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Product Overview
The WOODWARD 9907-1200 CPC-II current-to-pressure converter is a high-precision electrohydraulic control device designed for critical industrial applications requiring reliable steam turbine valve positioning. As part of Woodward’s CPC-II (Current-to-Pressure Converter II) series, this module converts a 4–20 mA electrical input signal into proportional hydraulic pressure output, enabling precise actuation of single-acting steam turbine governor valves. Its robust design and advanced features make it a cornerstone in power generation, oil & gas, and heavy industrial environments where stability and accuracy are paramount.
Engineered to address industry-wide challenges like oil contamination and mechanical wear, the 9907-1200 incorporates a self-cleaning valve algorithm and corrosion-resistant materials to ensure long-term performance even in harsh conditions. It supports redundant pressure demand inputs from one or two controllers, enhancing system reliability for mission-critical operations. The module’s compact form factor (163 × 38 × 58 mm) and DIN rail mounting compatibility simplify integration into existing control systems, while its fail-safe spring-return mechanism guarantees safe valve closure during power outages or internal failures.
In automation systems, the 9907-1200 acts as a bridge between digital control signals and hydraulic actuation, directly influencing turbine speed and load control. By minimizing valve positioning errors (full-range linearity <0.2%), it reduces mechanical stress on turbine components and improves energy efficiency. Its diagnostic capabilities, including real-time health monitoring of pressure transducers and input signals, enable predictive maintenance and reduce downtime.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 9907-1200 |
| Manufacturer | WOODWARD |
| Product Type | Current-to-Pressure Converter (CPC-II) |
| Input Signal | 4–20 mA DC |
| Output Pressure Range | 0–10 bar (configurable) |
| Supply Voltage | +24 VDC ±10% |
| Power Consumption | ≤1.5 W |
| Physical Dimensions | 163 × 38 × 58 mm |
| Weight | 0.35 kg |
| Operating Temperature | -40°C to +70°C |
| Humidity | 5–95% non-condensing |
| Protection Rating | IP56 |
| Fail-Safe Mechanism | Spring-return to safe position |
| Response Time | <50 ms (90% step change) |
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Key Features and Advantages
Precision Control: The 9907-1200 delivers exceptional accuracy, with a full-range linearity of <0.2% and fast response times (<50 ms), ensuring precise steam turbine valve positioning. This directly translates to improved speed and load control, reducing energy waste and extending equipment lifespan.Whatsapp:+86 18859254943.
Oil Contamination Resistance: Unlike traditional designs, the CPC-II series features a self-cleaning port design and tolerance to oil contamination (ISO 20/16), minimizing downtime caused by particulate fouling. This makes it ideal for environments with poor lubricant quality, such as aging industrial plants.
Redundant Architecture: The module supports dual redundant inputs from controllers, allowing seamless integration into safety-critical systems. In the event of a controller failure, the 9907-1200 automatically switches to the redundant signal, maintaining continuous operation.
Compact and Rugged Design: Weighing just 0.35 kg and measuring 163 × 38 × 58 mm, the 9907-1200 is easy to install in space-constrained environments. Its IP56-rated enclosure and corrosion-resistant materials ensure reliable performance in high-vibration, dusty, or humid conditions.
Diagnostic Capabilities: Built-in health monitoring provides real-time feedback on pressure transducer status, input signal integrity, and internal component health. This enables proactive maintenance and reduces unplanned outages.
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Application Areas
The WOODWARD 9907-1200 CPC-II current-to-pressure converter is widely used in industries where precise turbine control is essential:Whatsapp:+86 18859254943.
- Power Generation: Integrates with steam turbine control systems to regulate valve positions, ensuring stable energy output and grid synchronization. Critical for power plants, combined-cycle facilities, and district heating systems.
- Oil & Gas: Powers control systems in refineries, offshore platforms, and pipeline compressor stations, where reliable valve actuation is vital for process safety and efficiency.
- Industrial Manufacturing: Optimizes steam distribution in factories, such as paper mills and chemical plants, by maintaining consistent pressure and flow rates across production lines.
- Water Treatment: Controls pumps and valves in wastewater treatment plants, ensuring compliance with environmental standards by regulating chemical dosing and flow rates.
- Marine Applications: Used in shipboard steam turbines for propulsion and auxiliary systems, offering robust performance in saltwater environments with high humidity and vibration.
Related Products
- 9907-1105/9907-1106: Earlier CPC-I models replaced by the 9907-1200, offering lower precision and less advanced diagnostic capabilities.
- VOITH E360 Series: Competitive current-to-pressure converters compatible with similar applications but lacking the 9907-1200’s self-cleaning mechanism and redundancy features.
- Woodward 2301A Load Sharing Controller: Works alongside the 9907-1200 to manage power distribution in multi-generator systems, ensuring balanced load sharing and grid stability.
- Woodward 505E Speed Controller: A complementary turbine control module that provides speed setpoints to the 9907-1200, enhancing overall system coordination.
- Woodward Pressure Transducers (e.g., 9907-1210): High-accuracy sensors that feed real-time pressure data to the 9907-1200, enabling closed-loop control and diagnostic feedback.
- Woodward 9907-1220 CPC-II Dual Redundant Model: A higher-end variant with dual internal CPUs and redundant outputs, designed for SIL-rated safety systems.
- Woodward 9907-1230 High-Pressure Variant: Supports up to 25 bar output pressure, suitable for heavy-duty applications like high-pressure steam turbines.
Installation and Maintenance
Installation Preparation:
Before installing the 9907-1200, verify the following:
Before installing the 9907-1200, verify the following:
- Power supply matches the 24 VDC requirement and is properly grounded to prevent electromagnetic interference.
- Hydraulic connections (inlet/outlet ports) are clean and compatible with the system’s oil type (ISO VG 32–46 recommended).
- Mount the module vertically on a DIN rail in a location with adequate ventilation (avoid direct sunlight or extreme temperatures).
- Securely connect the 4–20 mA input signal using shielded cables to minimize noise, following Woodward’s wiring guidelines.
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Maintenance Recommendations:
- Routine Checks: Inspect hydraulic connections monthly for leaks or corrosion. Clean the module’s exterior with a dry cloth to remove dust and debris.
- Oil Quality Monitoring: Test oil samples quarterly for contamination (ISO 20/16 or better). Replace oil if particulate levels exceed specifications to prevent valve blockages.
- Sensor Calibration: Verify pressure transducer accuracy annually using a certified calibrator. Adjust offsets if deviations exceed ±0.5% of full scale.
- Firmware Updates: Check Woodward’s technical support portal periodically for firmware updates, which may include performance optimizations or bug fixes.
- Spare Parts Inventory: Maintain a backup 9907-1200 module to minimize downtime during replacements. Store spare units in a dry, temperature-controlled environment.
Product Warranty
Our company provides a 12-month quality warranty for the WOODWARD 9907-1200 CPC-II current-to-pressure converter, covering hardware defects caused by non-human factors. During the warranty period, we will replace any malfunctioning module free of charge. For discontinued models or urgent requirements, our global supply chain network ensures rapid fulfillment of scarce spare parts, supporting continuous operation of industrial systems.Whatsapp:+86 18859254943.
With 17 years of expertise in industrial control parts distribution, we guarantee competitive pricing, fast delivery, and reliable technical support. Contact us today to optimize your turbine control system with the 9907-1200 CPC-II converter.
Note: All product names, logos, and brands are property of their respective owners. This document is for informational purposes only and does not constitute an official technical manual. Always refer to the manufacturer’s documentation for detailed specifications and installation guidelines.E-mail :sales@ygplc.com.
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