“Our plant often uses standby equipment in several critical applications. Are there any special lubrication guidelines for this type of equipment that may sit for weeks or months without being used?”
Effective Varnish Removal from Turbine Lubrication Systems
In recent years, the power-generation industry has seen an increase in varnish-related problems in combustion turbines. This increase is attributed to higher operating temperatures, smaller fluid reservoirs, more peaking and cyclic service, highly refined base stocks that have lower solvency for varnish precursors, and a more widespread use of finer filtration that causes more electrostatic charging of the turbine oil.
Are Bio-based Lubricants Worth the Extra Cost
“Are bio-based oils worth the extra cost to switch lubricants? Are they as effective as mineral base oil and synthetic lubricants?”
The vast majority of lubricants used in industrial applications are formulated with mineral base oils. The remaining are synthetic base oils and a small percentage of vegetable- or animal-based oils. While mineral oils are effective and often well-priced, their environmental impact can be problematic, particularly when it is estimated that up to 50 percent of lubricants end up in the environment. Most synthetics are challenged by their lack of biodegradability as well.
How the Oxidation Rate Affects Oil Change Frequency
“How much should an oil’s oxidation rate affect the frequency of an oil change?”
Oxidation is a reaction that takes place between the molecules of a lubricant’s base oil and existing oxygen in the form of foam or entrained air. Once oxidation begins to occur, it can, and often will, lead to an adverse, permanent chemical change in the molecules. As this process is initiated, the molecules, which typically are hydrocarbons, are transformed into proponents that hinder the lubricant’s performance.
The Pros and Cons of Polishing Wear
Polished machine surfaces can improve equipment performance by reducing friction and increasing efficiency. There are many ways to polish machine surfaces, with the results depending on the desired outcome. When it comes to lubricants, additives can be used to help chemically polish these surfaces during the running-in process. However, problems can arise if you do not understand the proper way to polish surfaces or how lubricant selection factors into the equation.
