WOODWARD 9907-1337

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The WOODWARD 9907-1337 is an actuator, specifically a V45TD-2020-MUR2 Double Acting Actuator. This information is consistently listed in Woodward’s industrial product catalog.

WOODWARD 9907-1337: V45TD Double Acting Actuator

The WOODWARD 9907-1337 is a crucial component in industrial control systems. Its primary function is to convert a control signal—typically hydraulic or pneumatic pressure from a governor or another control module—into precise linear mechanical motion. This motion is then utilized to operate various industrial devices, such as a steam turbine’s inlet valve, a fuel valve, or a damper.

Product Overview

This particular part number designates a specific configuration within the V45TD series of actuators. These actuators are widely recognized for their robust design and exceptional reliability in demanding industrial environments.

• Product Type: Actuator
• Manufacturer: Woodward
• Part Number: 9907-1337
• Model Designation: V45TD-2020-MUR2 (often found with additional X’s in the suffix, like V45TD-2020-MUR2-X-S-X, which denote standard or unspecified options)
• Function: Converts hydraulic or pneumatic pressure into precise linear mechanical motion for controlling industrial equipment.
• Action Type: Double Acting. This means that pressure is applied to both sides of the internal piston to move the actuator in both extending and retracting directions. This provides more positive and controlled movement compared to single-acting actuators that rely on a spring for return.
• Fail-Safe Direction: Based on common configurations for “MUR” suffix in V45TD actuators, this model is likely Fail-Retract, meaning that upon loss of power or signal, the actuator is designed to retract to a safe position.

Detailed Product Description

The WOODWARD V45TD series of actuators are engineered for durability and precise control in heavy-duty applications. While a comprehensive, publicly available datasheet specifically for the 9907-1337 might not be immediately available, its model designation provides key insights into its characteristics:

• Hydraulic or Pneumatic Operation: V45TD actuators are designed to operate using either hydraulic fluid (often turbine lube oil, especially in steam turbine applications) or pneumatic pressure. This pressure is supplied by an associated governor (like a TG series governor) or a dedicated electronic control system, which generates the precise control signal the actuator responds to.
• Double-Acting Mechanism: The “Double Acting” characteristic is fundamental to its operation. By actively applying pressure to both sides of the piston, the actuator achieves precise and controlled movement in both directions (e.g., opening and closing a valve). This design offers superior control over spring-return actuators, especially when strong, positive force is needed for both extension and retraction.
• Linear Mechanical Output: The actuator produces a linear force and stroke. This linear motion is then mechanically linked to the component it is controlling, such as a steam turbine’s admission valve, a fuel valve on an engine, or a large industrial damper.
• Rugged Industrial Construction: These actuators are built to withstand the harsh realities of industrial settings. Their robust construction enables them to operate reliably under conditions of high temperatures, significant vibrations, and continuous duty cycles. Features like chrome-plated piston rods, internal and protected feedback sensors, stepped cushions, and triple shaft seal technology contribute to their longevity and ability to withstand side loads of up to 5% of the output force.
• Specific Configuration (2020-MUR2): The alphanumeric suffix provides specific details about this particular actuator:
  • The “2020” likely indicates a specific stroke length, referring to the maximum linear travel of the actuator (e.g., 202.0 mm, or an 8-inch diameter with an 8-inch stroke, which is a common configuration for this model type).
  • The “MUR2” part of the designation typically refers to specific configuration options, which can include the rod end type (e.g., male), internal valving, feedback mechanisms (e.g., internal position feedback), and specific mounting. Woodward uses these codes to define unique variations within a product line.

Technical Specifications (General for V45TD Actuators, Specifics for 9907-1337)

Typical Applications

The WOODWARD 9907-1337 V45TD Double Acting Actuator is commonly found in heavy industrial applications that demand precise, powerful, and reliable control over mechanical devices, including:

• Steam Turbines: Used for the accurate positioning of steam admission valves, which directly controls the flow of steam to the turbine and, consequently, its speed and power output.
• Gas Turbines: May be employed for the precise actuation of fuel gas or liquid fuel valves.
• Compressors and Pumps: In systems where precise flow or pressure regulation is achieved by adjusting large, heavy-duty valves or dampers.
• General Industrial Process Control: Any industrial process requiring robust, powerful, and highly accurate positioning of valves, louvers, or other control elements.