Varnish in turbomachinery applications has been a problem for almost two decades now. There are numerous reasons for its appearance, including higher operating temperatures, smaller oil reservoirs and fluctuating duty cycles - but one reason seems to cop more attention than most - the move from Group I to Group II style formulations. If I’m reading the trends correctly, the same factors that have caused varnish to become an issue will start hitting smaller assets like gearboxes, which means the varnish problem will be even bigger. Let’s look at why.
lubrication.expert
4 окт 2023
