WOODWARD 9907-1225

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The WOODWARD 9907-1225 is a specific configuration of a TM-200LP Linear Actuator.

WOODWARD 9907-1225: TM-200LP Linear Actuator

The WOODWARD 9907-1225 is a powerful and precise actuator designed for heavy-duty industrial applications. It translates control signals into linear mechanical motion, primarily to regulate the speed, power output, or other critical parameters of large engines and turbines.

Product Overview

This part number belongs to Woodward’s robust TM (Turbine/Engine Master) series of actuators, specifically the TM-200LP variant. The TM-200LP is a high-work-capacity model within this family, capable of handling applications requiring more force than smaller TM series actuators.

• Product Type: Linear Actuator
• Manufacturer: Woodward
• Part Number: 9907-1225
• Model Designation: TM-200LP
• Key Features:
  • LP (Low Pressure): This indicates that the actuator is designed to operate with a lower hydraulic or pneumatic supply pressure compared to high-pressure versions. This is beneficial in systems where high-pressure hydraulic fluid is not readily available or where lower operating pressures are preferred.
  • “Extend”: This is a crucial detail, indicating the actuator’s shaft extends when activated or as its fail-safe/commanded direction.
  • No Integrated Feedback (Inferred): The catalog listing specifically for 9907-1225 states “TM-200LP, Single Coil, Extend”. When LVDT (Linear Variable Differential Transformer) or other feedback mechanisms are not explicitly mentioned in the description for a specific part number within the TM-LP series, it generally means there is no integrated position feedback. If closed-loop position control is required by the control system, an external position sensor would be necessary.
• Function: It converts a control signal (typically a hydraulic or pneumatic pressure signal, or an electrical signal to its internal solenoid) into precise linear force and displacement. This mechanical output then operates fuel racks, valve linkages, or other control surfaces on prime movers or industrial machinery.

Detailed Product Description

The Woodward TM-200LP Actuator is engineered for reliable and precise performance in demanding industrial environments. The TM series is well-regarded for its durability, adaptability, and high work output.

• Hydraulic or Pneumatic Operation: TM actuators can operate using either hydraulic fluid or pneumatic pressure as the working medium, depending on the specific system design. The “LP” designation highlights its suitability for lower supply pressures (e.g., typically 80 to 1200 psig / 552 to 8274 kPa supply oil, but TM-200LP is rated for up to 1200 psig).
• High Work Capacity: As a TM-200LP, it offers a significantly higher work output compared to the TM-25LP. It’s capable of 200 ft-lb (271 J) work capacity, suitable for controlling larger and heavier valves or linkages that require substantial force. It can provide up to 2400 lbs (10 675 N) of maximum output force.
• Precision and Repeatability: Despite its high force output, these actuators are designed to provide highly accurate and repeatable positioning. This precision is vital for maintaining stable speed, load, or other critical parameters for engines and turbines. Hysteresis is typically ±1% of travel.
• Robust Construction: Built to withstand harsh industrial conditions, including significant vibrations, wide temperature fluctuations (ambient range of –40 to +121 °C / –40 to +250 °F), and continuous duty cycles. Woodward actuators are known for their robust design and long service life.
• Linear Motion Output: The actuator provides a linear force and stroke of one inch (25 mm), meaning its output shaft moves in a straight line, directly connecting to and operating control linkages.
• Fast Response Time: The TM-200LP has a fast response time constant (25% to 75% step) of 0.045 seconds at 1000 psi (6895 kPa), ensuring quick and accurate adjustments.

Technical Specifications (General for TM-200LP Actuators, specific details for 9907-1225)

Typical Applications

The WOODWARD 9907-1225 TM-200LP Linear Actuator is commonly found in a variety of heavy-duty industrial applications that require reliable, powerful, and precise mechanical control:

• Large Diesel and Gas Engines: For accurate and powerful control of fuel injection systems, throttle bodies, or air dampers to maintain desired engine speed and load. The “LP” feature is useful where lower pressure hydraulic systems are available.
• Medium to Large Steam Turbines: For actuating significant steam admission valves, regulating steam flow to control turbine speed and power output.
• Industrial Compressors and Pumps: Used in systems where substantial flow or pressure regulation is achieved by adjusting large, heavy-duty valves or dampers.
• General Industrial Machinery: In processes where direct mechanical control from a governor or control system is needed, and where substantial force and precise linear motion are required.