Separate Seal Oil and Lube Oil Consoles in Wet-Seal Gas Compressors A practical maintenance and oil analysis article from Khash’s perspective In many process gas compressors, especially older centrifugal compressors handling natural gas, refinery gas, synthesis gas, sour gas, or wet process gas, the machine may have two separate oil systems: Lube oil system: for bearings,Continue reading "Separate Seal Oil and Lube Oil Consoles in Wet-Seal Gas Compressors"
How Khash Would Compare Turbine Oils
Turbine Engineer asked me : All companies like Shell, TOTAL, Mobil , Chevron etc are global lubricant manufacturer , do we need to really care about technical comparison or leave it to the procurement to buy the cheapest among all ? Khash , How would you compare them technically. Khash: By looking at Datasheet onlyContinue reading "How Khash Would Compare Turbine Oils"
Why Old Group I Turbine Oils Were “More Polar” and Group II / III Are “Less Polar” — and Why This Changes Varnish Behaviour
Why Old Group I Turbine Oils Were “More Polar” and Group II / III Are “Less Polar” — and Why This Changes Varnish Behaviour When a Turbine engineer asked me above , I replied: First, one correction: Group I turbine oil is not truly “polar” like water or phosphate ester fluid.It is still a hydrocarbonContinue reading "Why Old Group I Turbine Oils Were “More Polar” and Group II / III Are “Less Polar” — and Why This Changes Varnish Behaviour"
Electro-Kinetic Wear of Servo Valve Mechanical Surfaces in EHC / Hydraulic Control Systems
Streaming-Current Erosion Electro-Kinetic Wear of Servo Valve Mechanical Surfaces in EHC / Hydraulic Control Systems Servo valves are among the most sensitive components in any hydraulic or electro-hydraulic control system. In steam turbine EHC systems, gas turbine hydraulic control systems, compressor control systems, and other critical turbomachinery applications, the servo valve is expected to moveContinue reading "Electro-Kinetic Wear of Servo Valve Mechanical Surfaces in EHC / Hydraulic Control Systems"
Types of Water in Turbine Oil: Soluble, Emulsified, and Free Water
Types of Water in Turbine Oil: Soluble, Emulsified, and Free Water Water in turbine oil is not just “water.” Its form determines how dangerous it is, how visible it is, how fast it damages the system, and which removal technology will work. In turbine oil reliability, we should always ask: What type of water isContinue reading "Types of Water in Turbine Oil: Soluble, Emulsified, and Free Water"
How to Know Turbine Oil Sampling Was Wrong, the Lab Made Mistakes, or the Diagnostic Conclusion Is Not Trustworthy
How to Know Turbine Oil Sampling Was Wrong, the Lab Made Mistakes, or the Diagnostic Conclusion Is Not Trustworthy A practical guide for turbine oil reliability engineers In turbine oil analysis, a wrong sample can create a wrong diagnosis, and a wrong diagnosis can create unnecessary shutdowns, wrong filtration decisions, wrong oil change decisions, or falseContinue reading "How to Know Turbine Oil Sampling Was Wrong, the Lab Made Mistakes, or the Diagnostic Conclusion Is Not Trustworthy"
When a Varnish Removal Unit Becomes a “Varnish Relocation Machine”
When a Varnish Removal Unit Becomes a “Varnish Relocation Machine” A Real Turbomachinery Lesson on Temperature, Solubility, Shutdowns, and Hydraulic Valve Jamming In turbomachinery lubrication and hydraulic control systems, varnish removal is often discussed as if it is only a filtration problem. Install a varnish removal unit.Run it for some time.MPC drops.Oil looks cleaner.Problem solved.Continue reading "When a Varnish Removal Unit Becomes a “Varnish Relocation Machine”"
Varnish Removal Units That Use a Cooler to Force Varnish Removal
Varnish Removal Units That Use a Cooler to Force Varnish Removal A Technical Article from a Turbine Oil Reliability Perspective In many turbine oil and hydraulic oil systems, varnish removal units are offered with a cooler installed before a depth filter, cellulose filter, electrostatic collector, or other fine filtration element. The basic concept is simple: Cool theContinue reading "Varnish Removal Units That Use a Cooler to Force Varnish Removal"
Resistivity in EHC Phosphate Ester Fluids: The Parameter Many People Underestimate
Resistivity in EHC Phosphate Ester Fluids: The Parameter Many People Underestimate In steam turbine EHC systems, the fire-resistant fluid is not only a hydraulic medium. It is part of the turbine control reliability chain. It transmits command signals hydraulically to stop valves, control valves, intercept valves, and reheat stop valves. Because these systems often useContinue reading "Resistivity in EHC Phosphate Ester Fluids: The Parameter Many People Underestimate"
How to Do Turbine Oil Failure Root Cause Analysis
How to Do Turbine Oil Failure Root Cause Analysis Considering Turbine Oil as an Asset — with ISO 55000 and ICML 55 in Mind By Khash — MLE Perspective In many plants, turbine oil failure root cause analysis is treated as a laboratory problem: “The TAN increased.”“The MPC is high.”“The RULER dropped.”“The oil is dark.”“TheContinue reading "How to Do Turbine Oil Failure Root Cause Analysis"