The Woodward 9905-970 is an analog speed control and governor module engineered for precise speed regulation of engines and turbines in industrial settings. Operating on analog circuitry, this module provides closed-loop control by comparing the actual speed (measured via magnetic pickups or tachometers) with a setpoint, generating corrective output signals to adjust fuel valves or actuators accordingly. It is designed for compatibility with Woodward's hydraulic and electro-hydraulic governor systems, ensuring stable speed maintenance under load variations, transient conditions, and during startup/shutdown sequences. The module features robust construction for industrial environments, offering noise immunity, thermal stability, and straightforward integration into existing control panels. Typical applications include speed governing of diesel engines in power generation, gas turbines in mechanical drive systems, and steam turbines in process industries. The 9905-970 exemplifies Woodward's legacy in analog control technology, delivering reliability and precision for critical speed regulation tasks.

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