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Woodward 8915-741
- Product Name: 3103 Gas Fuel Metering Valve complete with EM35 Electro-Hydraulic Actuator
- Product Introduction: Unlike the TM55-equipped variants, the Woodward 8915-741 pairs the 3103 rotary sleeve-and-shoe gas fuel metering valve with an EM35 electro-hydraulic actuator. This configuration is part of Woodward’s 3103 valve family for industrial gas turbine fuel control.
Detailed content
- Technical Specifications:
- 3103 valve: rotary sleeve-and-shoe throttling type
- Valve position feedback: high-accuracy resolver
- EM35 actuator: electro-hydraulic design
- The 3103 EM35MR variant (all-electric evolution) specifications: Maximum gas supply pressure 720 psia (4,964 kPa) standard, 900 psia (6,205 kPa) enhanced; Fuel temperature –40 to +300 °F (–40 to +149 °C); Ambient temperature –40 to +200 °F (–40 to +93 °C)
- EM35MR input voltage: 24 VDC
- Functional Features: Self-cleaning valve design operates in sour gas environments; EM35 actuator provides precise valve positioning; resolver-based feedback for high accuracy; all-electric EM35MR option eliminates hydraulic contamination and maintenance issues.
- Application Scenarios: Industrial gas turbines requiring a 3103 valve with EM35 actuation; applications where the all-electric EM35MR variant is specified for improved reliability and elimination of hydraulic fluid issues.
- Performance Parameters: The EM35MR actuator, when paired with the DVP (Digital Valve Positioner), provides high-speed precise valve control. Corrosion-resistant, self-cleaning design allows operation in high sulfur content gas.
- Material Composition: Corrosion-resistant valve materials; stainless steel housing; through-hardened metering sleeve and seal shoe.
- Structural Characteristics: Rotating metering sleeve and seal shoe; resolver for position feedback; EM35 electro-hydraulic actuator; DVP-compatible ID module for plug-and-play operation (on EM35MR variant).
- Working Principle: Gas flows through the guide tube and metering port whose open area is set by sleeve position. The EM35 actuator (or EM35MR with DVP) drives the sleeve based on control system demand, providing closed-loop fuel flow regulation via resolver feedback.
- Installation Requirements: Read the 3103 Installation and Operation Manual before installation. For EM35MR variants, pair with Woodward DVP driver. Use pre-manufactured connectorized cables or terminal connections as applicable. Ensure 24 VDC power supply for EM35MR. Verify hydraulic supply for electro-hydraulic EM35. Install upstream gas filtration.
- Usage Precautions: Do not operate outside specified pressure, temperature, or electrical limits. Maintain gas cleanliness to protect the valve and actuator. For EM35MR, ensure proper DVP configuration and communication. Regularly inspect resolver feedback signal stability and electrical connector sealing. Follow Woodward OEM maintenance intervals.
