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How UV Water Filter Systems work

How UV Water Filter Systems work

Our UV filtration systems offer a 1,2,3 or 4 filter configurations with a UV chamber attached normally at the top, occasionally at the side of the unit.

A UV filtration system can have either 1, to 4 filters depending a number of factors. If the water is very turbid then more filters are required to clean it and improve the water quality and clarity. Improving the clarity means that the UV can do a better job. The more the UV light penetrates the water the more effective it is and the better job it will do to sterilising the bacteria. Filter cartridges, often termed filter media trap and hold water contaminants and floating particles. There are many different filter media for different water issues. The filters include;

  1. A first or primary filter at the inlet is designed to remove larger sands, sediment, mud particles and leaf fragments and would normally be a 50, 20 or 5 micron pleated paper. This surface or synthetic cartridge can cope with most water sources.
  2. The secondary cartridge on a 3 filter system usually comprises of a coconut carbon block filter cartridge. Principally this is designed to address issues of taste, smell, discolouration and potentially any chemicals present, like spray pesticides.
  3. The last or 3rd filter comprises of a 1 micron melt blown poly prop depth filter. This eliminates very fine sediments and is often referred to as a polishing filter.

The 3 or 4 filter cartridges (or media) are designed to remove and hold filtered contaminants. After about 6 to 12 months the filters will be unable to store further material and will require to be changed.

The UV sterilisation process..

  1. After the water has been cleaned by the filter media process it will enter the UV chamber.
  2. The UV chamber is a long stainless steel tube within which is a quartz sleeve. The UV lamp sits in this quartz sleeve.
  3. The clean filtered water enters the chamber within the gap between the quartz sleeve and the larger inner chamber wall.
  4. The water spirals around the outer quartz sleeve. As it is agitated it is exposed to the intense UV light shining through the sleeve.
  5. Each systems has been carefully designed to ensure that the complicated formula for sterilisation is correct. The formula includes water turbidity (clarity) chamber length, width, water flow, lamp wattage and exposure time.
  6. The intense UV light radiates through the water changing its DNA thereby rendering the bugs harmless as they are no longer able to multiply. The water is therefore safe for household use.

The correct water filtration and UV sterilisation system for you will be determined by many factors and will require a detailed discussion prior to your investment