Digital guide
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Woodward 9907-773
Product family: Woodward GS3 gas fuel valve (confirmed in Woodward Governor digital modules & miscellaneous parts catalog as “9907-773 GS3 Valve”).
Product brief: The 9907-773 is a GS3-series gas fuel valve used for metering fuel gas to industrial and aircraft gas turbine engines. It is an electronically driven valve with a self-cleaning shear-type metering action.
Detailed content
Key specifications:
- Valve type: Electrically driven gas control valve
- Metering action: Self-cleaning shear-type, protects the control port from contamination
- Drive: Dual resolver + dual flexure drive plates (GS6-class architecture; GS3 is the smaller sibling)
- Fuel gas / ambient temperature capability: up to 200 °F (93 °C)
- Suitable for fuel gas or air
Functional highlights: Precise gas-flow metering via resolver-positioned rotary sleeve; self-cleaning shear gap resists fouling from dirty fuel gas; accepts 4–20 mA or equivalent command.
Applications: Fuel control for industrial gas turbines and aircraft gas turbine engines.
Installation & safety notes: Install per the relevant Woodward GS3 valve manual; verify fuel gas cleanliness (filtration to 20 µm or finer is typical for the GS family). Confirm the command signal range and resolver excitation before applying hydraulic/electric power. Fuel gas at up to 93 °C demands appropriate sealing and bonding; ensure the valve body is properly grounded.
