Woodward Heavy Duty Gas Turbine Electric Fuel Valves and Actuators

Common Problems with Hydraulic Actuators in Heavy Duty Gas Turbines

›Hydraulic fluid viscosity dependent on ambient

temperatures - leads to slower response times in

cold temperatures - resulting in failed starts

›Fluid varnishing can lead to clogged servovalve

passages resulting in failed starts or stops

›Potential of high pressure hydraulic leaks pose safety risks

›Premature seal failure - noise on hydraulic control

circuits can lead to premature wear on hydraulic

and gas seals

›No actuator/valve data to predict failure in advance of outages

Next Generation Electric

Valves and Actuators

Increase Turbine

Reliability and Availability

Heavy Duty Gas Turbines have increasingly been dispatched to support

the grid during renewable energy transition. These market conditions

drive fleet owners to operate their assets as peakers, creating the need

for frequent starts. Start-up reliability has become a key success factor

for these units.

Benefits of Electric

›Elimination of hydraulic fluid and associated problems

with contamination, cold weather and leakage

›Higher reliability design inherent to electric actuation

significantly increase maintenance intervals

› Improved control response and precision

›OEM Qualified and included with the majority of new

Gas Turbines

›Compliant with NERC standards for cold weather

preparedness

›Service Tool provides enhanced diagnostics for plant

personnel and early indication of performance issues

at the DCS operator terminal

Easy to Install

›Most valves are drop in replacements and do not

require piping modifications

›Servovalve Interface option allows the installer to

use existing signal wiring from the control system

›Alternate communication options for control system

integration are available such as CAN Bus and Analog

I/O for maximum flexibility

›Electric actuators are paired with a remote Digital

Valve Positioner (DVP) that controls the actuator

operation and serves as the customer interface for

power/signal wiring and digital communications.

Multiple DVP’s can be packaged within a stainless

steel cabinet and prewired from the factory to greatly

reduce commissioning time