Aeroderivative Gas Turbines: Turbine Oil Selection and Lubrication Differences Versus Other Turbomachinery Aeroderivative gas turbines are industrial gas turbines developed from aircraft engine technology. They are compact, lightweight, high-power-density machines with very fast start-up capability. They are widely used in power generation, offshore platforms, LNG, pipeline compression, emergency power, mechanical drive applications, and peaking powerContinue reading "Aeroderivative Gas Turbines: Turbine Oil Selection and Lubrication Differences Versus Other Turbomachinery"

Air in turbine oil is not a single condition but a spectrum of physical states that behave differently inside a lubrication system. At one end, air exists as dissolved gas, fully in solution within the oil according to thermodynamic equilibrium (Henry’s Law). Under normal pressure and temperature, turbine oils can hold a significant amount of dissolvedContinue reading "⚙️ Air in Turbine Oil — Forms, Testing, Root Causes, and Corrective Actions"

Hopefully one day I would add photos, charts and all my field experiences and publish it. Now is just text. Please read and share it. Turbine Oil Reliability - TOR from Khash - FinalDownload Follow Khash LinkedIn ==> https://www.linkedin.com/in/khashayar-hajiahmad/ YouTube ==> https://www.youtube.com/@khashayar_Hajiahmad

🛢️ When MPC ΔL is High and the Patch Turns Black (Soot Formation & High-Temperature Degradation in Turbine Oils) 1. First – What Does ΔL Really Mean? In the ASTM D7843 MPC test, the L value represents lightness (white → black): High L → darker patch → more black particles (carbon/soot) Low L → lighter patch →Continue reading "🛢️ When MPC ΔL is High and the Patch Turns Black"

Gas Compressors – Interpreting MPC Patch Colors with Chemically Sound Accuracy This refined version keeps your powerful field insight—but aligns it with rigorous lubricant chemistry, so both engineers and chemists will agree with it. 1. What the MPC Test Actually Measures The Membrane Patch Colorimetry (MPC) test: Passes a diluted oil sample through a membrane Captures: insoluble particles borderline solubleContinue reading "Gas Compressors – Interpreting Varnish Colors on MPC Patch Tests Based on Gas Contamination"

I asked : When Varnishing forms then secondary damage would be which form ? so some times after bearing failure happens it covers the real foot print of the primary root cause which is varnish ? Khash Replied : Your question is exactly where many failure analyses go wrong—because varnish is not just a “deposit,”Continue reading "You Didn’t Have a Wear Problem… You Had a Varnish Problem"

Why the RCA of Each Code Points to Different Contamination and Wear Mechanisms Many people look at an ISO 4406 cleanliness result such as 18/16/13 and treat it as one single number. That is a serious analytical mistake. ISO 4406 is not one value. It is three separate population indicators for three particle-size thresholds: >4 µm(c), >6 µm(c), and >14Continue reading "Why ISO 4406 Particle Count Codes Must Be Trended Separately"

How VIM & VPR Certifications Transformed My Approach to Turbine Oil Reliability When I look back at my journey in lubrication—from field troubleshooting to global consultancy—there is a very clear inflection point: obtaining my VIM (Varnish Identification and Measurement) and VPR (Varnish Prevention and Removal) certifications from ICML. These were not just certifications.They fundamentally changed how I see, measure, and solve turbine oil problems.Continue reading "How VIM & VPR Certifications Transformed My Approach to Turbine Oil Reliability"

ASTM D1500 – Color of Petroleum Products A Deep Technical Perspective for Turbine Oil Engineers I was in the field and noted two cases. Darker used turbine oil sample noted but had lower varnish potential after testing done ( every one felt there is more varnish in that ) Lighter color used Turbine oil hadContinue reading "ASTM D1500 – Color of Turbine Oils"

Today On the Road , I asked Khash 😉 below There are many studies showing how mechanical filtration and better ISO codes increase the life of equipment like hydraulic systems , bearings or water removal how increases the life of these components, I have not seen how varnish removal increases the life of journal bearingsContinue reading "MPC vs Bearing Life: The Relationship No One Talks About"