The steam turbine isolation solenoid valve F3DG5S2-062A-220AC-50-DFZK-V/B08 is a key component applied in the turbine protection and control system. Its main function is to quickly cut off the oil supply to the hydraulic servomotor in emergency situations, in order to avoid a decrease in system oil pressure due to the transient fuel consumption caused by the quick closing of the hydraulic servomotor. At the same time, the isolation solenoid valve also connects the safety oil from the electromagnetic fast closing valve to the hydraulic motor and the oil drain port of the electromagnetic fast closing valve, quickly closing the valve.

The working logic of the isolation valve F3DG5S2-062A-220AC-50-DFZK-V/B08 is as follows:

1. 1. During normal operation: The solenoid valve is in a closed state, and the hydraulic motor is feeding oil normally to maintain system oil pressure. At this point, the isolation solenoid valve does not operate.
2. 2. Emergency situation: When the system oil pressure drops or reaches a preset value, the control system sends a signal to energize the solenoid valve. After being powered on, the iron core inside the solenoid valve is subjected to electromagnetic force, which drives the valve stem to move and quickly cuts off the oil inlet of the hydraulic motor.
3. 3. Safety oil circuit connection: After the solenoid valve cuts off the oil inlet of the hydraulic motor, connect the safety oil to the oil outlet of the electromagnetic quick closing valve. In this way, the safety oil of the hydraulic motor can flow out smoothly, preventing the system oil pressure from continuing to decrease, and ensuring the safety of the equipment.
4. 4. Testing: In order to ensure the normal operation of the solenoid valve, regular testing is required. During the test, the intermediate oil pressure change is detected through pressure switches S4 or S5 to determine whether the solenoid valve can effectively operate.
5. 5. Fault failure: If the solenoid valve fails, it may lead to the risk of unit overspeed and “turbine water shock” accidents. Therefore, the solenoid valve should be regularly inspected and maintained to ensure its normal operation.

Yoyik can offer other hydraulic pumps or valves for power plants as below:
3 Way Servo Valve G771K202A
Turbine Vacuum Pump P-1751
Accumulators For Sale Nxq A 10/31.5
Globe Valve 3 4 Ljc65-1.6P
Vacuum Pump 24V P-1259
Variable Speed Hydraulic Coupling Yotcgp700
Water In Oil Detector Owk-2
Bladder Accumulator Working 28L Φ290Mm*860Mm
Ejection Oil Solenoid Valve 2Yv
Sealing Oil Relief Valve 5.7A25