WOODWARD UG25+ Actuators

WOODWARD UG25+ Actuators

Product Overview and Features

Core function: Receive control signals from UG25+speed controller, adjust the opening of steam valve through mechanical or electro-hydraulic drive, and achieve precise control of steam turbine speed.

Working principle: Convert electrical or hydraulic signals into mechanical displacement, drive valve action, respond quickly, and adapt to industrial real-time control requirements.

Model and specifications

Basic model classification

Divided by torque and configuration:

31 LB FT Torque Series:

UG25+Actuator (P3, 31 LB FT): Suitable for medium to high load scenarios, part numbers such as 8528-027 (key drive, CW rotation, with oil level gauge on the right, manual), 8528-028 (serrated drive, CCW rotation, with oil level gauge on the right, manual).

25 LB FT Torque Series:

Adapt to the basic torque requirements of UG25+governor, part numbers such as 8528-303 (25 LB FT, key drive, 0.875 "pump, 0.625" terminal shaft, CW rotation, with oil level gauge on the right), 8528-305 (25 LB FT, key drive, 0.875 "pump, 0.625" terminal shaft, CW rotation, with oil level gauge on the left).

Core parameters:

Drive mode: Keyed Drive or Serrated Drive, compatible with different turbine shaft interfaces.

Rotation direction: clockwise (CW) or counterclockwise (CCW), to match the direction of the turbine shaft.

Structure and working characteristics

Mechanical Drive Design:

Adopting a hydraulic cylinder or mechanical lever structure, the driving force is provided by hydraulic oil or spring force to ensure the stability of valve adjustment.

compatibility:

Seamless integration with UG25+Governors forms a "governor actuator" closed-loop system, which is also compatible with other brands of speed control units.

Environmental adaptability:

Some models support harsh industrial environments, are resistant to vibration and high temperatures, and are suitable for scenarios such as power generation and chemical engineering.

Application scenarios

Steam turbine control:

The main steam valve is regulated in the power station to maintain the stability of turbine speed and ensure the constant power grid frequency.

Process industry:

When driving compressors and pumps in chemical plants, adjust steam input according to load changes to ensure process continuity.

Power drive system:

Drive fans, rolling mills and other equipment to adapt to the speed requirements under different working conditions.

Accessories and Maintenance

Governor matching:

It must be used in conjunction with UG25+Governors (such as 8528-122 to 8528-137) to ensure compatibility of control signals.

Spare parts and maintenance:

Spare parts such as sealing kits, drive shafts, springs, etc. (refer to Woodward product catalog), support regular maintenance and replacement, and reduce downtime risks.

monitoring system:

Can be connected to MicroNet or Flex500 platforms to remotely monitor actuator position and hydraulic status through GAP software.

Advantages and Characteristics

Reliability: Mature mechanical structure, redundant hydraulic system design, suitable for long-term continuous operation.

Adjustment accuracy: Fast response speed, precise displacement control, ensuring that the steam valve opening matches the governor signal.

Easy installation: Multiple installation methods are suitable for different turbine equipment, and on-site debugging is simple without the need for complex programming.