Woodward 9907-1200 CPC-II Current to Pressure Converter

The Woodward 9907-1200 CPC-II (Current to Pressure Converter) is a high-performance electro-pneumatic transducer designed for precise valve actuator control in industrial, power generation, and turbine control applications. It translates electrical current input signals into proportional pneumatic output, enabling accurate valve positioning for optimal engine or turbine performance.

The CPC-II model is the successor to Woodward’s original CPC line, with advanced features, higher reliability, and broader compatibility with electronic control systems. Built to withstand harsh operating environments, it supports high-speed response, excellent repeatability, and flexible installation options.

This converter is typically used in conjunction with Woodward controllers such as the 505, 723, and Micronet systems, forming a core part of closed-loop turbine control architectures.

Product Specifications

Product Applications

The Woodward 9907-1200 CPC-II is designed for high-reliability applications that require the conversion of control signals into pneumatic action. It is widely used in:

• Steam and Gas Turbine Control

  For precise valve actuation in turbine governors and fuel controls.

• Process Control Systems

  In oil refineries and chemical plants for pressure/flow modulation.

• Power Plants

  As part of steam valve systems, controlling pressure stages with speed and accuracy.

• Compressor Control

  Pneumatic valve actuation in gas compression stations and refrigeration cycles.

• Marine Propulsion Systems

  For actuation in power control loops on ships and offshore platforms.

• Industrial Engines and Boilers

  Controls air, steam, or gas valves for safe and efficient operations.

Product Advantages

• High Accuracy and Repeatability

  Delivers consistent pressure output even under fluctuating conditions.

• Fast Response Time

  Ensures tight control over fast-acting valves, ideal for dynamic load environments.

• Robust Construction

  Built to handle vibration, temperature extremes, and contaminated environments.

• Flexible Installation

  Can be mounted in any orientation and integrated with a variety of systems.

• Low Maintenance Design

  Fewer moving parts and integrated diagnostics reduce service intervals.

• Global Compliance

  Certified for hazardous and industrial locations across global markets.

Frequently Asked Questions (FAQ)

1. What does the CPC-II 9907-1200 do?

   It converts a 4–20 mA electrical signal into a proportional pneumatic pressure signal for valve actuation.

2. Can the CPC-II be used with steam or gas turbines?

   Yes, it is specifically designed for use in turbine control systems for accurate valve regulation.

3. Is the device suitable for hazardous environments?

   Yes, it meets ATEX, UL, and CSA certifications for use in explosive or industrial settings.

4. What type of control signal does it accept?

   The CPC-II accepts a standard 4–20 mA current input.

5. What pressure range can it output?

   It provides an output pressure of up to 2.0 bar (30 psi), configurable to system needs.

6. Does it work with Woodward controllers like 505 or 723?

   Yes, it is fully compatible with Woodward’s governor and controller product lines.

7. What type of air supply is required?

   Clean, dry air with a supply pressure between 3.5–10 bar (50–150 psi).

8. Can the CPC-II be mounted in any orientation?

   Yes, it supports mounting in any position without affecting performance.

9. Does the unit support any communication or diagnostics?

   Yes, it includes local diagnostics and can be ordered with optional HART capability.

10. What is the response time of the CPC-II?

    The device typically responds in less than 100 milliseconds, ensuring rapid control.