High-vacuum filtration at your site restores oil health and extends transformer life — with before/after BDV proof in every report.
High-vacuum dehydration & degassing
Before / after BDV & moisture testingOnline filtration — transformer stays in service
Oil top-up & IS 335 replacement supply
Hot-oil circulation for core drying
Traceable test report & recommendationsAt Tajalli Tech, we provide comprehensive on-site transformer oil filtration designed to restore the dielectric strength of insulating oil and extend the service life of your transformer. Using high-vacuum, hot-oil equipment, our engineers dehydrate, degas and finely filter the oil in situ, removing the moisture and dissolved gases that reduce breakdown voltage — without the need to transport the transformer. The process can be carried out online while the unit remains energised or during a planned shutdown, and hot-oil circulation additionally assists in drying a damp winding.
On completion, you receive a traceable report presenting before-and-after BDV readings together with moisture content and an assessment of the oil's overall condition — evaluated in accordance with IS 1866, with oil topped up or replaced to IS 335 where it is no longer suitable for reclamation — providing documented evidence that the dielectric strength has been restored.
Yes. Online filtration is performed with the unit energised and in service, avoiding an outage. Where the oil is heavily degraded or the core requires drying, a filtration pass during a planned shutdown is more effective. Our team operates across Lucknow, throughout Uttar Pradesh and pan-India.
Where reduced breakdown voltage is due to moisture and particulate contamination, filtration restores the dielectric strength and the report confirms the improvement. Where the oil is chemically degraded beyond the limits of IS 1866, we advise accordingly and supply IS 335 replacement oil rather than filter oil that cannot be recovered.
Get a free assessment and quote from our engineering team.