Description
Woodward 9907-1228
Technical Specifications
- Product Model: 9907-1228
- Manufacturer: Woodward
- Product Type: CPC-II Current-to-Pressure Converter
- Input Signal: 4-20mA DC
- Output Pressure: 3-15psi
- Accuracy: ±0.5% of span
- Supply Pressure: 20psi minimum, 30psi maximum
- Air Consumption: 0.5 SCFM at 20psi
- Operating Temperature: -40°C to +85°C
- Housing Material: Aluminum
- Weight: 2.3kg
- Mounting: Panel or DIN rail
- Certifications: CE, ATEX
Functional Features
- Superior Signal Conversion: Delivers superior signal conversion performance with its precision-engineered mechanism and advanced calibration technology.
- Rugged Construction: Features a rugged aluminum housing that provides excellent protection against environmental factors while maintaining thermal stability.
- Field Calibration: Features zero and span adjustments for easy field calibration, reducing installation and maintenance time.
- Low Air Consumption: With its low air consumption and high reliability, the 9907-1228 ensures continuous operation in critical control loops.
- Compact Design: The converter’s compact design allows flexible installation in space-constrained locations.
Application Scenarios
- Process Industries: Widely used in process industries requiring precise pneumatic control from electronic signals.
- Oil Refineries: In oil refineries, it converts DCS outputs to pneumatic signals for control valve operation.
- Chemical Plants: Chemical plants utilize the 9907-1228 for accurate pressure control in reactor systems.
- Power Generation: Power generation applications benefit from its reliability in turbine control systems.
- Pulp and Paper: Deployed in pulp and paper mills where robust signal conversion is essential for process consistency.
- Hazardous Areas: Its ATEX certification makes it suitable for hazardous area installations.
Performance Parameters
- Accuracy: ±0.5% of span
- Air Consumption: 0.5 SCFM at 20psi
- Operating Temperature: -40°C to +85°C
Material Composition
- Housing Material: Aluminum
Structural Characteristics
- Weight: 2.3kg
- Mounting: Panel or DIN rail
Working Principle
The 9907-1228 receives a 4-20mA DC current signal from an electronic controller and converts it to a proportional 3-15psi pneumatic output signal. This pneumatic signal is then used to position pneumatic actuators on control valves, providing precise flow or pressure control.
Installation Requirements
- Air Supply Verification: Before installing, verify proper air supply quality and pressure. Ensure clean, dry instrument air with appropriate filtration.
- Mounting Preparation: Prepare mounting surface and verify adequate clearance for maintenance access.
- Pneumatic Connections: Keep pneumatic connections clean and free of contaminants.
