The servo valve DH.00.176 achieves accurate control of steam flow by monitoring and adjusting the opening of the main steam valve, thereby effectively controlling the load of the steam turbine. In this way, the steam turbine can flexibly adapt to changes in load demand and maintain stable operating conditions.

• 1. Load Variation Requirements: Steam turbine systems often face changing load demands, requiring adjustments in output power according to the variation in electrical demand. This may involve increasing from partial load to full load or reducing from full load to partial load. Servo valve DH.00.176 achieves precise control of steam flow by adjusting the opening of the main steam valve to meet the output power requirements under different load conditions.
• 2. Governor Feedback Signal: Servo valve DH.00.176 utilizes the governor feedback signal to control the opening of the main steam valve. The governor monitors the turbine speed and compares it with the target speed. If the actual speed deviates from the target value, the governor calculates a correction signal and feeds it back to the servo valve. The servo valve adjusts the opening of the main steam valve based on this signal to increase or decrease steam flow, gradually bringing the actual speed closer to or maintaining it at the target speed.
• 3. Servo Valve Actuation Mechanism: Servo valve DH.00.176 typically employs a hydraulic or pneumatic-driven mechanism to control the opening of the main steam valve. This mechanism adjusts the input signal of the servo valve according to the indication from the governor feedback signal, thereby controlling the degree of opening and closing of the main steam valve. The servo valve usually possesses specific response time and sensitivity adjustments to ensure accuracy and stability in load response.
• 4. Stability and Performance Control: Accurate control of servo valve DH.00.176 ensures the stability and performance of the steam turbine. When there is a load variation, the servo valve rapidly adjusts the opening of the main steam valve to match the changing steam flow demand. This ensures the stability of the power system by reducing power fluctuations and oscillations. Additionally, the precise control provided by the servo valve can enhance the efficiency and energy conversion performance of the steam turbine, resulting in improved economic viability.

In the power plant steam turbine and generator, there are many different types of pumps and valves available. Contact Yoyik if you need any.
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DEH System Servo Valve D633-7392
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HPCV Servo Valve 0508.919T0102.AW019
HP/LP Bypass Valve G761-3600
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DEH System Servo Valve D664-4798-L05HABW6NEX2-G
Valves Hydraulic G423-824A