Alfa Laval PureBallast is an automated inline treatment solution for the biological disinfection of ballast water. Operating without chemicals, it combines initial filtration with an enhanced form of UV treatment to remove organisms in accordance with stipulated limits. The main component of the modular system is an enhanced UV reactor in which disinfection treatment occurs. The special design of the reactor’s synthetic quartz lamp sleeves supports transmission of a broader wavelength spectrum, providing more UV light during disinfection. Combined with the reactor’s internal design, this ensures optimal UV dosage and low energy consumption. This leaflet covers PureBallast 3 Compact Flex, a system of loose components, designed for simple, plug-and-play installation where space is vital. The system offers space savings of up to 20% compared to PureBallast 3 Std.