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Woodward 8915-413

  • Product Name: 3103 Gas Valve with TM55I Electro‑Hydraulic Integral Actuator (3103/TM55I configuration)
  • Introduction: Integrated assembly combining a 3103 stainless‑steel gas valve with a TM55I electro‑hydraulic integral actuator. The TM55I is an integrating actuator providing internal integral action, suited to gas‑turbine fuel‑metering systems that require integral control. This configuration adds integral characteristics on top of the standard electro‑hydraulic servo, eliminating steady‑state error and improving control precision.
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Detailed content

  • Technical Specifications:
    • Manufacturer: Woodward, Inc.
    • Assembly: 3103 gas valve + TM55I electro‑hydraulic integral actuator
    • Configuration: 3103 / TM55I
    • Valve body: stainless steel; internal parts: hardened stainless steel
    • Actuator housing: anodized aluminum
    • 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 type: natural gas, propane, methane
    • 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 integral servo control eliminating steady‑state position error; high‑torque output to overcome friction from gas contaminants; combination of internal mechanical feedback and integral action; self‑cleaning rotary‑sleeve design; spring‑biased to minimum‑fuel direction for fail‑safe protection; inlet flow‑deflector tube prevents contaminant deposition; metering bearing isolated from gas seal.
  • Application Scenarios: Gas‑turbine systems with high control‑accuracy demands; industrial power generation and mechanical drive; natural‑gas compression and treatment; fuel‑metering loops requiring integral control.
  • Performance: Actuator time constant 0.025 s, maximum slew rate 920 °/s, stall torque 95 N·m at 1,000 psi.
  • Materials: Stainless‑steel valve body, hardened stainless internal parts, anodized aluminum actuator housing, Viton A seals.
  • Structural Characteristics: 3103 rotary‑sleeve metering valve with integrally mounted TM55I electro‑hydraulic integral 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. The integral characteristic eliminates steady‑state error; mechanical feedback guarantees dynamic 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 wiring and hydraulic‑interface accessibility.
  • Precautions: Periodically test hydraulic oil contamination grade; replace clogged filters promptly; valve calibration data must match the physical serial number; integral‑parameter configuration must comply with system requirements.

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