Technical Specifications Control signal: 4–20 mA; Hydraulic supply pressure: 3.5–16 MPa; Operating temperature: -30 °C to +120 °C; Enclosure rating: IP65.
Functional Features Hydraulic proportional drive; built-in LVDT position feedback; fail-safe spring return; high thrust output.
Application Scenarios Steam turbine control valve actuation, large industrial turbine governing, power plant turbine valve control.
Performance Parameters Stroke linearity: ±2.0% FS; Step response time: <40 ms.
Material Composition High-strength steel body; hardened piston and sleeve; high pressure hydraulic seals; LVDT position sensor.
Structural Characteristics Integrated hydraulic cylinder and proportional servo assembly; hydraulic ports and electrical signal connector.
Working Principle 4–20mA control signal adjusts servo valve spool position, controls hydraulic oil flow to piston chamber. LVDT feeds back piston position to form closed loop, spring returns actuator to safe position when hydraulic pressure is lost.
Installation Requirements Mount on turbine valve assembly; connect high-pressure hydraulic pipeline and signal cable; flush hydraulic oil circuit and calibrate stroke.
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