all other sampling use a Keofitt Sterile Sampling Bag or a Spike Bag, which provides a closed flow
path for your sample protected against the ambient. Alternatives are bottles with a screw cap, jars or any
other available container. If removal of steam/CIP hose is required, fit a sterile rubber or stainless steel
plug onto the upper hose piece
Take the sample immediately after cleaning/disinfection/sterilisation performing the following steps: