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Woodward 8915-1027
Product Name: 3103 Series Gas Valve and Actuator Assembly (Woodward 8915-1027)
Product Description: Publicly available detailed technical documentation specific to part number 8915-1027 is limited. Based on Woodward’s 8915-series product platform, 8915-1027 belongs to the family of 3103 gas valve and actuator combination units designed for industrial gas turbine fuel control. These assemblies pair a 3103 stainless steel rotary sleeve metering valve with an electric (EM-35/EM35MR) or electro-hydraulic (TM-55/TM-55P) actuator, factory-matched and calibrated for direct installation.
Detailed content
Technical Specifications (per Woodward 3103 valve platform data applicable to the 3103/actuator family):
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Valve Type: 3103 series stainless steel gas valve
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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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Self-cleaning rotary sleeve and shoe metering structure
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Fuel filtration requirement: 25 micron absolute
Key Features (platform-level for 3103 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
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Sleeve support bearings sealed from gas
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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 actuator 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
Working Principle: Depending on the specific actuator paired with the 3103 valve, the working principle follows either fully electric drive (EM-35/EM35MR) or electro-hydraulic drive (TM-55). For electric versions, the controller commands the driver to energize a brushless DC motor, which after planetary gear reduction drives the metering sleeve via a torsion coupling; the resolver provides closed-loop position feedback. For electro-hydraulic versions, a torque motor servovalve converts electrical input into hydraulic pressure to drive a servo piston that rotates the output shaft. In all versions, the 3103 valve meters fuel flow via its rotary sleeve and shoe structure, and fails to minimum fuel position on loss of power.
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: solids <10 microns not exceeding 30 ppm; >10 microns not exceeding 0.3 ppm.
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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.
