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KF90NY/15F6 Generator Seal Oil Pump — What a Blocked Inlet Strainer Does and How to Stay Ahead of It
The KF90NY/15F6 is an AC positive displacement pump used in the air-side seal oil circuit of thermal power plant generators. It draws lubricating oil from the seal oil tank or lube oil reservoir and delivers it at pressure to the generator shaft seals, where the oil film prevents hydrogen from es...Read more -
125LY-36 Auxiliary Oil Pump Coupling — Why Alignment Still Matters on a Pump That Barely Runs
There’s a logic trap that catches maintenance teams on standby equipment. The pump hasn’t been running, so it must be fine. The coupling hasn’t been touched, so the alignment must still be good. Neither of those assumptions holds up when you think about what happens to a station...Read more -
25JC-1.6P Globe Check Valve Internal Leakage: Using Hydrogen Purity and Makeup Data to Find It Early
Internal leakage in a hydrogen system valve is a different kind of problem from an external leak. There’s no visible drip, no smell, no obvious sign that anything is wrong. What happens instead is that the generator’s hydrogen atmosphere slowly changes — purity drifts downward, makeup...Read more -
HPT-300-340-6S Balance Drum Wear — Reading the Early Warning Signs Before the Thrust Bearing Fails
A boiler feed pump that’s been in service for a few years doesn’t announce balance drum wear with an obvious alarm. What it does instead is shift load — gradually, quietly — from the balance drum to the thrust bearing. By the time the thrust bearing temperature is climbing fast enough...Read more -
What Actually Happens to a Control Valve When Its ME8.530.024 Signal Board Dies
The ME8.530.024 is the board inside an electric valve actuator that handles the analog signal connection to the DCS or PLC. It takes in the 4-20mA command signal from the control system and sends back the valve position feedback. When this board fails, both of those functions can go at once — and...Read more -
VRT-2T Vibration Sensor — When the DCS Reading Disagrees With Your Portable Meter
At some point in any plant that uses online vibration monitoring, someone notices that the number on the DCS screen doesn’t match what their portable vibration meter shows on the same bearing. Maybe the DCS says 2.5 mm/s and the handheld says 4.1 mm/s. Or the DCS has been reading steady for...Read more -
HTD-300-3 LVDT Position Sensor — Why Connecting Rod Failures Trace Back to Installation
When an LVDT position sensor on a steam turbine valve starts giving bad readings or the connecting rod fails, the investigation usually starts with the sensor itself. Was it a manufacturing defect? Did the coil fail? Is the signal conditioner the problem? Often the answer is none of those — it...Read more -
WT0122-A50-B00-C01 Eddy Current Sensor Installation — Getting the Gap Voltage Right and Why It Matters for Differential Expansion Measurement
Installing an eddy current sensor for steam turbine differential expansion measurement isn’t complicated, but there’s one step that determines whether the sensor actually works correctly — setting the gap between the sensor tip and the target surface so the output voltage falls within...Read more -
JDQ-L2350 Ignition Lance Positioning — The Installation Detail That Determines Whether Your Boiler Actually Lights
A high-energy ignition system can produce a strong, reliable spark and still fail to light the burner consistently. When that happens, the first instinct is usually to check the ignitor unit, inspect the spark plug tip, or question the fuel supply. What often gets overlooked is something more bas...Read more -
SMCB-01-10L60 Speed Sensor Showing Bad Readings — How to Figure Out What’s Actually Wrong
When the speed display on a boiler feedwater pump or turbine tachometer goes blank, starts jumping around, or shows a speed that doesn’t match what the machine is doing, the question is always the same: is it the sensor, the cable, the power supply, or the monitor? Getting to the right answ...Read more -
How the QBJ-3C2/DO Speed Monitor Handles a Failed Sensor Without Tripping Your Turbine
Getting overspeed protection right on a steam turbine is a balancing act. Trip too sensitive and you’re shutting down on false alarms, dealing with the mechanical stress of unnecessary trips, losing generation. Miss a real overspeed and the consequences are significantly worse. The speed mo...Read more -
DF6101-005-065-01-10-00-00 Speed Sensor — Does It Actually Meet TSI Accuracy Requirements at 3000 RPM?
Speed measurement in a steam turbine protection system isn’t something you can afford to get wrong. The TSI system relies on shaft speed data to decide when to trigger alarms and when to initiate an emergency trip. If the rotational speed sensor feeding that system is off by even a small ma...Read more
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