WOODWARD GS40 Gas Fuel Valve Actuator with On-board Driver

WOODWARD GS40 Gas Fuel Valve Actuator with On-board Driver

1. Design and Construction

1.1 Valve Body

The GS40 features a 1.5” inlet/discharge stainless - steel valve body with ANSI 600# flanges. This construction ensures high - pressure resistance and durability, making it suitable for a wide range of industrial applications. The stainless - steel material also provides excellent corrosion resistance, even when dealing with harsh gas compositions. The self - cleaning, shear - type metering action is a standout feature. It effectively keeps the metering port free from deposits of gas condensates, contaminants, and system debris. This is crucial as such deposits can limit the performance of the valve over time. Whether the gas source is clean pipeline gas or wellhead gas with more impurities, the GS40 can maintain its optimal performance.

1.2 Actuator

Integrated electric direct drive (gearless) technology is employed in the actuator. This design offers several advantages over traditional geared actuators. Firstly, it reduces mechanical wear and tear, leading to an extended mean time between overhauls (MTBO). This is highly beneficial for plant operators as it aligns with longer production cycles and major overhaul periods. The actuator also has a spring - return fail - safe mechanism. In the event of a power failure or system malfunction, the spring - return feature ensures that the valve moves to a safe position, preventing any potential hazards associated with uncontrolled gas flow.

1.3 Driver

The on - board driver of the GS40 comes with embedded service tools, which simplifies maintenance and troubleshooting. It also has a conduit - connect feature, allowing for easy connection to the overall control system. This integration of the driver on - board the actuator reduces the need for external, complex wiring setups, enhancing the system's reliability and ease of installation.

2. Technical Specifications

2.1 Fuel Temperature Range

The GS40 is designed to operate in a wide fuel temperature range, from - 40 °F to 350 °F (- 40 to + 177 °C). This broad temperature tolerance makes it suitable for various operating environments, whether in cold regions or in applications where the gas fuel is subject to high - temperature processes before reaching the turbine.

2.2 Fuel Pressure Rating

With a rated gas supply pressure of up to 1440 psig (9928 kPa), the GS40 can handle high - pressure gas fuels. As OEMs and operators continue to explore ways to push the limits of fuel quality and energy content in combustion, higher fuel pressures are often required. The GS40's ability to withstand such high pressures makes it a reliable choice for modern gas turbine applications. It enables reliable light - off, emissions control, and turbine efficiency even under challenging fuel pressure conditions.

3. Applications

The GS40 is primarily used in API 616 aeroderivative and small heavy - duty gas turbine control. It finds applications in driving generators, compressors, turbo - expanders, fans, and pumps. In power generation plants, for example, it accurately meters the gas fuel to the combustion system of the gas turbine during different operating phases such as acceleration, steady - state operation, and deceleration. This precise fuel metering is essential for maintaining stable power output and ensuring the efficient operation of the turbine, ultimately contributing to reliable electricity generation. In gas compression applications, the GS40 helps in controlling the gas flow to the compressor, optimizing the compression process and enhancing the overall efficiency of the gas transportation system.

SOGAV Gas Valves | Woodward

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