Name: Woodward 9907-1472 - RUNSHENG
Price: 8888.00 CNY
Availability: InStock

Woodward 9907-1472

The 9907-1472, being a V45TD series actuator, is built for high precision and reliability in critical industrial applications, particularly in the control of steam turbines. It functions as an interface between an electronic control system and the mechanical components it operates.

Here’s how it generally works: An external controller (like a Woodward MicroNet or other turbine control system) sends a 4–20 mA electrical signal, which represents a desired oil pressure. The 9907-1472 actuator receives this signal. Internally, it contains a high-precision pressure sensor that continuously monitors the actual oil pressure being supplied to the turbine valve. A built-in PID (Proportional-Integral-Derivative) controller then compares the desired pressure with the actual pressure. Based on this comparison, it precisely adjusts the porting of supply oil to the control-oil output or back to the system drain, thereby regulating the oil pressure that positions the turbine’s control valves.

Its robust construction and design features make it particularly suitable for challenging environments where the hydraulic oil might not be perfectly clean. The failsafe mechanism is a crucial safety feature, ensuring that in the event of an electrical power failure or an internal unit failure (like a pressure sensor or processor failure), the valve returns to a safe, pre-defined position, often closing the turbine control valves to prevent runaway.

الوصف

Product Type: Electro-Hydraulic Pressure-Regulating Valve Control / Actuator
Manufacturer: Woodward
Actuator Series: V45TD
Operation: Double Acting (meaning it can be hydraulically driven in both directions for precise opening and closing)
Control Type: Electrohydraulic pressure-regulating valve control, often referred to as a CPC (Constant Pressure Control) or similar, that precisely controls oil pressure.
Input: Typically accepts a 4–20 mA pressure demand signal from a separate controller (e.g., a digital governor).
Output: Controls oil pressure to accurately position single-acting steam turbine governor-valves or similar control devices.
Key Features: Utilizes a very accurate internal pressure sensor and PID controller. Robust design, often resistant to oil contamination. Self-cleaning port design. Internal valve-return-spring for failsafe operation (forces valve to a safe position upon internal failure or power loss).

The Woodward 9907-1472 is a specific part number for a V45TD series electro-hydraulic actuator. This type of actuator plays a critical role in control systems by converting electrical command signals from a governor or controller into precise mechanical movement. This movement is then used to accurately regulate elements like fuel valves, steam admission valves, or other control linkages in turbines and large engines.