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Woodward 8915-514

  • Product Identity: Per the Woodward 8915‑series parts index, 8915‑514 is a “3103 Valve c/w TM55 Actuator”​ — i.e., a 3103 rotary‑sleeve gas‑fuel metering valve integrally assembled with a TM55 electro‑hydraulic servo actuator.
  • Introduction: Field‑proven fuel‑valve assembly for industrial gas turbines, pairing the 3103 stainless‑steel metering valve with the standard TM55 electro‑hydraulic servo actuator. It is used extensively in steel‑plant, power‑plant, metallurgy, oil‑and‑gas, petrochemical, and process‑industry turbine packages.
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Detailed content

  • Technical Specifications​ (3103 / TM55 family typical values):
    • Valve body: stainless steel; internal parts: hardened stainless steel
    • Actuator housing: anodized aluminum
    • Seals: Viton A
    • Gas flow range: 23 to 18,144 kg/h (50 to 40,000 lb/h)
    • Inlet pressure: up to 6,206 kPa (900 psia)
    • Differential pressure: 172 to 6,206 kPa (25 to 900 psi)
    • Fuel temperature: –40 to +149 °C (–40 to +300 °F)
    • Actuator temperature: –40 to +121 °C (–40 to +250 °F)
    • Hydraulic supply pressure: 2,758 to 6,895 kPa (400 to 1,000 psi)
    • Angular stroke: max 45°
    • Stall torque: 38 N·m @ 2,758 kPa; 95 N·m @ 6,895 kPa
    • Time constant: 0.025 s
    • Input signal: 20 to 200 mA
    • Metering accuracy: ±5% of point or ±0.25% of maximum flow
  • Features: Electro‑hydraulic servo control with mechanical feedback; self‑cleaning rotary sleeve; spring‑biased to minimum‑fuel fail‑safe position; integrally mounted actuator eliminates intermediate linkages.
  • Application Scenarios: Gas‑turbine power generation; mechanical drive; gas compression; process‑industry turbine packages.
  • Materials: Stainless‑steel valve body, hardened stainless internal moving parts, anodized aluminum actuator housing, Viton A seals.
  • Structural Characteristics: 3103 rotary‑sleeve metering valve; TM55 electro‑hydraulic servo actuator directly coupled via adapter plate.
  • Working Principle: Electronic control current drives the torque‑motor servo valve, controlling hydraulic oil to the servo piston that rotates the metering sleeve, regulating fuel flow; mechanical feedback maintains proportional positioning.
  • Installation Requirements: Hydraulic system cleanliness ISO 4406 20/18/15; 10 μm supply filtration; fuel‑gas inlet filtration meeting particle‑size requirements; any‑orientation installation with ensured maintainability.
  • Precautions: Periodically verify hydraulic oil contamination grade; replace clogged filters promptly; calibration data must match the physical serial number; automatic valve closure on loss of pressure is normal fail‑safe behavior.

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