Product Description
Woodward A8516-038/9 is a mechanical-hydraulic governor of the TG‑13 series, a classic mechanical speed regulator for steam turbines manufactured by Woodward. A8516-038/9 is a variant configuration of TG‑13. It adopts hydraulic servo control for droop speed regulation without electronic boards. Robust construction makes it suitable for harsh environments. It adjusts the steam inlet valve opening to control turbine speed and load. This model is discontinued and serves as a high-value spare part for legacy steam turbines in power plants and chemical captive power stations for maintenance and overhaul.
Technical Parameters
- Brand: Woodward
- Model: A8516-038/9
- Series: TG‑13
- Product Type: Mechanical-Hydraulic Steam Turbine Governor
- Maximum Terminal Shaft Travel: 40°
- Rated Output Torque: 12.2 ft-lb (16.5 J)
- Control Mode: Droop speed regulation (isochronous mode not supported)
- Speed Range: 1200–2400 RPM (this configuration)
- Shaft Rotation: CCW counter-clockwise
- Hydraulic Fluid: Clean turbine oil
- Supply Medium: Pressurized control oil
- Housing Material: Die-cast aluminum alloy
- Mounting: Base mounting adjacent to turbine
- Functions: Speed sensing, hydraulic servo amplification, valve actuation, load regulation
- Protection Class: IP20 (optional weather cover for outdoor)
- Operating Temperature: -10℃ ~ +70℃
- Certifications: ATEX optional
- Lifecycle: Discontinued, spare part for legacy turbine overhaul
Application
- Speed and load regulation for industrial steam turbines and back-pressure turbines;
- CHP and captive power plant steam turbine generator sets;
- Steam turbines driving compressors, fans and pumps in chemical, refinery and paper mills;
- Turbo-expanders and waste heat recovery prime movers;
- Spare replacement and overhaul of aged TG‑13 mechanical governors;
- Turbine units where droop control is sufficient and isochronous control is not required.
Similar Series Models
A8516-038, A8516-039, 8516-044, 8516-070, TG611-13, TG611-17








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