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Thursday, June 27, 2019 

The Evac Evolution Ballast Water Management System (BWMS) has now received Type Approval from the US Coast Guard (USCG).

The system is manufactured by Cathelco, part of the Evac Group, which attained USCG Alternate Management Systems (AMS) acceptance for its original BWMS over four years ago. When it became apparent that the USCG’s definition of ‘non-viable’ would become the universal standard for testing systems, Cathelco redesigned the equipment and embarked on another round of land-based and shipboard testing.

“We are delighted to have achieved USCG Type Approval which represents the culmination of many years work. As a second generation system, the Evac Evolution enables customers to benefit from the latest technical advances combined with experience gained with earlier version installations stretching back over almost a decade”, said Lauri Laaksonen, CTO, Evac Group.

According to Evac, this is the first USCG certificate to show UV transmission (as opposed to UV intensity) as a real measurement of water quality. UV transmission information for ports is readily available, helping owners to make an informed decision about choosing a suitable system for their vessels’ trading patterns.

IMO Type Approval to the latest G8 standard was received in May, 2019. This revised standard and the recent Ballast Water Management Code have more robust definitions of the design limitations of BWMS equipment.

The Evac Evolution BWMS, based on a combination of filtration and UV technology, incorporates a feedback ‘loop’ based on the measurement of UV transmission which determines precise dosage. It automatically adjusts to different seawater qualities in harbours and estuaries ensuring the optimum UV dosage is applied at all times, but saving on power whenever possible.

“We set the objective of achieving effectiveness down to 55% UVT in all salinities and we have adopted linear scaling which means that it will work on all types of vessels”, said Robert Field, Cathelco Technical Director.

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