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Woodward 8915-839
Product Name: Woodward 8915-839 — 1907 Large Liquid Valve & Actuator Assembly
Product Description: The 8915-839 is a 1907 Large Liquid Valve and Actuator assembly for gas turbine liquid fuel metering applications. It shares identical functional and technical characteristics with the 8915-815 assembly described above, providing precise fuel metering across a wide flow range.
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Technical Specifications: Identical to 8915-815 — Metered fuel flow 30:1 turndown, maximum 11,340 kg/h (25,000 lb/h); fuel inlet pressure up to 9,377 kPa (aluminum body) or 17,238 kPa (stainless steel body); differential pressure 345–827 kPa; fuel viscosity 0.5–12.0 cSt; specific gravity 0.77–0.91.
Fuel Compatibility: Diesels, kerosenes, gasolines, distillates, naphtha, gas turbine fuels, fuel oils, biodiesel, ultra-low sulfur diesel with lubricity additives.
Functional Features: Differential pressure regulated metering; constant flow delivery independent of discharge pressure variations; available in multiple flow range configurations.
Application Scenarios: Industrial gas turbine liquid fuel control in power generation, oil & gas, and marine sectors.
Material Composition: Aluminum or stainless steel valve body; through-hardened stainless steel internals; FKM elastomer seals.
Working Principle: The integrated actuator positions the hollow plunger within the ported sleeve. The differential pressure regulator ensures a constant pressure drop across the metering port, delivering stable fuel flow proportional to valve position.
Installation Requirements: Square mounting with governor/actuator linkage; actuator travel allocation of two-thirds between min/max with remaining third split at the endpoints; shielded electrical wiring.
Usage Precautions: Maintain fuel filtration at 20 μm or finer; limit water content to 0.1% by volume; read all Woodward publications before installation and service; follow plant safety protocols.
