In a power plant’s steam turbine fire-resistant oil system, the reset solenoid valve FRD.WJA3.042 is a critical component for ensuring safe system operation. When the reset solenoid valve is triggered due to a fault or operational requirement, confirming the valve position after a successful reset is crucial. Failure to promptly confirm the valve position change could lead to system malfunction or safety hazards. This article explains the function of the reset solenoid valve, the inspection process after a reset operation, and how to confirm the valve position change through the monitoring interface, providing practical guidance for power plant operations and maintenance personnel.
I. The Core Function and Reset Logic of the Reset Solenoid Valve
The reset solenoid valve FRD.WJA3.042 is primarily used to control the opening and closing of the oil circuit in a steam turbine fire-resistant oil system. Its core function is to electromagnetically actuate the valve core to shut off or restore the oil circuit when an abnormality such as oil pressure fluctuation, temperature anomaly, or protective triggering occurs, ensuring system stability and safety. Once the system fault is resolved or an operational command is issued, the reset solenoid valve must be reset manually or automatically, returning the valve core to its original position and restoring normal oil flow.
The reset logic of the reset solenoid valve is typically dependent on the DCS. During the reset process, the solenoid valve coil is energized, generating a magnetic force that pushes the valve core to the target position, overcoming spring force or hydraulic resistance. After the reset is complete, the system transmits the valve position status to the monitoring interface via sensors or signal feedback mechanisms for operator confirmation.
II. Post-Reset Interface Verification Process
After the reset solenoid valve FRD.WJA3.042 is reset, the operator must verify the valve position has actually changed through the monitoring system interface. The specific verification process is as follows:
1. Confirming the Reset Operation Status
On the monitoring interface, first review the reset solenoid valve’s operation log or status indicator. Most power plant systems will display the reset command execution time, operator identity, and the result (e.g., “Reset Successful” or “Reset Failed”) in the operation log. If the system indicates a successful reset but the valve position status has not updated, further investigation is required.
2. Observing the Valve Position Status Indicator
The monitoring interface typically features a valve position status display area, using color or text to visually indicate the current status of the reset solenoid valve. For the FRD.WJA3.042 reset solenoid valve, the valve position status should be consistent with its actual physical position. For example, when the valve core is in the closed position, the interface may display “Closed” or a red indicator light; when it is reset to the open position, the interface should display “Open” or a green indicator light. If the interface status does not update, possible causes include sensor failure, signal transmission delay, or mechanical solenoid valve obstruction, requiring further investigation in conjunction with on-site inspection.
3. Analyze with Historical Trend Charts
Monitoring systems typically provide a historical trend chart function that records the valve position changes of the reset solenoid valve. Operators can retrieve the trend chart for the time period before and after the reset operation to observe whether the valve position signal has experienced a step-like change. For example:
- Normal reset: The valve position signal in the trend chart quickly jumps from 0% to 100% after the reset command is issued, indicating that the valve core has fully moved to the target position.
- Abnormal reset: If the trend chart shows signal fluctuations or failure to reach the target value, this may indicate mechanical obstruction, coil failure, or control signal abnormality in the reset solenoid valve.
4. Verify Changes in Related Parameters
Changes in the reset solenoid valve’s position often trigger a chain reaction in other system parameters. If the reset solenoid valve controls the main oil circuit, system oil pressure may increase after it opens; after the oil circuit is restored, the flow meter readings in the related pipelines may increase. Observing changes in these related parameters can indirectly verify whether the reset solenoid valve’s position has actually taken effect.
5. On-site Verification and Interface Comparison
Although the monitoring interface provides a convenient remote verification method, on-site verification is still necessary as a supplementary measure. Operators can visit the reset solenoid valve installation location and verify whether its physical status matches the interface display by observing the mechanical indicator on the valve body or using an infrared thermometer to measure the solenoid valve coil temperature.
III. Common Problems and Solutions
When verifying the valve position of the reset solenoid valve FRD.WJA3.042, the following issues may occur:
1. Inconsistency between the interface status and the actual valve position
This issue may be caused by a sensor failure or signal interference. In this case, check the reset solenoid valve’s signal cable for looseness and oxidation, and try reissuing the reset command. If the problem persists, switch to manual mode for on-site operation and contact maintenance personnel to inspect the sensor.
2. Delayed Reset Solenoid Valve Response
If the interface indicates a successful reset but the valve position does not change immediately, this may be due to residual pressure in the hydraulic system or a limited solenoid valve actuation speed. Wait several seconds to minutes to observe whether the valve position gradually returns to its full position. If there is still no change, check whether the solenoid valve coil supply voltage is stable or if there is mechanical binding.
3. Frequent Misoperation of the Reset Solenoid Valve
If the reset solenoid valve frequently resets without triggering a protective action, this may be due to a control system logic error or a false triggering signal. In this case, check the input signal of the protection system for abnormalities and optimize the control logic to prevent false operation.
The reset solenoid valve FRD.WJA3.042 is a critical control component in the power plant’s steam turbine fire-resistant fuel oil system. Accurately determining its valve position is directly related to system safety. By combining real-time display on the monitoring interface, historical trend analysis, and on-site verification, operators can efficiently determine whether the reset solenoid valve has been effectively reset. At the same time, establishing a complete maintenance and emergency response mechanism for possible abnormal situations is the key to ensuring the stable operation of the power plant.
When looking for high-quality, reliable solenoid valves, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:
E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229
Yoyik offers various types of power plants spare parts for steam turbines, generators, boilers as below:
Prd Ysf9-138/130
Directional Valve For Conveyor Tensioning Device Fw-02-2B2-D24-50
Butterfly Valve D41W-5Jc
Check Valve H61H-250 Sa-105
Moog Valve D633-521B
Servo Valve Symbol 761K4112B
Solenoid Valve Sr551-Rn25Dw
High Pressure Globe Valves Manufacturers Khwj40F1.6P Dn32 Pn16
Low Re-Inlet Plug Valve Sd61H-P3547 Wcb
Screw Pump Mechanical Seal Hsn210-54
Electric Stop Valve J961Y-P22200V
Throttle Valve L61Y-P54.5150P 12Cr18Ni9
Screw Pump E-Hsnh-660R-40N1Zm
Plug Valve X13W-10
Electric Stop Valve J941H-40
Three-Way Valve J21Y-P5550P
Stop Valve J61H-250 25
Stop Valve J561Y-2500Lb
Globe Valve For Throttling Wj10F1.6P.03
Balanced Pressure 100Ay67X6-51
Shaft Output Valve 830W-D-2234Tt
Stop Valve J61Y-1500Lb
Check Valve Hlcw Pn 10 3″
Oil Pump Sqp32-38-14Vq-86-Dd-18
Throttle Valve L61W-900Lb
Pneumatic Control Valve T667H-16C
Electric Gate Valve Z941W-25P
Safety Valve A48Sh-64
Check Valve H67Y-64I
Boiler Drum Pulse Safety Valve A69Y-P54100V
Post time: Sep-05-2025