1. Woodward 9907-1106 | Original CPC-II Valve Controller

2. Unboxing & Physical Snapshot

• Model & Brand: Woodward CPC-II 9907-1106
• Product Type: Current-to-Pressure Converter (CPC-II) for electrohydraulic turbine valve control applications. The unit converts an isolated 4–20 mA electrical command signal into proportional hydraulic output pressure for controlling single-acting steam turbine valve servos.
• Application Area: Steam turbine governor systems, turbine valve positioning, and industrial power generation control equipment.
• Approximate Physical Dimensions (W × H × D):
  • Approximately 290 × 270 × 270 mm (configuration/reference dependent).
• Estimated Shipping Weight:
  • Unit weight: approximately 25 kg / 55 lb class (dry weight reference).
  • Typical packaged shipping weight: 28–32 kg
• What’s in the Box:
  • Woodward CPC-II 9907-1106 Current-to-Pressure Converter
  • Hydraulic connection interfaces
  • Electrical terminal connections
  • Mounting hardware when supplied
  • Protective packaging
  • Documentation package when available

3. Product Introduction

The Woodward 9907-1106 is installed as a hydraulic control interface between an electronic turbine governor and a steam valve actuator. The CPC-II receives a 4–20 mA command signal and regulates hydraulic pressure to position the turbine valve servo accurately. This unit is designed for applications requiring controlled pressure conversion in turbine speed and load regulation systems (—which is critical where valve positioning accuracy directly affects generator output stability).

This component requires strict mechanical and hydraulic verification before replacement. Confirm pressure range, oil supply conditions, wiring configuration, and hazardous-area requirements before installation. Check the nameplate. Check the hydraulic ports. A CPC-II with the same housing may not match the required pressure configuration.

4. Core Technical Specifications

Parameter	Value
Manufacturer	Woodward
Model	9907-1106
Product Family	CPC-II Current-to-Pressure Converter
Application	Steam turbine valve servo control
Input Signal	Isolated 4–20 mA
Input Impedance	Approximately 250 Ω
Hydraulic Supply Pressure	Up to 25 bar (363 psi)
Control Pressure Range	0–10 bar (0–145 psi)
Output Type	Hydraulic pressure output
Supply Voltage	18–32 VDC
Steady-State Current	Approximately 1.5 A
Peak Current	Up to 8 A for 100 ms
Analog Output	4–20 mA
Output Load Capability	Up to 300 Ω
Response Time	Approximately 10–30 ms
Accuracy	Approximately ±0.2% full scale
Repeatability	Approximately 0.1% full scale
Communication Interface	RS-232 service port
Mounting	Hydraulic manifold / industrial mounting arrangement
Housing Material	Anodized aluminum
Protection Rating	IP56 (installation dependent)
Hazardous Area Rating	Class I Division 2 / ATEX Zone 2 configuration
Weight	Approx. 25 kg

Woodward 9907-1106

5. ? Global Compliance & Industry Certifications

Expected regulatory approvals for the Woodward 9907-1106 include:

• CE Mark
  • Applies to compliant installations meeting applicable EMC and machinery requirements.
• UL/cUL Recognition
  • May apply depending on system configuration and installation requirements.
• ATEX / IECEx
  • The 9907-1106 configuration is associated with hazardous-area applications including Class I, Division 2 and ATEX Zone 2 classifications. Verify the exact nameplate marking before installation.
• Marine Approvals (DNV GL)
  • Applicable only when installed within a certified marine turbine control system.

Certification verification is essential because the CPC-II operates in turbine control environments where hydraulic output errors can affect valve position, overspeed protection, and plant safety.

Verify specific lot certifications with OEM.

6. ? Long-Term Storage & Asset Preservation Guide

Store the Woodward 9907-1106 in a clean, temperature-controlled warehouse. Keep hydraulic ports sealed with protective caps to prevent contamination entering the precision valve assembly.

Maintain humidity below 60% RH. Moisture can affect electrical terminals, internal electronics, and aluminum housing surfaces.

Inspect stored units before installation. Verify connector condition, hydraulic sealing surfaces, mounting bolts, and nameplate data. For long-term storage, rotate inventory periodically and maintain a documented preservation record (—especially important for turbine control spares kept for emergency outage support).

Avoid storing directly on concrete floors where condensation exposure can occur.

7. Physical Installation Prerequisites

• Install the CPC-II on a rigid mounting surface suitable for turbine control equipment.
• Confirm hydraulic supply, control pressure, and drain connections match system drawings.
• Verify oil cleanliness before connecting hydraulic lines.
• Use correct filtration practices for hydraulic supply.
• Connect 18–32 VDC power supply with proper polarity.
• Use shielded wiring for 4–20 mA signal connections.
• Connect protective grounding according to plant electrical standards.
• Maintain sufficient clearance around the housing for inspection and service access.
• Leave approximately 50 mm minimum clearance around service areas where cabinet or skid design permits.
• Perform calibration and functional testing before turbine operation.

8. Buyer’s FAQ (Logistics & Compliance Focus)

Q: What HS Tariff Code is commonly used for the Woodward 9907-1106?

A: The CPC-II is commonly reviewed under HS 9032 categories for automatic regulating or controlling instruments, although customs classification depends on the declared function and importing-country interpretation.

Q: Why does Country of Origin (COO) matter for this turbine control component?

A: COO affects customs clearance, duty treatment, and traceability documentation. Ensure the commercial invoice, packing list, and certificate of origin contain matching manufacturer and part information.

Q: Is shipping insurance recommended for the 9907-1106?

A: Recommended. The unit contains precision hydraulic components, electronic control circuits, and machined internal valve assemblies. Transit shock or contamination can affect calibration performance.

Q: Does the 9907-1106 include the latest firmware pre-loaded?

A: The CPC-II contains internal electronics and configuration parameters rather than a user-loaded PLC application. Verify the installed configuration, calibration settings, and compatibility with the turbine governor system before commissioning.