Woodward 8516-039 TG-13 Mechanical-Hydraulic Turbine Governor

Woodward 8516-039 TG-13 Mechanical-Hydraulic Turbine Governor

The Woodward 8516-039 TG-13 represents a proven solution in mechanical-hydraulic turbine speed governance, engineered specifically for API Standard 611 steam turbine applications. This governor combines robust mechanical design with hydraulic amplification to deliver reliable, precise speed control across demanding industrial environments.

Technical Specifications

• Model Number: 8516-039
• Speed Range: 2400 to 4000 RPM (adjustable)
• Speed Droop: ±0.25% (adjustable 2% to 6%)
• Output Torque: 12 ft-lb (16.3 N·m) maximum
• Hydraulic Supply Pressure: 150 to 300 psi (10.3 to 20.7 bar)
• Operating Temperature: -40°F to +185°F (-40°C to +85°C)
• Compliance: API Standard 611 for general-purpose steam turbines
• Mounting: Direct shaft-driven configuration

Key Applications & Use Cases

The 8516-039 TG-13 governor excels in critical industrial applications where mechanical reliability and fail-safe operation are paramount. Common deployment scenarios include:

• Refinery & Petrochemical: Driving compressors, pumps, and blowers in process units where electronic controls may face harsh environmental challenges
• Power Generation: Small to medium steam turbine-generator sets requiring autonomous speed regulation without external power dependency
• Marine Propulsion: Auxiliary steam turbines in marine environments demanding corrosion-resistant, vibration-tolerant control systems
• Industrial Manufacturing: Process steam turbines in paper mills, chemical plants, and food processing facilities

Engineering Solutions & Benefits

Mechanical Independence: Unlike electronic governors, the TG-13 operates without electrical power, making it ideal for emergency backup systems and hazardous area classifications where intrinsic safety is required.

Proven Reliability: The mechanical-hydraulic design eliminates concerns about electromagnetic interference, power supply fluctuations, or electronic component degradation in extreme temperatures.

Precision Control: Centrifugal flyweight mechanism with hydraulic servo amplification ensures stable speed regulation within ±0.25% droop, meeting stringent API611 performance requirements.

Field Adjustability: Speed setpoint and droop characteristics can be adjusted on-site without specialized tools, reducing commissioning time and maintenance complexity.

Common Questions & Answers

Q: Can the TG-13 governor be retrofitted to existing steam turbines?
A: Yes, the 8516-039 is designed for retrofit applications. Verify shaft speed compatibility (2400-4000 RPM) and hydraulic supply availability. Mounting adapters may be required depending on turbine manufacturer.

Q: What hydraulic fluid is recommended?
A: Woodward specifies turbine oil meeting ISO VG 32 or VG 46 viscosity grades. Maintain oil cleanliness to ISO 18/16/13 or better to ensure servo valve longevity.

Q: How does speed droop affect parallel turbine operation?
A: Speed droop enables load sharing between multiple turbines. The adjustable 2-6% droop range allows fine-tuning for balanced load distribution in multi-turbine installations.

Q: What maintenance intervals are recommended?
A: Inspect hydraulic oil quality quarterly, check flyweight mechanism annually, and perform full calibration verification every 2-3 years or per plant maintenance schedules.

Warranty & Support

All Woodward 8516-039 TG-13 governors supplied by Industrial Control Hub include a comprehensive 12-month warranty covering manufacturing defects and workmanship. Our technical support team provides application assistance, troubleshooting guidance, and replacement part identification to minimize downtime.

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