Previously in this series we have discussed lubricant solvency, turbine lube oil varnish formation and lube oil varnish testing. Today we’re concluding the series (drawn from an article recently published in Combined Cycle Journal by Peter Dufresne Jr. and his team at EPT) by explaining how to remove varnish from your fluid & system components as well as how to prevent varnish from forming in the first place.
In part 2 of our varnish series we discussed factors affecting lubricant solvency. This week we’re covering the varnish formation cycle and testing for varnish. Let’s jump right into it!
Last week we covered varnish formation and lubricant solvency as we started a four part series based on an article recently published in Combined Cycle Journal by Peter Dufresne Jr. and his team at EPT. This week we’re sharing information about factors affecting lubricant solvency. Read on and you will be an expert on lube oil varnish by the end of this series.
Despite thousands of dollars and hours spent trying to mitigate the effects of varnish in turbine oil, many still suffer from this ongoing yet solvable issue. When combustion and steam turbines fall victim to unit trip or fail-to-start conditions, varnish is the usual suspect.
The Problem of Varnish Contamination
Varnish contamination is the inevitable byproduct of many degradation processes in hydraulic and lubrication systems. The effects of varnish on industrial and manufacturing systems range from the nuisance of minor downtime and routine maintenance to, worst case scenarios, multi-million dollar catastrophic failures of major capital equipment.