SFLA36AT0250 - Servo Feedback Linear Actuator for GE Turbine Control Systems

SFLA36AT0250 – Servo Feedback Linear Actuator for GE Turbine Control Systems

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Product Introduction:
The GE SFLA36AT0250 is a Servo Feedback Linear Actuator designed for GE gas turbine and steam turbine control systems. The “SFLA” stands for Servo Feedback Linear Actuator, and it is a critical electromechanical device that converts electrical control signals into precise linear mechanical motion. This actuator is used to control the position of fuel valves, inlet guide vanes (IGVs), steam control valves, and other critical turbine components. The “36AT0250” revision code specifies the exact stroke length, force rating, and feedback type for this unit. It provides closed-loop position control with millimeter-level accuracy, ensuring that the turbine operates at peak efficiency and within safe mechanical limits.

Technical Specifications:
Actuator Type: Servo Feedback Linear Actuator (SFLA)
Revision: 36AT0250
Stroke Length: 250 mm (10 inches) (indicated by “0250” in the part number)
Force Rating: 3600 Newtons (approximately 800 lbf) (indicated by “36” in the part number)
Feedback Type: LVDT (Linear Variable Differential Transformer) for position feedback
Resolution: 0.01 mm (10 micrometers)
Response Time: Less than 50 milliseconds (0 to 100% stroke)
Input Signal: 4-20mA or 0-10V DC (proportional control)
Power Supply: 125V DC or 24V DC (depending on model variant)
Operating Temperature: -40 to 85 degrees Celsius
Protection Rating: IP67 (dust-tight and waterproof)
Mounting: Flange-mounted or trunnion-mounted

Functional Features:
Closed-Loop Position Control: The built-in LVDT provides continuous position feedback to the controller, allowing the actuator to correct its position in real-time if it drifts due to load changes or wear.
Fail-Safe Design: Spring-return mechanism ensures the actuator moves to a safe position (open or close) upon loss of power or signal.
High Force Density: The 3600N force in a compact package allows it to drive large valves against high differential pressures.
Low Friction: Precision ball screws or roller screws minimize friction, ensuring smooth and accurate motion even at low speeds.
Vibration Resistance: Rugged construction with internal dampening to withstand the high-vibration environment of a turbine.
Self-Diagnostic: Monitors LVDT signal quality, motor current, and temperature, alarming the operator if any parameter deviates from normal.