Fly ball governor in the hydrualic control

How the fly ball governor is used along with the hydraulic control?

E

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As soon as the turbine speeds up, weights are moved outward through the centrifugal force, resulting in the linkage to open the pilot valve which admits and releases the oil on the either side of piston or on one side of the spring-loaded piston. Steam valves controls the movement of piston.

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