Aquarius UVX, the Atex-proof Ultra Violet BWMS

Aquarius UVX - Atex certified BWTS. For use in hazardous areas Zone 1 IIC T4.

The Aquarius UVX system is a fully automatic ballast water treatment system, designed and tested for installation and operation in a Zone 1 IIC T4 environment. It holds an ATEX Type approval and the design has been verified by DEKRA Test and Certification (Notified Body 0158).

Typically used on tankers and other vessels that require their ballast water treatment system to be installed in a Zone 1 or Zone 2 area, the Aquarius UVX uses a combination of hazardous area solutions. The system is independently approved to both ATEX and IECEx standards and can be installed in Zone 1 hazardous areas on both US and non-US flagged vessels.

From an operator point of view, it performs in exactly the same way as our standard area UV BWMS with some added safety features.

Atex logo, hazardous Zone 1 IIC T4

for operation and installation in a hazardous Zone 1 IIC T4 environment

IECex logo Wartsila Water and Waste

to IEC Ex standards; for installation in Zone 1 hazardous areas (US & non-US flagged vessels)


    • Supplied with plug & play intrinsically safe barrier box that enables all required signals from the hazardous area to be connected on installation (on the safe area bulkhead).
    • Installer only needs to consider the cable runs, as all IS circuits are supplied with suitable barrier protection.
    • Local junction boxes provided for installation in hazardous area, fully rated & certified.
    • System uses pneumatic actuators and a purge & over-pressure protection system for the UV chamber (using ship's air)
    • Thanks to modular design, only the filter and UV reactor need to be installed in the hazardous area. Power & control panels are installed in a safe area on the vessel. (connected via electrical & control related cabling)


    SystemCapacity (m3/h)Total installed power (kW)
    AQ-125-UVX12.5 / 12519.0
    AQ-300-UVX30 - 30047.7
    AQ-500-UVX50 - 50062.6
    AQ-750-UVX75 - 75092.2
    AQ-1000-UVX100 - 1000100.0

    The treatment capacity, process capability and performance of the Aquarius® UVX systems are exactly the same as those on the standard area Aquarius® UV systems.


    Delivered as standard

    • Filtersafe® filter fitted with EX d/e motors & instrumentation where required
    • Pneumatic actuators instead of electric ones
    • Ex e/i instrumentation on the UV chamber kit, including the flow meter
    • UV reactor with Ex p (purged and overpressure) system on the UV chamber
    • Sample point
    • Power distribution cabinet
    • Control cabinet

    Contact us

    Please fill in the form, we aim to respond within 1-2 business days depending on the enquiry. For an existing installation, provide all necessary details to identify the installation and the equipment. Fields indicated with an asterisk (*) are required.


    For NEWBUILD & RETROFITS, please contact +44 1202 662 600 or

    For SPARE PARTS, please e-mail us with the Equipment Serial Number or the name of the vessel at For urgent support, contact +44 1202 662 600.

    For TECHNICAL SUPPORT & SERVICE, please email us with the Equipment Serial Number or the name of the vessel at For urgent support, contact +44 1202 662 600.

    Equipment Serial Number is taken from the equipment nameplate and includes all letters and numbers as given on the equipment nameplate.