Keofitt W9 User Manual

KEOFITT W9 USER MANUAL V.4 PAGE 11
The company Novadan ApS, Kolding, Denmark has supplied the table below, as a preliminary indication
of which type of disinfectant to use:
Disinfectant
Microbes to inactivate
Halogenes
(Clorine)
Peroxides
(hydrogenperoxid &
peracetic acid)
Alcohol (70%)
Gram-neg bacteria
Salmonella
Campylobacter
E. Coli and others...
Gram-pos bacteria
Listeria
Bacillus cereus
Clostridium and others...
Bacteria spores
Bacillus cereus and others...
Bacteriophage
Yeast
Fungi
Virus
Legend: Eicient Limited eect Little/No eect
NOTE! The nal choice of detergent, disinfectant and method lies with the user, supported by the
supplier of the CIP uids and disinfectants, as it is very much dependant on individual concerns
and circumstances.
2.3 Sterilisation
Sterilisation is a high-level disinfection designed to render the valve free of all forms of viable
microorganisms (incl. bacterial spores) to a high level of certainty; the so-called Sterility Assurance Level
or SAL. A SAL value of 10-
6
means that the probability (or risk) of a single viable microorganism being
present on the valve interior aerwards is only 1 in 1,000,000 which is a generally accepted level for
calling an item sterile. Although the probability can be reduced to a very low number, it can never be
reduced to zero.
Sterility may in practise only be obtained by steaming. Disinfectants exist that in high concentrations
and for a prolonged exposure time will be able to inactivate all forms of microorganisms and render the
valve interior sterile with a high probability; these disinfectants are called chemical sterilants. However,
the application of chemical sterilants is most oen problematic due to a) a required high concentration,
which causes an operator hazard and b) the several hours of exposure time.
NOTE! Furthermore, sterilisation with a chemical sterilant may not convey the same sterility as-
surance as sterilisation with steam, because the germicidal and sporicidal kinetics are much less
investigated and documented for chemical sterilants compared to steam.

Keofitt W9 Specifications

General

Brand	Keofitt
Model	W9
Category	Control Unit
Language	English