UV STERILIZERS

STERILIZATION EQUIPMENTS

The small part of electro-magnetic spectrum having wave lengths included between 100 and 400

nm (thousandths of micron) is defined as the space of the ultra-violet irradiation. The UV-C are

part of the subspace characterized by the wave lengths included between 100 and 280 nm.

Electro-magnetic waves with different wave length and width induce interactions with the matter

of different nature; the UV-C irradiation with L = 254nm is particularly interesting thanks to its

marked germicidal power.

The high germicidal power of this wave length must be sought in DNA and in the link of its

fundamental components (nucleotids). DNA is a macromolecule present in all living organisms

in which all information necessary for life and reproduction reside. The alteration, induced by the

UV-C irradiation, of some chemical links present among nucleotids is able to change the

information contained and conveyed by DNA, these alterations prevent its normal activity and this

irreversibly leads to the cellular death.

For being effective in the disinfection, an electro-magnetic wave, besides being of a certain kind

(L = 254nm) it must possess also a minimum value of intensity to be able to ensure a minimum

dose to water. A UV sterilizer, if correctly sized, is able to give water a dose sufficient for reducing

almost all the commonest micro-organisms present in water. Normally a UV disinfection system

must have a UV dose higher than 300 J/m2.

UV-C rays are produced with the help of special fluorescent lamps containing mercury fumes,

these lamps are made of a very pure quartz (>99.99% SiO2) transparent to the UV-C light which

they emit in an almost monochromatic form (>95% of L = 254nm).

A/C PLUG WITH TRANSFORMER

TREATMENT CHAMBER

CONNECTION COVER CAP

QUARTZ COVERING

UV LAMP

COVERING HOLDER

334 | water treatment systems

SCHUCO

53

OUT (1/8”)

BOLT M4

for earthing

connection

øe 40

IN (1/8”)

SCHUCO

90

OUT (1/2”)

BOLT M4

for earthing

connection

øe 60.3

IN (1/2”)

OUT (1”)

øe60.3

IN (1”)

UV 300 AL

UV 600 AL

*

earthing connection

UV 2800 LCD

UV 1200 LCD

90

øe60.3

IN (3/4”)

ELECTRICAL PANEL

OUT (3/4”)

90

9

5

1

6

0

2

8

2

8

4

1

5

5

2

4

2

8

2

6

7

1

8

2

8

5

2

8

3

9

4

8

1

6

9

2

5

2

8

2

8

200