If your steam turbine power system is still running on older Power Cylinder Steam Rack actuation technology, your equipment may have unrealized potential.

Older large stroke linear turbine lube oil hydraulic piston actuators require regular servicing and calibration which can lengthen system downtime.

Internal wear frequently leads to over or undershooting position, which can impact steady state and transient load response performance.

Some operating environments with high amounts of dust or dirt can lead to decreased performance and increased maintenance costs.

Woodward's VariStroke series actuators are built to provide convenient calibration, tuning safety, reliable operation and increased steam turbine performance.

Built to last, these electro-hydraulic linear piston actuators have features that provide the optimum performance, even under the most challenging operating conditions:

• Accurate positioning with fast slew rate up to 722mm/s

• Automatic adaptive PID tuning adjustment

• Lube oil actuation is tolerant to dirt and wear metals

• Designed for continuous side loading, preventing output shaft oil leakage

• Soft stop technology decreases impact wear while guaranteeing accurate positioning

• Certified for hazardous environment conditions

• Numerous actuator sizes and configurations built for any steam turbine application

• Redundant DX skid provides easier maintenance and greater system availability and safety

Peaker Services’ application engineers can spec out which VariStroke actuator is right for your system and design the mechanical machine interface assemblies. Our field team can install and commission during your scheduled outage leaving you with a smooth, operator friendly turbine.

We also provide other safety system upgrades including fault tolerant turbine trip block systems, overspeed protection and system controls.

With over 40 years of steam turbine system retrofit support under our belts, look to us as your steam turbine modernization partner.

Contact us with your outage information here.