The OPC solenoid valve 165.31.56.03.02 is a key component in the turbine overspeed protection system. Its function is to quickly open the relief channel of the overspeed protection oil pipe when the turbine speed exceeds the safety limit, thereby triggering the protection action. To ensure the reliable opening of the OPC solenoid valve during overspeed, a series of redundant designs and detection measures need to be taken to improve the safety and reliability of the system.

The redundant design of solenoid valve 165.31.56.03.02 is crucial. Use high-quality solenoid valves to ensure their normal operation in high temperature, high pressure, and high-speed oil environments. Adopting a dual solenoid valve configuration, when one solenoid valve fails, the other solenoid valve can take over the operation. The valve body and seals should be able to withstand system oil pressure and prevent oil leakage.

In addition, monitoring and protection are also essential. Install high-precision speed sensors to monitor the speed of the steam turbine in real time. Set the speed protection logic to automatically trigger the opening signal of the OPC solenoid valve when the speed exceeds the set safety limit. Implement feedback control of the solenoid valve to ensure that the opening signal can be reliably executed.

Through the above measures, the reliability of opening the solenoid valve 165.31.56.03.02 during overspeed can be greatly improved, ensuring the safe operation of the steam turbine. In the actual operation process, if the OPC solenoid valve is damaged, the following methods can be taken for troubleshooting:

1. 1. Visual inspection: Check if the valve body is damaged or leaking, check if the seals are intact, and check if the cables connecting the coil and valve body are worn or broken.
2. 2. Electrical inspection: Check if the coil is damaged, use a multimeter to test the resistance of the coil, and check if there is a short circuit or open circuit in the circuit connected to the solenoid valve.
3. 3. Functional testing: Manually operate the solenoid valve in a safe environment to check if it can be manually opened and closed. Simulate overspeed conditions using testing equipment and check if the solenoid valve can open within the specified time.
4. 4. Oil inspection: Check the pressure and cleanliness of the oil, and check for any bubbles or impurities in the oil.
5. 5. Logic and Control Check: Check the logic settings of the control system to ensure that the opening conditions of the OPC solenoid valve are correct. Check if there are any incorrect signal inputs to the solenoid valve, or if there are other control system issues affecting the operation of the OPC solenoid valve.

Yoyik can offer many spare parts for power plants as below:
Sealing components KHWJ25F 1.6P
AC AIR SIDE SEAL OIL PUMP HSNH210-36
Vacuum pump 30WS
BLADDER NXQ-A-10/20 F Y
servo valve D634-319C
GEAR OIL PUMP RCB-300
Slide Gate Valve Spare Parts 200×200 PN1.0
Bellows valves WJ15F3.2P
solenoid valve J-220VDC-DN10-D/20B/2A
Oil pressure compensating rubber bag 50L
Hydraulic ball valve RAS2140
accumulator 10ltrs
Inflatable seal dome valve-DN80 P19081C-01
Rubber Bladder for ST CWP Accumulator NXQ A-a/31.5-L-Y
Couplings-with valve 20KBIW10EVX