Overview

The Woodward 8901-457 CPC (Current-to-Pressure Converter) Valve is a flagship model in Woodward’s CPC series, designed to deliver linear, repeatable hydraulic control in harsh environments. It transforms standard 4–20 mA control signals into 0–25 bar hydraulic pressure, enabling accurate positioning of single-acting actuators and servo systems.

Its 316L stainless steel valve body and IP65-rated die-cast aluminum housing ensure corrosion resistance and durability in offshore platforms, ship engine rooms, and chemical plants. The CPC valve features LED indicators, Modbus interface, and single-port diagnostics, simplifying integration and maintenance.

The 8901-457 is compatible with Woodward control systems such as 505, 505E, and MicroNet, and supports hot-swap replacement without system shutdown. Its fast response time (<10 ms) and repeatability (±0.5% FS) make it ideal for critical control loops in rotating machinery.

Technical Data

Typical Applications

• Marine Propulsion and Engine Control: Regulates fuel valves, turbochargers, and exhaust dampers in ship engines.

• Gas and Steam Turbine Systems: Drives actuator positioning in turbine governor loops.

• Compressor and Pump Control: Enables precise modulation of inlet guide vanes and bypass valves.

• Offshore and Chemical Plants: Operates reliably in hazardous zones with ATEX-certified protection.

• Power Generation Facilities: Supports emergency shutdown and load balancing systems in addition to standard control.

FAQ

Q1: What control signal does the 8901-457 CPC Valve accept?
A1: It accepts standard 4–20 mA analog signals.

Q2: Can it be used in hazardous environments?
A2: Yes, it is certified for ATEX Zone 2 and IECEx applications.

Q3: Is hot-swap replacement supported?
A3: Yes, the valve can be replaced online without shutting down the system.

Q4: What systems is it compatible with?
A4: It integrates with Woodward 505, 505E, and MicroNet control platforms.

Q5: What maintenance is recommended?
A5: Annual step-response testing and biannual oil cleanliness checks are advised for optimal performance.