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Woodward 8915-191

  • Product Name: 3103 Gas Valve with TM55P Electro‑Hydraulic Proportional Actuator (3103/TM55P configuration)
  • Introduction: Integrated device combining a 3103 stainless‑steel gas valve with a TM55P electro‑hydraulic proportional actuator, using the standard 3103/TM55P configuration, purpose‑built for industrial gas‑turbine natural‑gas fuel metering. It delivers high responsiveness, high accuracy, and high reliability through electro‑hydraulic servo technology.
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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
    • Input signal: 20 to 200 mA
    • Metering accuracy: ±5% of point or ±0.25% of maximum flow
  • Features: Electro‑hydraulic proportional servo control with superior dynamic performance; optional dual‑coil torque motor for redundant control; internal mechanical feedback ensures open‑loop accuracy; optional RVDT electrical position feedback; self‑cleaning sleeve structure adapts to sulfur‑containing and particulate‑laden gases; spring bias to minimum‑fuel direction guarantees fail‑safe operation.
  • Application Scenarios: Gas‑turbine power generation and CHP; natural‑gas compression and treatment; mechanical drive systems; sour‑gas and high‑sulfur fuel environments.
  • Performance: At 1,000 psi hydraulic pressure the actuator delivers 95 N·m stall torque and a 0.025‑second time constant, sufficient for fast gas‑turbine load transients. The 3103 valve covers 50 to 40,000 lb/h flow.
  • Materials: Stainless‑steel valve body, hardened stainless internal parts, anodized aluminum actuator housing, Viton A elastomeric seals.
  • Structural Characteristics: Rotary‑sleeve metering valve with integrally mounted electro‑hydraulic servo actuator. The valve body has an inlet flow‑deflector tube; sleeve bearings are isolated from gas seals. The actuator is a torque‑motor / spool‑valve / servo‑piston structure with mechanical feedback.
  • Working Principle: Electronic control current drives the torque motor, which through the hydraulic servo system pushes the piston and output shaft, adjusting the metering‑sleeve opening. Mechanical feedback keeps the valve position in precise proportion to the input signal.
  • Installation Requirements: Hydraulic cleanliness ISO 4406 20/18/15; 10 μm supply filtration; fuel‑gas filtration to ≤30 ppm particles under 10 μm; any‑orientation mounting; adequate maintenance clearance.
  • Precautions: Maintain hydraulic system cleanliness; replace hydraulic filters regularly; calibration documents must match the valve serial number; wiring in explosive‑hazard areas must follow code.

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