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The servo valve ZD.01.003 is one of the key components in the DEH system, which achieves precise adjustment of the turbine main steam valve by converting electrical signals into hydraulic signals. This servo valve adopts electro-hydraulic conversion technology, which uses electromagnetic force to convert electrical signals into hydraulic signals, thereby controlling the opening of the main steam valve and regulating the main steam flow rate.
When the servo valve ZD.01.003 receives the electrical signal from the controller, the internal coil generates a corresponding magnetic field based on the received electrical signal. This magnetic field will generate attraction or repulsion force on the iron core on the valve core, causing the valve core to move. The movement of the valve core will change the gap between the hydraulic valve core and the valve seat, thereby adjusting the opening of the main steam valve of the turbine. By controlling the size and direction of the electrical signal, the servo valve can achieve precise adjustment of the main steam valve of the steam turbine.
| Technical Specification of Servo Valve for Reference | |
| Valve Type | Electro hydraulic servo valve |
| Connection | Aviation plug |
| Material | Stainless steel |
| Maximum Rated Flow | 76l/min |
| Maximum Total Null Leakage | 2l/min |
| Maximum Pilot Flow | 0.35l/min |
| Maximum Supply Pressure | 210bar |
| Minimum Supply Pressure | 14bar |
| Proof Pressure | 150% At Supply Port |
| Burst Pressure Return Port Open | 250% |
| Maximum Operating Temperature | 135°C |
| Hysteresis Around Null | ≤3% |
| Symmetry Error | <10% |
| Linearity Error | <10% |
| Threshold | ≤0.5% |
| Condition | Brand-New |
| After-service | Cleaning and testing |
Yoyik offers different types of Hydraulic solenoid valves for industrial users:
two way globe valve JC80-1.6P
bellows sealed stop valve JC65-1.6P
iron globe valve 50FWJ1.6P
Needle globle valve 40BJ-1.6P
electro hydraulic servo G761-3005B
single stage servo valve G761-3000B
24 volt solenoid valve AM-501-1-0148
stainless needle valve SHV20
Reheat system electric drain valve WJ40F1.6P
SOLENOID VALVE SUBASSEMBLY 300AA00126A
globe style check valve 80FJ-1.6PA2
valve coil solenoid Z2804070
DDV servo valve D661-K4893
stainless globe valve 25JC-1.6P
differential pressure valve 977HP
valve 0508.919T0104.06AW DB24
solenoid valve M-3SEW6U3X/420MG24N9K4/V
Flow Control Valve D633-7392
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