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Key Product Variants Include

• Gear, Vane, Centrifugal, Regenerative, Ejector and multiple pump capabilities.

• Leaded bronze and lead-free bearings.

• Facilized for full narrowbody run rates.

Key Features

• Innovative single, dual and variable pump schemes provide the ultimate 

ability to fine tune system level performance-to-cost metrics.

• Proven, tested and scalable design tools for world-class, prime reliable

pumping elements including gears, vanes, liquid-rings, regen wheels,

impellers, inducers and ejectors.

• Significant cost, weight and program execution efficient when integrated with filters,

heat exchangers, sensors, PMAs and metering controls.

Woodward’s broad range of single and two-stage servovalve platform technology

leads the industry in performance capability at a low cost.

Features & Functionality

Woodward’s broad range of single and two-stage servovalve platform technology

leads the industry in performance capability at a low cost.  We combine millions

of successful flight hours in field proven elements with enhanced robustness

design features to provide the highest performance to cost ratio over the competition.

Our EHSVs are available in jet pipe and nozzle flapper configurations for the aerospace, industrial and

medical industries.

Key Product Variants Include

• Single and dual stage nozzle flappers, jet pipers and direct drive configurations with

flow rates ranging from 0.25 to 100 gallons-per-minute in standard production packages.

• Up to 5500 psi and beyond.

Key Features

• Proven design elements to meet extreme environments such as 100G continuous operation.

• Reliable, accurate, and cost effective flow and pressure control.

• Long history of successful, transparent competitive displacements offer OEMs and

Operators tremendous cost benefits throughout the remaining product lifecycle.

• Reuse of scalable design tools to reduce risk, cut costs and boost reliability.

Key Product Variants Include

• Single and dual stage nozzle flappers, jet pipers and direct drive configurations with

flow rates ranging from 0.25 to 100 gallons-per-minute in standard production packages.

• Up to 5500 psi and beyond.

Key Features

• Proven design elements to meet extreme environments such as 100G continuous operation.

• Reliable, accurate, and cost effective flow and pressure control.

• Long history of successful, transparent competitive displacements offer OEMs and

Operators tremendous cost benefits throughout the remaining product lifecycle.

• Reuse of scalable design tools to reduce risk, cut costs and boost reliability.

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

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

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

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.

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

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

Rugged and precise fuel control and shutoff valves for large, heavy-duty gas

turbines with single or multiple combustion manifold systems.

Available in electric or hydraulic models.

Features & Benefits

• Ultra-low pressure drop valve body design reduces gas compression operating costs

• Electric actuator options eliminate the need for high-pressure hydraulic fluid,

which improves safety and eliminates downtime caused by hydraulic fluid varnishing clogging servo

valves

• Onboard diagnostics to provide advance notification of potential operating problems

Product Variants

• LESV – Large Electric SonicFlo Valve

• Electric Rotary Pressure and Flow Control Valve

• Hydraulic Gas Control Valve

• Hydraulic Stop/Ratio Valve

The 3103 gas valve is a rotary sleeve-and-shoe type-throttling valve.

Valve position feedback to the actuator driver is accomplished using a high accuracy resolver.

The EM35MR actuator is designed for use with the DVP (Digital Valve Positioner).

Features and Benefits

• Design of the valve is to be corrosion resistant and self-cleaning, allowing it to

operate in sour gas environments (high sulfur content gas) that can cause problems for other valves

• The EM35MR actuator is all electric, reducing hydraulic contamination and maintenance problems

• The DVP uses the latest in Woodward control architecture, robust controller to provide high-speed

precise valve control

Product Variants

3103 EM35MR

• Conduit Entry

• 2.0 Inch RF ANSI Flange

• 24 VDC Input Voltage

• Standard Inlet Pressure and Enhanced Inlet Pressure Options

Product Specifications 3103 EM35MR

Maximum Gas Supply Pressure

• 720 psia (4964 kPa) – Standard Inlet Pressure (CSA and CE)

• 900 psia (6205 kPa) – Standard Inlet Pressure (CSA)

• 900 psia (6205 kPa) – Enhanced Inlet Pressure (CSA and CE)

Fuel Temperature

• -40 to +300 degrees Fahrenheit (-40 to +149 degrees Celsius)

Ambient Temperature

• -40 to +200 degrees Fahrenheit (-40 to +93 degrees Celsius)