Core Functions

1. Converts 4‑20 mA analog control signal to proportional hydraulic output for turbine valve positioning.

2. Built‑in hydraulic pilot valve & feedback mechanism, closed‑loop control with high linearity and low hysteresis.

3. Fast dynamic response, stable operation under high temperature, vibration and severe industrial environment.

4. Fail‑safe design: valve trips to safe position upon power loss or signal failure, meeting turbine safety interlock requirements.

5. Perfectly matched with Woodward 505, 505XT, TG series turbine control systems.

Electrical & Hydraulic Specifications

• Input Control Signal: 4‑20 mA DC (standard industrial current signal)

• Power Supply: 24 VDC (18–32 VDC wide‑range input)

• Hydraulic Supply Pressure: 1.4–1.6 MPa (200–230 psi)

• Control Output Pressure Range: Proportional to 4‑20 mA input

• Linearity Error: ≤±0.5% full scale

• Hysteresis: ≤0.3% full scale

• Response Time: <200 ms

• Operating Temperature: −20 ℃ ~ +85 ℃

• Certifications: CE, Class 1 Div 2 hazardous area compliant

Environmental & Mechanical Features

• Mounting: Flange mounting (standard turbine valve interface)

• Enclosure: Heavy‑duty stainless steel/cast metal housing, oil‑proof, dust‑proof, corrosion‑resistant

• Weight: ~4.8 kg

• Designed for long‑term 24‑hour continuous heavy‑duty operation in power station turbine island

Typical Applications

• Steam turbine main control valve, governor valve, extraction valve & bypass valve actuation

• Thermal power plant turbine speed‑load control system

• Petrochemical & industrial steam turbine governing control

• Combined‑cycle power generation unit valve control