The Cathelco Evolution system for yachts is based on a combination of filtration and UV technology. It has been specifically designed for luxury yachts with a very compact filter, shorter UV chamber and very small overall footprint. Its capacity has been tailored to the needs of yachts and it is ideally suited to treat flow rates in the range of 30-80 cubic metres per hour.


Filter unit

The Filtrex ACB filter has been specifically selected for its very compact size – less than half the size of filters used on commercial vessels. It has a filter mesh size of 20 microns and incorporates automatic back flushing.

Enhanced UV chamber design

The chamber has been re-designed to increase the level of irradiation to meet the ‘live/dead’ standard, whilst other improvements extend the exposure time with the sea water. In addition to creating a helix flow as the water enters the chamber, its path is interrupted to cause a lateral movement. This brings organisms from the edge of the flow into closer contact with the light emitted from the UV lamps in a repeating cycle as the water passes along the chambers.

3 UV intensity meters

UV intensity monitors are mounted on the edge of the UV chambers and measure the amount of light received during irradiation. If the amount of UV light falls below a prescribed level the automation control unit indicates that a cleaning cycle is required or that lamp renewal is necessary.

4 UVT sensor

The UVT sensor measures UV light transmittance through a sea water sample taken before it reaches the chamber. The sensor operates in conjunction with UV intensity meters in a feed-back loop ensuring that correct dosage is being achieved.

5 Cleaning In Place (C.I.P) system

The lamp sleeves are automatically cleaned after every ballasting/de-ballasting operation using an efficient wiper system.