Woodward 8404-201 Actuator | Precision Fuel Control

Woodward 8404-201 Actuator: Precision Fuel Control for Critical Applications

The Woodward 8404-201 actuator represents a proven solution for precise fuel metering in diesel engines, gas turbines, and industrial power generation systems. Engineered with Woodward's decades of governor technology expertise, this actuator ensures stable speed regulation and optimal fuel efficiency across demanding operational environments.

Technical Specifications

• Model Number: 8404-201
• Actuator Type: Electro-hydraulic fuel control
• Input Signal: 4-20 mA DC or 0-10 VDC (configurable)
• Operating Voltage: 24 VDC nominal (18-32 VDC range)
• Stroke Length: 25 mm (1 inch) linear travel
• Response Time: <50 ms for full stroke
• Operating Temperature: -40°C to +85°C (-40°F to +185°F)
• Protection Rating: IP65 (dust-tight, water-resistant)
• Weight: 4.5 kg (9.9 lbs)
• Mounting: Standard flange interface with M8 fasteners

Key Applications & Use Cases

The 8404-201 actuator excels in environments where precise fuel control directly impacts system performance and safety:

• Diesel Generator Sets: Maintains stable frequency and voltage regulation during load transients in standby and prime power applications
• Marine Propulsion: Delivers smooth throttle response for main and auxiliary engines on commercial vessels
• Gas Turbine Control: Provides accurate fuel valve positioning for industrial turbines in cogeneration and mechanical drive systems
• Pump & Compressor Drives: Ensures consistent speed control for critical process equipment in oil & gas, water treatment, and chemical processing
• Emergency Power Systems: Guarantees rapid response and stable operation during grid outages in hospitals, data centers, and critical infrastructure

Engineering Advantages

What sets the Woodward 8404-201 apart in fuel control applications:

• Proven Reliability: Field-tested across millions of operating hours in harsh industrial environments
• Precision Control: Sub-millisecond response enables tight speed regulation (±0.25% droop typical)
• Flexible Integration: Compatible with Woodward 2301, 505, and third-party governor controllers via standard analog interfaces
• Robust Construction: Corrosion-resistant materials and sealed electronics withstand vibration, moisture, and temperature extremes
• Simplified Maintenance: Modular design allows field servicing without complete system shutdown

Installation & Configuration

The 8404-201 mounts directly to fuel racks or valve assemblies using industry-standard flanges. Electrical connections utilize weatherproof connectors for signal and power inputs. Calibration procedures align actuator stroke with fuel system requirements, typically completed in under 30 minutes using Woodward's configuration tools or manual adjustment protocols.

Common Technical Questions

Q: Is the 8404-201 compatible with biodiesel and alternative fuels?
A: Yes, the actuator's wetted materials are compatible with B20 biodiesel blends and most petroleum-based fuels. For higher biodiesel concentrations or specialized fuels, consult Woodward's fuel compatibility guide.

Q: Can this actuator replace older mechanical governors?
A: Absolutely. The 8404-201 is frequently used in retrofit applications to upgrade mechanical governors to electronic control, improving response time and reducing maintenance requirements.

Q: What control signals does the actuator accept?
A: Standard configurations accept 4-20 mA current loop or 0-10 VDC voltage signals. Custom signal ranges can be accommodated through factory configuration.

Q: How do I troubleshoot erratic actuator behavior?
A: First verify input signal integrity and power supply stability. Check for mechanical binding in the fuel linkage. Inspect electrical connections for corrosion or loose terminals. Consult the service manual for detailed diagnostic procedures.

Q: What is the expected service life?
A: Under normal operating conditions, the 8404-201 typically achieves 50,000+ hours of service before requiring overhaul. Regular inspection and lubrication extend operational life.

Warranty & Support

Every Woodward 8404-201 actuator includes a 12-month manufacturer warranty covering defects in materials and workmanship. Our technical support team provides application assistance, troubleshooting guidance, and replacement part identification to minimize downtime.

Related Products You May Need

Customers configuring fuel control systems often pair the 8404-201 with these complementary components:

Why Choose Industrial Control Hub?

We specialize in sourcing genuine Woodward components and verified aftermarket alternatives for industrial automation and power generation systems. Our inventory undergoes rigorous quality verification, and every shipment includes documentation to support your asset management and compliance requirements.

Need technical specifications, wiring diagrams, or compatibility verification? Contact our applications team for personalized support.

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