Woodward 9907-1200

Woodward 9907-1200

Product Introduction
The Woodward 9907-1200 is a specialized digital controller designed for precise extraction pressure regulation in steam turbines. It manages the extraction valve to maintain constant pressure for process steam or feedwater heating, while coordinating with the inlet valve for speed and load control.

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Description

Woodward 9907-1200

Technical Specifications

  • Control Type: Microprocessor-based extraction pressure control.
  • Input Signal: 4-20 mA from extraction pressure transmitter.
  • Output Signal: Analog output to extraction valve actuator.
  • Coordination: Cross-limiting logic with inlet valve control.
  • Power Supply: Universal AC/DC power input.

Functional Features

  • Extraction Pressure Control: Maintains constant extraction pressure under varying load conditions.
  • Cross-Limiting: Prevents inlet valve from closing before extraction valve is fully open, and vice versa.
  • Ramp Control: Programmable extraction pressure ramp rates during start-up and load changes.
  • Fail-Safe Position: Configurable fail-safe position for extraction valve on loss of signal.

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