Woodward GS10 Gas Metering System

Woodward GS10 Gas Metering System

Application scenarios

The Woodward GS series gas metering system is designed specifically for industrial gas turbines with output power ranging from 200kW to 30MW. It provides a reliable and cost-effective interface between electronic engine control systems and gas turbines in applications such as power generation, compressors, and mechanical drives. The GS10 valve is compatible with various gas fuels, such as natural gas, acidic gases, liquefied petroleum gas, methane, propane, butane, and hydrogen.

Product description

Structure and Design: GS10 adopts a rotary plate valve, integrates electric actuators and non-contact position sensors to achieve precise flow control. The use of rare earth permanent magnets in its efficient electromagnetic circuit reduces the packaging size. The integrated brushless DC actuator and valve design eliminates the backlash problem of gear motors and avoids the resolution and periodic oscillation issues of stepper motors.

Core Features

Self cleaning rotary plate valve with anti pollution properties.

Fully electric drive.

Only a single moving component.

Resistant to vibration and has a wide operating temperature range.

Quick response and high precision in flow control.

No on-site adjustment or assembly is required.

Standard 4-20mA interface with discrete fault output and shutdown function.

Some models have been certified for hazardous locations in North America.

Flow control and calibration: Gas flow control is usually achieved by accurately setting the port area of the metering valve based on assumed values of gas characteristics, pressure, and temperature. The GS10 valve is calibrated in the factory under actual flow conditions to provide accurate valve measurement area based on input signal requirements. The actual fuel flow rate depends on the valve area, gas pressure, gas temperature, and the gas itself. The fuel flow equation for the GS10 valve is located in the GS manual and available software programs, and can be used to set the GS10 valve under any specific site conditions.

Valve size: The GS10 valve is suitable for gas turbines with output power ranging from 2-15MW (depending on the characteristics and conditions of the available fuel gas). The rotary plate valve and actuator are located within a single low-carbon steel casing, with a 2-inch raised face flange gas connection and standard flange spacing. The measuring port size of GS10 valve is available in two types: 0.5 square inches (323 square millimeters) and 1.0 square inches (645 square millimeters).

Technical Parameter

GS driver parameters

Power supply voltage: 18-32Vdc.

Maximum transient power supply current: 25.0A, lasting for 0.20 seconds.

Normal steady-state input current:<4.0A.

Electrical connection: through the wiring terminals on the driver components and external grounding poles; The maximum distance between the valve and the actuator is 100m.

Valve position command signal: 4-20mA current signal, input impedance 249 Ω.

Valve indication position signal: 4-20mA current signal, input impedance<500 Ω.

Shutdown/reset command: Close the contact to operate, open to close the valve.

System fault indication signal: 1 set of C-type dry contact output.

Environmental temperature capability: -5 to+131 ° F (-20 to+55 ° C).

GS drive size: 9.0 x 10.0 x 3.0 inches (229 x 254 x 76mm).

Fault detection capability: open or short circuits in valve components or wiring connections; The input signal exceeds 20mA; the position loop error exceeds 5% of the full range and lasts for more than 0.250 seconds.

Dangerous place certification: see next page.

GS10 valve parameters

Gas flow range: 25-15000lb/h (11-6804kg/h).

Gas supply pressure range: 100-750PSI (690-5170kPa).

Minimum pressure difference: To ensure accurate flow characteristics, it is recommended to have a minimum of 20 psid (138 kPa).

Gas filtration requirements: 25 μ m or higher precision.

Available metering ports (maximum area): 0.5 square inches, 1.0 square inches (323 square millimeters, 645 square millimeters).

Gas inlet and ambient temperature: -20 to+248 ° F (-29 to+120 ° C) (note: dry gas is required when the temperature is below 0 ° C (32 ° F)).

Accuracy (percentage of port area): ± 5.0% of actual value or ± 0.5% of maximum value (whichever is greater).

Leakage of metering valve: Under specified conditions, the leakage amount when the gas is closed is less than 1.0% of the rated maximum flow rate.

Leakage of flow stop valve: Not applicable.

Flow stop valve response: Not applicable.

Full travel conversion time (closed-loop position control):<150ms.

Shutdown conversion time (when the driver voltage is 24Vdc):<75ms.

Position loop bandwidth: 35 radians per second (typical value) (note: the system dynamics are roughly second-order. The bandwidth is determined by the amplitude response at -6dB, and the GS driver voltage is 24Vdc).

Gas connection: 2.00 inch RF flange, compliant with ANSI B16.5 Class 600; Face to face dimensions comply with ANSI S75.03.

External gas emission connection: straight threaded port in accordance with SAE J514-4.

Electrical connection: Zone 2- actuator motor, one 0.500 inch NPT conduit connection, 3 wires, minimum 72 inches (1.8m) long; Zone 1- Wiring chamber with terminal blocks and two 0.5-inch NPT conduit connections.