Cathelco BWM system receives AMS approval

The Cathelco system, which received IMO Type Approval, is based on a combination of filtration and UV technology and is completely chemical-free, including the cleaning method. The new AMS acceptance means the system can be used on vessels for a period of up to five years, while the system undergoes approval testing to Coast Guard standards.

“We are one of the few BWT system manufacturers using UV technology that has no restrictions on the salinities in which ships can operate in US waters. Our system has been approved and accepted to work in marine, brackish and fresh water, allowing vessels to enter the Great Lakes and other inland waterways”, said Peter Smith, sales director.

The AMS approval recognises that the system will continue to disinfect heavily silted seawater where UV light transmittance values are as low as 45% (75% being the value for normal seawater) at 190 Joules per square metre.

“All of these factors, combined with the stringent IMO test procedures, demonstrate our commitment to future proofing the system, so that owners can have confidence in their BWTS selection,” Mr Smith added.

In order to maintain its effectiveness, the system automatically adjusts to different sea water qualities and uses a UVT sensor to measure UV light transmittance. Cathelco says this provides a more reliable parameter for calculating the UV dose as well as ensuring that power is used economically.

In addition, the system features a cleaning system that uses special cleaning balls to remove residue from the quartz sleeves and internal surfaces of the chamber.

Cathelco BWT units are available with capacities from 34m³/hr to 2,400m³/hr.