A suitable solution is the GlobeCore CMM-4/7 vacuum oil purification unit. It combines heating, filtration, and vacuum degassing in one compact system, allowing effective removal of water, gases, and solid contaminants. This makes it ideal for on-site transformer maintenance without the need to transport oil. The unit is mobile, easy to operate, and designed for medium oil volumes, making it a practical choice for service teams and substations requiring regular oil conditioning.