General Information

The Woodward Gas Stop/Ratio Valve performs a dual function for industrial or utility gas turbines. One

function rapidly shuts off fuel to the turbine fuel control system. Another function provides accurate control

of gas fuel pressure at the outlet of the stop/ratio valve. This pressure is applied to the inlets of the gas

fuel control valve.

The Gas Stop/Ratio Valve features a modular design and meets critical control characteristics while

allowing the same valve design to accommodate a variety of stroke, force output, and mechanical

interface arrangements. The electrical and mechanical interfaces have been designed for quick and easy

assembly or removal of the valve, at the factory or in the field. The components include an

on-board hydraulic filter, electrohydraulic servo valve, trip valve, single-acting hydraulic cylinder, and dual

LVDTs (the 6” and 8” valves also have the option for triple LVDTs).