Varnish buildup in oil systems and components can degrade performance and cause erratic valve operation. Some experts have conducted research and formulated new lubricants that could help solve those problems. One such oil proved highly successful during a five-year run at a gas turbine power plant. By eliminating the need for oil changes and valve maintenance at the site during the trial period, the oil even saved money compared to previously used formulations.

The formation of varnish by turbine oils is not a new phenomenon. However, it has become an intense topic of discussion over the last several years because of the resulting downtime, decrease in reliability, and loss of productivity it causes in the power industry. There are a few significant factors that contribute to this issue.

Dynamics Behind Varnish Formation

Through intense focus on asset reliability and operational efficiency, end users have begun to push limits and increase the performance of their power units. The same focus by original equipment manufacturers (OEMs) has led to higher performing equipment.…

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