Woodward 9907-1748

الوصف

The Woodward 9907-1748 is a specific part number for a V45TD series electro-hydraulic actuator. This crucial component in industrial control systems, particularly for turbines, converts electrical signals from a governor or control system into precise mechanical movement to regulate critical parameters like fuel flow or valve position.

WOODWARD 9907-1748: V45TD Series Electro-Hydraulic Actuator (1.2-inch Stroke, with Mechanical Manual Shutdown)

The Woodward 9907-1748 corresponds to the V45TD-1207-MURXM-X-S-X configuration of a V45TD series electro-hydraulic actuator. It’s built for demanding applications that require accurate and responsive control of valves or other linkages in hazardous environments, and importantly, includes a mechanical manual shutdown feature.

Product Overview

• Product Type: Electro-Hydraulic Actuator
• Manufacturer: Woodward
• Actuator Series: V45TD
• Specific Model: V45TD-1207-MURXM-X-S-X
• Operation: Double Acting (meaning it uses hydraulic pressure to drive movement in both extend and retract directions, offering precise control).
• Stroke/Travel: The “1207” in the model number typically indicates a 1.2-inch (30.5 mm) stroke.
• Environmental Rating: The “MURXM” suffix often denotes specific mounting, electrical connections, and importantly, ATEX compliance for use in hazardous (potentially explosive) environments. The ‘M’ indicates a mechanical manual shutdown capability, and ‘R’ often indicates resistance to oil contamination.
• Input Signal: Typically accepts an analog command signal (e.g., 4-20 mA or 0-5 Vdc) from an electronic controller.

Detailed Description

Woodward V45TD series actuators are highly regarded for their robust design, high precision, and fast response, making them indispensable in demanding industrial applications. The 9907-1748 acts as the direct interface between a digital control system (like a Woodward MicroNet or 505 controller) and the mechanical elements it needs to manipulate, such as fuel valves, steam admission valves, or inlet guide vanes in a turbine.

Key characteristics of this V45TD actuator configuration include:

• Precise Electro-Hydraulic Control: It translates an electrical demand signal from a governor into proportional hydraulic pressure, which then drives the actuator’s piston to a precise position. This ensures accurate regulation of the controlled device.
• Double-Acting Operation: Unlike single-acting actuators that rely solely on a spring for return, the double-acting design allows for active hydraulic control in both directions, providing greater control stiffness and responsiveness.
• Robust Construction: Built to withstand the harsh conditions often found in power generation and industrial processing environments, ensuring long-term reliability and minimal maintenance. Features like chrome-plated piston rods, internal and protected feedback sensors, and triple shaft seal technology contribute to its durability.
• Hazardous Area Compatibility: ATEX compliance (implied by the “MURXM” designation) means it meets European Union safety directives for equipment intended for use in potentially explosive atmospheres, such as those found in oil & gas facilities or chemical plants.
• Mechanical Manual Shutdown Feature: The ‘M’ in the suffix (MURXM) indicates the inclusion of a mechanical manual shutdown. This provides an additional layer of safety, allowing operators to physically and directly override the control system and shut down the controlled device if necessary.
• Quick Response: The design enables rapid and accurate movement of the controlled device, crucial for maintaining stable speed, load, or process parameters under dynamic operating conditions.

Applications

The Woodward 9907-1748 (V45TD-1207-MURXM-X-S-X Actuator) is typically used in critical control loops for:

• Steam Turbines: Accurately positioning steam admission valves, extraction valves, or other steam flow control elements for speed and load regulation in power plants. Its high accuracy and resolution are ideal for steam valve control.
• Industrial Gas Turbines: Precisely controlling fuel gas or liquid fuel valves, compressor inlet guide vanes, or exhaust guide vanes to manage turbine speed, power output, and emissions.
• Industrial Compressors and Pumps: Regulating the flow or speed in systems driven by turbines or large engines, where precise control is paramount.
• Power Generation: Essential for the accurate and responsive control of turbine-generator sets to ensure stable and efficient electricity production, especially where a mechanical shutdown option is desired for added safety.
• 

Related Products/Series

The Woodward 9907-series encompasses various control system components, including a wide range of actuator configurations. Other part numbers within the V45TD actuator family with similar characteristics (varying by stroke, work output, or specific options) include:

• 9907-1756: V45TD-1207-FUEXM-X-S-X (same 1.2-inch stroke and ATEX, but typically without the mechanical manual shutdown).
• 9907-2142: Also a V45TD-1207-FUEXM-X-S-X (same 1.2-inch stroke and ATEX, but without the mechanical manual shutdown).
• 9907-1752: V45TD-1210-FUEXM-X-S-X (similar features, but with a 1.0-inch stroke).
• 9907-1728: V45TD-1015-MURXM-X-S-X (similar features, but with a 1.5-inch stroke).

For precise application and compatibility, always refer to the specific product’s label and Woodward’s official documentation.