News

SGV1-65/0.8 Stator Cooling Water Filter Element: Isolation and Online Switchover
by Yoyik Kara on 26-10-15
Deionized water runs through the hollow conductors of a large generator stator, picks up heat, and returns to the coolers in a closed loop. A flow interruption of any length gets attention in the control room. Changing a filter element means working on that loop directly. The SGV1-65/0.8 stator c...
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DQ8302GA10H3.5S Jacking Oil Filter Element: Inlet and Outlet Replacement Schedules
by Yoyik Kara on 26-10-15
The jacking oil pump runs at startup, at shutdown, and during turning gear operation. It sends high-pressure oil under the journals and lifts the rotor off the bearing surface. Without that oil film the shaft rests on the babbitt at low speed, and the damage from repeated dry starts builds up slo...
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HQ25.600.18Z Diatomite Filter: Acid Value in Spec, Differential Pressure High. Replace or Wait?
by Yoyik Kara on 26-10-13
The oil report says acid value is fine. The gauge on the regeneration skid says the differential pressure across the filter is climbing. One number says leave it alone. The other says something is loading up. Operators run into this on fire-resistant oil systems more often than the manuals sugges...
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WU-A250×80FS Oil Suction Filter Element: A Missing or Pinched Seal and What the Pump Tells You
by Yoyik Kara on 26-10-12
What This Element Does The WU-A250×80FS is an oil suction filter element. It sits at the inlet of a hydraulic pump in a power plant, in the line or tank-mounted housing that feeds the pump. Its job is coarse filtration. It stops the larger particles before they reach the pump. Fine filtration hap...
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ZJ-20-T6 Electric Heating Rod: When the Bolt Won’t Stretch Enough
by Yoyik Kara on 26-09-15
Thermal tightening depends on a number. The bolt needs to elongate by a specific amount, within a specific time, or the joint doesn’t come together with the preload it’s supposed to have. When that elongation falls short and the heating rod‘s insulation resistance still checks o...
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SZMB-9 Magnetoelectric Speed Sensor: Same Frequency, Fading Signal
by Yoyik Kara on 26-09-15
Frequency tells you speed. Amplitude tells you something else — how much signal the sensor is actually managing to generate. On a magnetoelectric speed sensor, watching amplitude slowly drop while frequency stays exactly where it should be is a specific kind of warning, different from a sensor go...
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TD-2-26 Expansion Sensor: When the Needle and the Screen Don’t Agree
by Yoyik Kara on 26-09-14
Turbine casing expansion has to be watched closely during startup and load changes. Too much differential expansion, and clearances inside the turbine start closing up in places they shouldn’t. The TD-2-26 is an LVDT displacement sensor built for exactly this measurement, feeding both a loc...
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S3-VD-3-15A40 Voltage Transmitter: When Two Displays Disagree
by Yoyik Kara on 26-09-14
DCS says one voltage. The panel meter at the switchgear says another. Not wildly different — just off, consistently, by a small but noticeable margin. Someone’s already ruled out the PT secondary circuit. So the mismatch lives somewhere between the transmitter and the DCS input card, and th...
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Slide Gate Valve Spare Parts Kit 200×200 PN1.0: Scratch or Just a Trapped Particle?
by Yoyik Kara on 26-09-11
Coal conveyor lines leak a little after the gate shuts. Fine material gets past the seal, downstream side, right after closure. Most of the time it’s nothing — a bit of ash or pulverized coal sitting between the plate and the seat, gone by the next cycle. Sometimes it’s a groove worn ...
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A2201 Seal Kit: Reading a Sluggish Dome Valve Before You Open It
by Yoyik Kara on 26-09-11
A dome valve that used to snap open and closed now takes its time. Maybe it pauses partway through the stroke. Someone checks the air pressure gauge. Normal. So what now? The A2201 seal kit rebuilds the actuator cylinder on a DN100 pneumatic conveying dome valve. Worn internal seals are one usual...
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D633-460B Servo Valve: Jitter, Drift, and the Risk of Fixing It Wrong
by Yoyik Kara on 26-09-10
A servo valve like the D633-460B sits at the center of DEH position control. It moves the main steam valve and the governing valve to exact positions, based on an electrical command. Feedback tells the system where the valve actually sits. When that feedback starts jittering, or the zero point dr...
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P17458C-01 Embedded Sealing Ring: Chasing Dust Leaks That Come and Go
by Yoyik Kara on 26-09-10
A dome valve seals by inflating a ring, not by clamping metal on metal. The P17458C-01 is that ring — silicone rubber, built into the dome valve, expanding under air pressure to press against the dome and shut off dust flow. Simple concept. But when dust starts leaking after the valve closes, and...
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