Varnish and soft deposits
Oxidation products settle on servo valves and coolers; particle counts miss them.
Power Generation
Turbine oil filtration and varnish removal for power plants
We fit CJC depth filtration to turbine lube circuits, EHC fluids, transformer oil and standby diesel, on load.
What goes wrong
Water in the lube oil
Gland steam and condensation put water in, attacking additives and corroding surfaces.
Fine particles in control oil
The 3 to 5 µm silt passing inline filters is what seizes spools.
Transformer oil drift
Moisture rises between annual tests; the usual fix needs an outage.
The cost of an unplanned trip
An unplanned trip costs lost generation, not oil price. A varnish unit can also save a 30,000 litre charge from replacement.
The business caseWhat we fit
Sizing starts with the reservoir volume and the last MPC result.
Varnish removal unit
Removes oxidation products, verified by MPC testing before and after.
Fine filter on the tank
3 µm absolute depth filtration that also absorbs free and emulsified water.
Online transformer treatment
Permanently mounted filtration and drying, running with the transformer energised.
Project Profile
Steam turbine lube system, 30,000 L
Slow valve response with normal particle counts, but MPC in alarm. A varnish unit cleared it in ten weeks; the oil stayed in service.
A typical project: customer not named, figures indicative. Verified site data available on request.
Case studies
Before
After
Common questions
Can you fit filtration without taking the turbine off load?
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Yes. It connects to the reservoir, not the lube circuit, and runs while the unit runs.
Will filtration remove varnish that has already deposited?
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It removes precursors from the oil, and deposits slowly dissolve out over weeks. Baked-on deposits may need mechanical cleaning.
Do you handle phosphate ester and fire resistant fluids?
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Yes, with the correct insert grade. These fluids need different media from mineral turbine oil.
Technical Enquiry
Request a turbine oil assessment
Send particle count, water content and MPC if available. We will say whether it is varnish or particles.
- We reply within one working day.
- We size the unit for your tank and oil, not from a catalogue.