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Woodward 8915-148

Possible Family Association:​ Based on Woodward 8915-series numbering conventions and proximity to verified parts (8915-123 Control Valve-Gas Fuel TM55P/3103 Hi Temp 1″ Port; 8915-185 3103/TM55P), 8915-148 likely belongs to the 3103 gas valve with TM55P electro-hydraulic actuator family, or potentially the 1907 liquid fuel valve / TM55P family, or the 3151A water valve / TM40 family.

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Detailed content

Verified 3103/TM55P Family Baseline (from Woodward official manual 40106):
  • Valve Construction: Stainless steel body, through-hardened stainless steel internals
  • Inlet guide tube conditions flow and directs contaminants through metering port
  • Sleeve support bearings positively sealed from gas
  • TM-55P Actuator: Anodized aluminum housing; through-hardened stainless steel internals
  • 40 µm filter fitting on hydraulic supply pressure inlet
  • Internal mechanical feedback standard; optional RVDT electrical position transducer (±0.16° accuracy)
  • Adapter housing with adjustable maximum/minimum flow stops and adjustable minimum position indicator switch
  • Flow Range: 23 to 18,144 kg/h (50 to 40,000 lb/h)
  • Inlet Pressure: 6,206 kPa (900 psia) maximum; 4,964 kPa (720 psia) CE limit
  • Differential Pressure: 172 to 6,206 kPa (25 to 900 psi)
  • Gas Temperature: -40°C to +149°C
  • Metered Fuels: Natural gas, propane, methane; specific gravity 0.5–1.05
  • Flow Accuracy: ±5% of point or ±0.25% of maximum flow; ±2% at stops
  • Hydraulic Supply: 400 to 1,000 psig external supply oil
Alternative Possibility — VariStroke-II Linear Actuator (if 8915-148 is a linear actuator variant):
  • Linearity: ±1.0% of full range
  • Repeatability: ±0.5% of full range
  • Temperature Drift: 0.04%/°C
  • Fail-safe: Internal return spring on servo valve
  • Open Slew Rate: >200 mm per second (8 inches/s)
  • Close/Trip Slew Rate: Up to 254 mm per second (10 inches/s)
  • Stroke Lengths: 50–457 mm (2–18 inches) depending on model
  • Max Stall Force: 450–18,000 kg @ 35 bar (1,000–40,000 lb @ 500 psi)
  • Cylinder Bore Sizes: 102, 152, 254, 305 mm (4, 6, 10, 12 inches)
  • Configuration: Computer-based Service Tool via RS-232
Working Principle (3103/TM55P):​ Electronic control current drives the dry-coil torque motor servo valve, controlling hydraulic oil to a double-acting servo piston. Piston motion rotates the valve output shaft, changing the 3103 metering sleeve position. Internal mechanical feedback re-centers the servo valve for precise proportional control. On hydraulic or power loss, the spring biases the valve to minimum fuel.
Installation & Precautions:​ Maintain hydraulic oil cleanliness to ISO 4406 20/18/15; 10 µm filtration on supply; install per flow direction markings on valve body; configure gas filters upstream and downstream as required; independent piping support to avoid stress on valve body; perform purging, leak testing, and full-stroke functional verification before commissioning. Gas cleanliness directly affects valve life — strictly control contaminant limits. Prohibit operation beyond design pressure or temperature ranges.
Note:​ The exact product type, port configuration, and certification of 8915-148 require Woodward factory confirmation with the serial number. The above represents the most probable family associations based on verified adjacent 8915-series parts, not a verified specification for 8915-148.

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