
Product Description
Woodward 8405-052 Hydraulic Actuator – Precision Control for Critical Power Systems
The Woodward 8405-052 hydraulic actuator is an industrial-grade electro-hydraulic positioning device engineered for demanding turbine control applications. This actuator provides reliable, high-precision modulation of fuel valves, steam admission valves, and guide vanes in gas turbines, steam turbines, and large-bore diesel engines used across power generation, marine propulsion, and oil & gas sectors.
Technical Specifications
- Model Number: 8405-052
- Actuator Type: Electro-hydraulic linear actuator
- Control Signal: 4-20mA DC or 0-10V DC (configurable)
- Operating Pressure: 1500-3000 PSI hydraulic supply
- Stroke Length: Variable (application-dependent)
- Response Time: <50ms for full stroke
- Positioning Accuracy: ±0.5% of full scale
- Operating Temperature: -40°C to +85°C
- Enclosure Rating: IP65 (dust-tight, water-resistant)
- Weight: Approximately 8 kg
- Mounting: Standard flange interface with ISO compatibility
Key Features & Benefits
- High-Speed Response: Sub-50ms actuation ensures rapid load changes and transient stability
- Robust Construction: Corrosion-resistant materials withstand harsh industrial environments
- Integrated Feedback: Built-in LVDT position sensor provides closed-loop control accuracy
- Fail-Safe Design: Spring-return mechanism ensures safe valve positioning during power loss
- Wide Compatibility: Interfaces seamlessly with Woodward governors and third-party control systems
- Field-Proven Reliability: Decades of operational heritage in critical power applications worldwide
Application Scenarios
The Woodward 8405-052 actuator excels in:
- Gas Turbine Power Plants: Fuel valve modulation for load control and emissions optimization
- Combined Cycle Facilities: Steam admission control in heat recovery steam generators (HRSG)
- Marine Propulsion: Governor control for ship diesel engines and auxiliary power units
- Industrial Cogeneration: Precise steam flow regulation in CHP (combined heat and power) systems
- Oil & Gas Compression: Speed and load control for gas turbine-driven compressors
- Emergency Backup Generators: Fast-acting fuel control for rapid load acceptance
Integration & Control Solutions
This actuator integrates with Woodward control platforms including 505E, MicroNet TMR, and NetCon 5000 systems. It accepts standard analog control signals and provides position feedback for closed-loop governor operation. The unit can be configured for single-acting or double-acting hydraulic operation depending on valve requirements.
Common Questions & Answers
Q: What hydraulic fluid is recommended for the 8405-052?
A: Woodward recommends petroleum-based hydraulic oils meeting MIL-PRF-5606 or ISO VG 32-46 specifications. Synthetic fluids may be used in extreme temperature environments.
Q: Can this actuator replace older 8405 series models?
A: Yes, the 8405-052 maintains backward compatibility with legacy mounting interfaces and control signals, making retrofits straightforward with minimal system modifications.
Q: What is the typical service interval?
A: Routine inspection every 8,000 operating hours is recommended. Seal replacement intervals vary by application but typically range from 16,000-24,000 hours under normal conditions.
Q: Is calibration required after installation?
A: Initial calibration is performed at the factory. Field calibration may be needed to match specific valve characteristics—consult the installation manual for zero and span adjustment procedures.
Q: What warranty coverage is included?
A: All units ship with a comprehensive 12-month manufacturer warranty covering defects in materials and workmanship under normal operating conditions.
Related Products You May Need
| Product | Description | Link |
|---|---|---|
| Woodward 8405-029 Actuator | Compact hydraulic actuator for smaller turbine applications | View Product |
| Woodward 8404-205 Actuator | Heavy-duty actuator for large steam turbine control | View Product |
| Woodward TG-13 8516-038 Governor | Mechanical-hydraulic speed droop governor for turbine systems | View Product |
Why Choose Industrial Control Hub?
- ✓ Genuine OEM and certified aftermarket components
- ✓ Global shipping with expedited options available
- ✓ Technical support from experienced automation engineers
- ✓ Competitive pricing with volume discounts
- ✓ 12-month warranty on all products
Need assistance with sizing, configuration, or compatibility? Contact our technical team for expert guidance tailored to your application requirements.
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