ballast system
ballast system

Proven robust and secure ballast water treatment

​Ballast water treatment regulations are now taking effect. Both the IMO Ballast Water Management (BWM) Convention, the BMWS Code, and U.S. Coast Guard (USCG) legislation are in force.​Alfa Laval PureBallast 3 is a dependable choice not only in its own right, but also in terms of the global organization behind it.​

  • The first chemical-free ballast water treatment solution to gain IMO type approval​​
  • One of the first non-domestic ballast water treatment solutions approved by the Chinese, Japanese and Korean flag administrations

Type approvals

Alfa Laval PureBallast 3 is type approved by IMO according to the revised G8 guidelines and by the U.S. Coast Guard (USCG).

IMO type approval

PureBallast 3 was specifically developed for the demands of the marine environment, with the needs of marine customers firmly in mind.​ Our work in ballast water treatment is part of a larger effort. Alfa Laval is committed to meeting legislative demands with workable, sustainable solutions that go unnoticed on board. ​ Alfa Laval PureBallast 3 is certified for use in all water salinities: fresh, brackish and marine

USCG type approval

The USCG type approval for PureBallast 3, which allows the discharge of ballast in United States waters, was issued in December 2016. Today’s PureBallast 3 is certified for use in all water salinities: fresh, brackish and marine. The type approval testing was performed using the CMFDA/FDA (staining) method and the same hardware, power consumption and flow as the IMO-approved version of the system.

Type approval for early generations

Most systems of the previous generation, PureBallast 2, can also be upgraded for USCG type approval. In April 2020, USCG tests were completed using a PureBallast 2 system with a Boll & Kirsch filter and minor modifications. The solution was type approved in November 2020 and can operate in both seawater and brackish water.

Class certifications

Both standard and Ex versions of PureBallast have been certified by the major classification societies:​

  • American Bureau of Shipping (ABS)
  • Bureau Veritas (BV)
  • China Classification Society (CCS)
  • Korean Register of Shipping (KR)
  • Lloyd’s Register (LR)
  • Polish Register of Shipping (PRS)
  • Registro Italiano Navale (RINA)
  • Russian Maritime Register of Shipping (RMRS) 
  • Vietnam Register (VR)

PureBallast 3 type approved in the Republic of Korea

Alfa Laval PureBallast 3 has received type approval from the South Korean flag administration. As of 20 October 2021, PureBallast 3 systems can be installed on vessels registered in the Republic of Korea. “Having long delivered PureBallast 3 to Korean shipyards, we are proud to begin supplying Korean customers,” says Tobias Döscher, Head of Global Sales, Business Development & Marketing for Alfa Laval PureBallast.


Star Bulk to install PureBallast 3 bulker-fit configurations

Six of Star Bulk’s bulkers have already been retrofitted with Alfa Laval PureBallast 3 systems for ballast water treatment. Pursuant to a new agreement entered into with Alfa Laval, PureBallast 3 systems with bulker-fit configurations will now be retrofitted on 37 other Star Bulk vessels.

Star Bulk bulker

Satisfied customers in PureBallast compliance

Efficient tanker retrofits with Alfa Laval ballast water treatment systems and deckhouses

Based in Glyfada, Greece, Millenia Maritime Inc. is an international ship management company that transports oil products with a fleet of double-hull MR tankers and its management takes pride in doing modern and efficient business. That includes choosing Alfa Laval PureBallast 3 Ex ballast water treatment systems in deckhouses – and completing successful retrofits in record time.

PureBallast Mill 640x360

PureBallast 3 systems enter Briese Group’s fleet

Briese Group, Germany provides custom marine transport solutions to a wide range of customers. Having selected Alfa Laval PureBallast 3 for roughly 100 vessels, they feel secure in Alfa Laval’s expertise and flexibility – which proved valuable during first installations at the height of the COVID-19 pandemic.

Ballast water treatment

A smarter fit with simpler engineering

“You have the savings in the system itself, plus OPEX savings,” says Vikas Laul of VSL Marine Technology, the first company to engineer with the 1500 m3/h PureBallast 3 reactor. “And you have savings in installation, piping and associated electrical components.”

New reactor size = smaller, smarter PureBallast 3 systems

PureBallast 3 receives USCG type approval with minimized holding time

Alfa Laval PureBallast 3 has received an updated type approval from the U.S. Coast Guard (USCG). The new certificate makes it possible for vessels to deballast in United States waters with a holding time of just 2.5 hours – which is only needed when crossing between Captain of the Port Zones.

uscg approval vignete

PureBallast 3 on ice-classed LNG RoRos for WALLENIUS SOL

WALLENIUS SOL is establishing an open cargo liner service for industries around the northern Baltic Sea. The company’s unique new LNG-fuelled Mega RoRo vessels – which will have ice class 1A Super – will use PureBallast 3 for ballast water treatment. In time, so will the rest of the fleet.

Wallenius SOL vignette

IMO revised G8 – in force now

As of 28 October 2020, more stringent IMO rules apply to the type approval of ballast water treatment systems. In short, the IMO revised G8 guidelines put most ports off limits to new systems installed without an updated certificate.

G8 October vignette640x360

KOTC chooses Alfa Laval PureBallast 3 for ballast water treatment throughout its fleet – including VLCCs

Kuwait Oil Tanker Company (KOTC) is one of many ship owners choosing UV ballast water treatment over electrochlorination for large ballast water flows. Alfa Laval PureBallast 3 will be installed on vessels throughout the KOTC fleet, including VLCCs with flows of 6000 m3/h each.

Read the full story


The leading supplier and system

Having pioneered the application, Alfa Laval and PureBallast are the most established choices in ballast water treatment.

A history of leadership

Alfa Laval has been involved with ballast water treatment for more than a decade. Besides developing treatment technology, we have provided biological and technical competence on key panels whose role is to develop standards and educate the market.

PureBallast, which was developed in cooperation with Wallenius Water, is a mature system that has long been at the forefront of ballast water treatment. The original system, launched in 2006, was the very first commercially available treatment solution.

Widely sold and widely trusted

More than 5,500 PureBallast systems have been sold to date, thousands of which have already been delivered and commissioned. Thousandsof PureBallast systems have been installed as retrofits, and installations have been performed worldwide at a diverse range of shipyards.

Just as importantly, PureBallast been chosen for a diversity of vessel types: container ships, tankers, bulk carriers, offshore supply vessels, naval vessels and more.


Complete global support

Alfa Laval is a strong company with a strong dedication to marine customers and their needs – in ballast water treatment and beyond.

True marine focus

All generations of Alfa Laval PureBallast, current and previous, have IMO type approval. Alfa Laval PureBallast 3 is type approved according the revised 2016 G8 guidelines, which apply to all systems installed after the entry into force on 28 October 2020. For PureBallast systems installed prior to 28 October 2020, previous type approvals remain valid and no upgrade is necessary.​ Today’s Alfa Laval PureBallast 3 is certified for use in all water salinities: fresh, brackish and marine.

Ballast water experts a call away

Present from start to finish., ballast water treatment experts are here for advice, documentation, design assistance and thorough support during new installations, retrofits and commissioning are a clear part of our offering in ballast water treatment.

Service around the world

Our service experts put uptime, optimization and availability in focus. Accessible 24/7, our service organization combines local presence in ports worldwide with a vast base of global experience. By offering compliance services, our experts extend performance and ensure cost-efficiency for the life-time for you vessel.