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8
EN
4
Function
The water to be treated flows upwards through the
stainless steel radiation chamber.
The UV lamp is located in a lamp protection tube
made of high-grade quartz with a high level of UV
transparency.
The UV lamp generates UVC rays at a wavelength
of 254 nm, which are particularly effective for dis
-
infection.
In general, disinfection means a 99.99 % reduction
in the pathogenic germs found in drinking water
(4 log levels).
Exposure to UVC light leads to a loss of the ability
of the micro-organisms in the water to multiply
(reproductive cell death), so they no longer pose a
danger to human health.
The optional sensor continuously monitors the
performance of the UV system and displaying the
output in % via a colour screen.
Bewades Blue UV systems are supplied ready
wired.
4.1
Design of UV units
UV unit design is primarily based on the following
parameters:
● Maximum flow (m
3
/h)
●
UV absorption of the water to be treated at
254 nm
Specified by SSK-254 nm (1/m) or UV transmittance
based on a defined layer thickness (e.g. %/cm).
4.2
Possible flow rates of the system
All BWT UV systems are rated for a specific flow
rate with water that meets the quality parameters
in chapter 12, Technical Specificaions. Please note
that increasing the flow above this rating or disinfec
-
ting water that does not meet the quality parameters
will decrease the dose and therefore compromise
the microorganism inactivation.
