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Woodward 8915-305

  • Product Name: 3103 Gas Valve with TM55P Electro‑Hydraulic Proportional Actuator (3103/TM55P configuration)
  • Introduction: Standard integrated assembly of a 3103 stainless‑steel gas valve and a TM55P electro‑hydraulic proportional actuator, intended for industrial gas‑turbine applications requiring reliable natural‑gas fuel metering across power‑generation, mechanical‑drive, and gas‑compression duties.
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Detailed content

  • Technical Specifications:
    • Manufacturer: Woodward, Inc.
    • Assembly: 3103 gas valve + TM55P electro‑hydraulic actuator
    • Configuration: 3103 / TM55P
    • 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 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
    • Maximum slew rate: 920 °/s
    • Input signal: 20 to 200 mA
    • Metering accuracy: ±5% of point or ±0.25% of maximum flow
  • Features: Electro‑hydraulic servo proportional control with fast response and high torque; internal mechanical feedback for high positioning accuracy; self‑cleaning rotary sleeve for long‑term stability; spring‑loaded to minimum position for loss‑of‑pressure protection; optional dual‑coil redundancy; optional electrical position sensor; inlet flow‑deflector tube prevents contaminant deposition.
  • Application Scenarios: Industrial gas‑turbine power generation; natural‑gas compressor stations; mechanical drive packages; conventional and low‑emission combustion systems; dirty‑gas environments.
  • Performance: Actuator time constant 0.025 s, maximum slew rate 920 °/s, stall torque 95 N·m at 1,000 psi, hysteresis 0.25°, repeatability 0.25°. The 3103 valve flows 50 to 40,000 lb/h with ±5% of point metering accuracy.
  • Materials: Stainless‑steel valve body, hardened stainless internal moving parts, anodized aluminum actuator housing, Viton A elastomer O‑rings with PTFE cap seals.
  • Structural Characteristics: Rotary‑sleeve metering valve with integrally mounted electro‑hydraulic proportional 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: Periodically 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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