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Woodward 8915-1029
Product Description: 8915-1029 is identified in Woodward parts listings as a Gas Valve. Based on Woodward’s 8915-series product architecture, it belongs to the family of gas fuel valve and actuator assemblies designed for industrial gas turbine fuel control. The 8915-series gas valve assemblies typically pair a 3103 stainless steel rotary metering valve with either an EM-35/EM35MR electric actuator or a TM-55 electro-hydraulic actuator, factory-matched and calibrated.
Detailed content
Technical Specifications (per Woodward 3103 valve platform data for the gas valve family):
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Valve Type: 3103 series stainless steel gas metering valve (typical for 8915-series gas valve assemblies)
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Metering Flow Range: 23–18144 kg/h (50–40000 lb/h) natural gas
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Maximum Fuel Supply Pressure: 6205 kPa (900 psia)
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Differential Pressure Range: 172–6205 kPa (25–900 psi)
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Gas Temperature Range: -40°C to +149°C (-40°F to +300°F)
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Ambient Temperature Range: -40°C to +93°C (-40°F to +200°F) for electric actuator versions
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Self-cleaning rotary sleeve and shoe metering structure
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Fuel filtration requirement: 25 micron absolute
Key Features (platform-level for 8915-series gas valve assemblies):
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Stainless steel valve body with through-hardened stainless steel internal parts
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Self-cleaning, shear-type metering action resistant to gas condensate and contaminants
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Inlet guide tube minimizes contaminant accumulation in valve housing
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Sleeve support bearings sealed from gas
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Optional electrical position transducer
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Available with electric (EM-35/EM35MR) or electro-hydraulic (TM-55) actuators
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Fail-safe spring return to minimum fuel position on loss of power (electric versions)
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Explosion-proof designs with CSA and ATEX certifications
Application Scenarios:
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Industrial gas turbine fuel control
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Gas compressor driver fuel management
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Combined heat and power (CHP) systems
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Distributed energy stations
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Dry low-emission (DLE) gas turbine fuel metering
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Marine and offshore platform gas power units
Material Composition (platform-level):
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Valve Body: Precision cast stainless steel
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Metering Sleeve and Shoe: Fully hardened stainless steel, precision lapped
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Seals: Fluororubber (FKM) or other fuel-resistant elastomer
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Actuator Housing (electric versions): Cast aluminum explosion-proof enclosure
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Coupling: Stainless steel torsion coupling
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Motor (electric versions): Samarium-cobalt permanent magnet brushless DC motor
Working Principle: Depending on the specific actuator configuration, the valve operates as follows: The electronic controller sends a position command to the driver (electric) or directly to the torque motor servovalve (electro-hydraulic). The drive mechanism rotates the output shaft, which directly drives the 3103 valve’s metering sleeve to change the opening via a stainless steel torsion coupling. The position feedback (resolver for electric, electrical position sensor for electro-hydraulic) closes the loop. The 3103 valve meters fuel flow via its rotary sleeve and shoe structure. On loss of power, the spring returns the valve to minimum fuel position (fail-safe).
Installation Requirements:
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Handle the unit carefully to avoid damage to seals and factory calibration.
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Protect fuel connection ports when not connected to formal piping.
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Ensure precise alignment between actuator and valve adapter.
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Configure 25-micron absolute fuel filtration at inlet.
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Follow hazardous location wiring methods for electrical connections; use shielded cable and proper grounding.
Usage Notes:
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Maintain strict fuel cleanliness standards per Woodward specifications.
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Avoid operation under overpressure, overtemperature, or out-of-range voltage conditions.
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Follow Woodward-recommended maintenance intervals; return to factory for overhaul upon expiration.
