Turbine Oil Varnish Control Program Implementation


Varnish & Solubility – Video 1

The video below demonstrates how the feedstock for varnish deposits, oxidation by-products, that have precipitated out of solution are dissolved back into solution (soluble) when the oil temperature is increased. An opposite phenomenon occurs when peaking turbines go off-line and lube oil cools causing soluble contamination to precipitate out of solution resulting in varnish deposit formation throughout hydraulic control systems. Only SVR (soluble varnish removal) technology can remove oxidation by-products while still in solution to prevent precipitation and deposit formation in low flow and cool zones (servo valves). SVR is the proven solution to lube oil varnish!

Varnish & Solubility – Video 2

The solubility of oil is directly related to oil temperature. Warmer oil can hold more oxidation by-products in solution but as the oil cools oxidation by-products (feedstock for varnish deposit formation) comes out of solution and can form deposits in servo valves and other critical components. The first video below shows two oil samples from the same gas turbine with 3 year old oil which had MPC value of 35 (common for gas turbines). The sample on the left was treated with SVR (Soluble Varnish Removal) technology to remove soluble oxidation by-products, and the sample on the right was left untreated as found in the turbine.
At the beginning of the video both samples show oil with acceptable solubility indicated by clear oil appearance and no visible insoluble contamination above a temperature of 40C / 104F. As the oil is allowed to cool (simulating turbine off-peak or shutdown) the solubility of the oil decreases and the soluble oxidation by-products previously held in solution in the untreated sample on the right are rejected by the oil and become insoluble as the building blocks for varnish deposit formation (cloudy appearance of the oil). The SVR treated sample on the left has no soluble oxidation by-products in solution and thus it can safely cool without releasing varnish causing contaminant which will result in successful turbine start without varnish related unit trip or fail-to-start condition.
When combustion and steam turbines fall victim to unit trip or fail-to-start condition varnish is the usual suspect. SVR Soluble Varnish Removal skids prevent and remove varnish deposit formation in lube oil by removing oxidation by-products as they are formed and while they are still in solution (dissolved). By removing the soluble varnish feedstock SVR is addressing the primary cause of varnish before varnish deposits can form. Stop varnish before it stops you!
SVR restores the solubility of the oil by removing the soluble varnish causing contamination that other technologies can’t. By restoring solubility SVR enables the oil to chemically remove previously formed varnish deposits and reduce MPC varnish potential numbers from condition critical red to condition normal green.
Ask us how the SVR1200 can reduce and maintain a 13000 liters GE Frame 9E lube reservoir MPC value to single digits in approximately 45 days.
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