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Woodward 8915-185

  • Product Name: 3103 Gas Valve with TM55P Electro‑Hydraulic Proportional Actuator (3103 / TM55P configuration)
  • Introduction: Integrated assembly of a 3103 stainless‑steel gas valve and a TM55P electro‑hydraulic proportional actuator, designed for natural‑gas fuel metering of industrial gas turbines, delivering high responsiveness, high accuracy, and high reliability through electro‑hydraulic servo technology.
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Detailed content

  • Technical Specifications:
    • Valve body: stainless steel; internal moving parts: hardened stainless steel
    • Actuator housing: aluminum
    • Seals: Viton A
    • 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: 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 proportional servo control with excellent dynamic performance; optional dual‑coil torque motor for redundant control; internal mechanical feedback for open‑loop accuracy; optional RVDT electrical position feedback; self‑cleaning sleeve structure suitable for sour and particulate‑laden gas; spring‑biased toward minimum‑fuel position for fail‑safe operation.
  • Application Scenarios: Gas‑turbine power generation and combined heat & power (CHP); natural‑gas compression and treatment; mechanical drive systems; sour‑gas and high‑sulfur fuel environments.
  • Materials: Stainless‑steel valve body, hardened stainless internal moving parts, aluminum actuator housing, Viton A seals.
  • Structural Characteristics: 3103 rotary‑sleeve metering valve; integrally mounted TM55P electro‑hydraulic servo actuator; adapter plate with adjustable limit switch.
  • Working Principle: Electronic control current is amplified by the torque‑motor servo valve to control hydraulic oil that drives the servo piston, rotating the metering sleeve to regulate fuel flow. Mechanical feedback guarantees accuracy.
  • 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: Regularly test hydraulic oil contamination grade; replace clogged filters in time; valve calibration data must be consistent with the physical serial number; automatic closure on pressure loss is normal protection behavior.

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