Green Granulation Technology (GGT) is a world leading provider of fertilizer related process technology, offering urea granulation and other fertilizer-related technology. It is also the owner and licensor of the state-of-the art CRG urea granulation process. The next generation of the CRG process, the CRG under Deep Vacuum, was successfully commissioned in 3 capacities, a 600MTPD, a 1500MTPD and a 2700MTPD project. In each of these projects the same principles of the CRG process were adopted, but then applied under the principles of Deep Vacuum. In this paper, findings and experiences are shared regarding the commissioning and fine-tuning of this deep vacuum system.