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Time is short to IMO revised G8

Alfa Laval PureBallast 3 is ready

Time to have IMO revised G8 in focus

If you sail internationally and outside United States waters, the IMO revised G8 guidelines affect you. The vast majority of the worlds ports will close to ballast water treatment systems installed after 28 October 2020 that don't meet IMO revised G8 requirements. Missing that fact could leave world ports off limits to your vessel.

Qu'est-ce que le G8 révisé de l'OMI?

Les directives G8 de l’OMI définissent le processus d’homologation de type des systèmes de traitement des eaux de ballast en vertu de la législation de l’OMI. Définies à l'origine en 2005, elles ont fait l'objet d'une révision critique en 2016. Cette révision entrera en vigueur le 28 octobre 2020.

Pourquoi les directives du G8 de l’OMI ont-elles été révisées?

Les directives révisées du G8, également appelées code BWMS, sont robustes et plus conformes aux exigences actuelles de la US Coast Guard (USCG). Ils ont été développés parce que certains systèmes de traitement des eaux de ballast approuvés selon les directives originales du G8 peuvent ne pas respecter la norme de performance IMO D-2 dans la pratique.

La pression pour les directives révisées du G8 a été conduite en partie par des organisations de clients comme la Chambre internationale des transports maritimes (ICS). L'objectif était de s'assurer que les investissements dans le traitement des eaux de ballast répondront aux exigences de rejet - au lieu de simplement ajouter du matériel.

Why do the IMO revised G8 guidelines matter for your business?

The deadline to comply with the IMO revised G8 guidelines has come. For vessels with international trade, the rules have important consequences when it comes to new ballast water treatment systems.

What the regulations say

The IMO legislation, which applies in over 90% of world ports, makes the following clear for ballast water treatment systems (BWTS):

  • BWTS installed on or after 28 October 2020 must to be type approved according to the IMO revised G8 requirements.
  • BWTS without IMO revised G8 type approval are not permitted for global use if installed after 28 October 2020.
  • For BWTS installed before 28 October 2020, the existing type approval remains valid.

Why PureBallast 3 is ready for IMO revised G8

Alfa Laval PureBallast 3 was the very first ballast water treatment solution with IMO revised G8 approval. Providing compliance without limiting vessel operations has always been the focus for Alfa Laval, so it was a high priority to be ready before the IMO revised G8 implementation date.

Tests with marine, brackish and fresh water were completed under the new IMO G8 regime in Q3 2017. PureBallast 3 received its updated certificate in February 2018 – with no changes to its hardware or power consumption. It continues to provide the market-leading performance that Alfa Laval customers have long appreciated.

Read more about IMO revised G8 type approval for PureBallast 3

Canada's Marine Experts


In Western Canada

Derek Gluschenko Regional Sales Manager
derek gluschenko+1 604 734 2225
Email Derek


In Quebec:

Pierre Gosselin, Directeur des ventes techniques
Pierre Gosselin +1 450 466 1120
Écrire à Pierre


In Central Canada

Vikram Nagpal Regional Sales Manager
+1 888 253 2226, Ext. 338
Email Vikram


For All Marine Systems

John Goswell Marine Division Manager
John Goswell Marine Systems+1 416-297-3410
Email John


FAQ – PureBallast 3 and IMO revised G8

Here are answers to some to common questions regarding the type approval of PureBallast 3 according to the IMO revised G8 guidelines.

1. What tests were needed to type approve PureBallast 3 according to the IMO revised G8 requirements?

Two additional land-based tests of biological efficacy, performed without holding time, had to be conducted in each water salinity. The component environmental tests are more in line with the requirements of U.S. Coast Guard (USCG). This means that the requirements are more stringent compared to the original 2008 G8 requirements.

2. Are there any hardware changes to PureBallast 3 as a result of the IMO revised G8 guidelines?

No new hardware has been added, but a conductivity sensor is integrated to the flow meter to determine which salinity the system is being operated in. For operation in fresh water, a flow control function has been included, which allows reduced flow in challenging waters in order to meet UVT limits.

3. Can a previously installed PureBallast 3 system be upgraded for compliance with the IMO revised G8 guidelines?

It is not necessary to upgrade. IMO has issued a resolution stating that vessels which have installed legacy systems should not be penalized.

4. Why does having IMO revised G8 type approval now matter for installations later?

Although the new rules entered into force on 28 October 2020, there are still ballast water treatment systems without IMO revised G8 type approval. Suppliers may say that a certificate is pending, but there is no guarantee of success in the more robust IMO revised G8 type approval procedure. If performance changes are needed to meet the new parameters, for example with regard to holding time, the system that is finally approved might no longer match a specific vessel’s needs and trade route. If nothing else, the process can take considerable time.

By choosing a system that has IMO revised G8 type approval today, you avoid the risk of a system that cannot be used when the time comes to install it.

Find out how IMO revised G8 affects your operation

With many years of experience, we can guide you to the right PureBallast 3 solution for your vessel. Contact us to secure compliance that gives you access to ports all over the world.