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9907-1374

VariStroke I

Actuator (V45TD-1510-FUE)

The new industry standard electro-hydraulic linear actuator used in the most demanding environments providing superb accuracy and resolution for stable, reliable and safe operation of steam turbine control valves or valve racks. Used on mechanical-drive or generator-drive steam turbines, the robust design with 50 lbf chip shear force, and self-cleaning port design uses a low-pressure hydraulic oil source (typically turbine lube oil) for output shaft force. The V45TD-1510-FUE is an integrated double acting universal mount 150mm bore/100mm linear stroke fail-extend female-thread shaft actuator for steam and hydro turbines.
Product Type

About 9907-1374

Turbine Actuator

  • Application Notes
  • Brochure
  • Product Specification
  • Software Manual
  • Technical Manual
  • Software
FEATURES & FUNCTIONALITY
Varistroke I solves steam turbine users #1 reliability problem...dirty oil!
 
The patented dirt tolerant and self-cleaning technology of Woodward's VariStroke actuators ensure greater overall reliability of your steam turbine. The VariStroke line of linear electro-hydraulic valve actuators operate mechanical-drive or generator-drive steam turbines. These linear actuators utilize a low-pressure, hydraulic oil source (typically turbine lube oil) to provide output shaft force. Their superb accuracy and resolution make them ideal for steam valve control and related turbine speed and load control, where turbine up-time and availability is essential.
 
The VariStroke line is configurable via a simple user-friendly, computer-based PC service tool, allowing users to easily configure, calibrate, and adjust all internal functions and response settings. Its integrated driver includes a 4-20 mA output channel to indicate output shaft (control valve) position, as well as unit alarm and shutdown relay outputs for use as unit health and status indications. The 4-20 mA demand inputs and dual-redundant shaft position sensors allow it to continue to operate even with demand input or feedback sensor failures, ensuring extended run-times between forced outages and on-line system repair.
 
The total installed cost for this fully-integrated actuator is low because it is completely assembled and tested at the factory, greatly reducing OEM and end-user fabrication, testing, and site assembly time. In retrofit applications, the VariStroke actuator can be used to directly replace the existing servo system. This saves costly repairs to existing and aging servos, eliminates the difficulty of obtaining spare parts for obsolete equipment, and reduces calibration time and difficulty.
 
Dirt-tolerant design:
Two moving parts
50 lb chip shear force
Self-cleaning valve design
 
Variable / configurable shaft stroke lengths
 
Fast slew rates/times:
Application dependent
Slew rate up to 762 mm/s (30 inches/second) @ 500 psi supply pressure no load
 
Precise position control
 
Side-load tolerant:
Shaft bearings
Triple seal technology
 
Integrated driver:
4–20 mA
Included valve flow linearization table
 
Redundant MLDT position sensors
 
Certified for Hazardous Locations 

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Download

Brochure
Name
Item Number
Language
VARISTROKE LINEAR ELECTRO-HYDRAULIC VALVE ACTUATOR BROCHURE
51471
English
Product Specification
Name
Item Number
Language
VARISTROKE-I ELECTRO-HYDRAULIC ACTUATOR
03397
English
Technical Manual
Name
Item Number
Language
VARISTROKE-I (VS-I) ELECTRO-HYDRAULIC ACTUATOR
26727
English

Software

Name
Item Number
Revision
Varistroke Tools
9927-2177
F
X
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