It might make sense to align your high-pressure coolant with the right type of performance-designed cutting fluids such as semi-synthetics, finds Tim Stiers, an engineering manager for Castrol in our recent article.
“Anyone who’s tried using their legacy fluids with HPC has probably discovered their tendency to foam at 1,000 PSI and higher. This might not be a problem if the sump is large enough that the air bubbles have time to settle out, but in most cases, we’re going to recommend a semi-synthetic, which have anti-foaming properties and perform quite well at these elevated pressures.”
Have you run into foaming in your sump? This might be your culprit.
What do you think?