July 16, 1985 - Maritime Reporter and Engineering News

Hydraulic Governor Valve Control Surpasses Initial Expectations

A year after its introduction by the Power Division of the Skinner Engine Company, Erie, Pa., the first hydraulically actuated governor valve control for controlling steam turbine speed has performed even better than initial expectations.

Data gathered from dozens of installations around the country reveal a record of unsurpassed economy, adaptability and dependability.

The Skinner SPR™System—powered by the Woodward TG-13 constant speed governor— requires fewer adjustments following initial start-up than comparable governor valve controls because it is a closed system with no mechanical wear points. It instantly corrects variations in pre-set turbine speed without the "hunting" for correct speed found in standard mechanical linkage controls.

The SPR system is free from the shock loads and backlashes which can cause the levers, arms and pins of mechanical systems to weaken or break prematurely. The system's elimination of speed correction turbulence also helps extend the life of the governor valve, cage and stem, and the absence of any mechanical linkage reduces maintenance costs.

At slight underspeed or overspeed conditions, the movement of a rotary actuator in the SPR system initiates a chain of events in the hydraulic system which opens or closes the steam inlet to provide immediate response to speed variations.

The Skinner SPR system also produces a substantial increase in the power available at the governor valve.

The Skinner SPR system is a retrofit package made for all popular types of single stage steam turbines. It is presently available in configurations for Coppus, Elliot and Terry turbines with others available upon application.

For more information and free literature on Skinner's SPR system, Circle 52 on Reader Service Card

Other stories from July 16, 1985 issue


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