Transformer Oil Conditioning
Lubemaster transformer oil conditioning systems restore, clean, and extend the life of insulating oils in power and distribution transformers. Instead of disposing of contaminated oil, you can recover it to near-new condition through advanced filtration, dehydration, and acid removal.
As a result, operators reduce downtime, lower disposal costs, and improve transformer reliability.
Complete Transformer Oil Conditioning Process
Lubemaster systems combine multiple stages of treatment to fully restore transformer oil, regardless of its starting condition.
First, the system removes solid particles using high-efficiency centrifuge filtration. This step quickly reduces contamination and improves overall oil clarity.
Next, vacuum dehydration removes moisture down to 6–12 ppm while also degassing the oil during operation. This helps protect insulation performance and improves dielectric strength.
After that, the Fullers Earth attachment reduces acidity to very low levels. In many cases, this process eliminates the need to dispose of transformer oil entirely, provided PCB levels are within safe limits.
Where oil has aged significantly, an anti-oxidant additive can be introduced to restore oxidation stability and extend service life.
Improved Oil Performance and Dielectric Strength
Transformer oil conditioning delivers measurable performance improvements. In many applications, dielectric strength increases from low levels (around 22 kV) to over 70 kV after treatment.
In addition, Fullers Earth filtration to 1 micron restores oil colour from dark brown to clean amber while reducing acidity to below 0.03 mgKOH/g.
Lubemaster OS600 and OS1200 Systems
Clean Oil Services offers two main transformer oil conditioning units designed for different operational needs. Both units use centrifuge technology coupled with Vacuum dehydration to provide the optimum return in oil condition.
The Lubemaster OS1200 delivers high-capacity performance with:
- Flow rates up to 8,400 litres (2,220 gal) per hour or 140LPM (36 gal/min)
- Dual centrifuge system
- 50 kW 3-stage heating system
- Electronic flow selection
- 1,000 litre holding tank
- Fully mobile trailer or truck-mounted configuration
This system dramatically lowers downtime during large‑transformer maintenance.
For smaller applications, the OS600 provides a reliable alternative with:
- Flow rates up to 4,200 litres per hour or 70LPM (18gal/min)
- Compact design for workshops and repair facilities
- Ideal performance for small to medium transformers
In addition, both systems can include optional Fullers Earth modules for advanced acid removal and full oil restoration. As well, where insulating oil has been carbon‑contaminated due to tap‑changer arcing, Fuller’s Earth provides an effective treatment to return the fluid to its original quality.
Efficient Heat Transfer and Oil Stability
Lubemaster systems improve thermal efficiency through an integrated heat exchanger. This design transfers heat between incoming and outgoing oil streams, reducing energy loss and improving processing efficiency.
At the same time, controlled heating ensures windings remain active during treatment, helping release trapped gases and improving circulation throughout the transformer.
Oil Testing, Monitoring & Compliance
Transformer oil conditioning works best when supported by regular testing. Therefore, Clean Oil Services provides:
- PCB testing
- Dissolved Gas Analysis (DGA)
- Oil condition monitoring
We recommend testing every 6 to 12 months to track gas trends, moisture levels, and contamination risks. This allows early detection of faults before they lead to costly failures or shutdowns.
On-Site Transformer Oil Recovery Services
When oil fails DGA or shows high moisture content, we provide on-site treatment without removing oil from the transformer. This approach reduces downtime and avoids unnecessary disposal costs.
Lubemaster systems vacuum-dehydrate, degas, and filter oil while it remains in service, helping restore insulation performance safely and efficiently.
Environmental Benefits
Transformer oil conditioning significantly reduces waste. Instead of disposing of used insulating oil, operators can restore it to usable condition in most cases.
As a result, organisations reduce environmental impact while improving operational efficiency and extending asset life.
Oil Transfer Equipment for Transformer Applications
Clean Oil Services also manufactures specialised transformer oil transfer systems designed for safe and controlled handling.
Key features include:
- Flow rates up to 150LPM
- Variable speed control
- 1 micron final filtration
- Forward and reverse pumping capability
- Remote control operation (20 m lead)
- Portable trolley-mounted design
- Automatic shut-off to prevent back-flow
These systems support safe oil movement during maintenance, servicing, and conditioning operations.
See “What our Clients have to say” for some results of field trials.
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