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Woodward 8904-945
Product Name: 1907 Small Gas Valve (Valve Only)
Product Introduction: This valve is a Woodward 1907 series small gas metering valve, part number 8904-945, supplied as valve only. The valve is designed for the fuel metering needs of small and medium gas turbines and industrial gas engines, providing reliable gas flow control in industrial power generation, mechanical drive and combined heat and power applications, compatible with the full range of Woodward digital controls and actuator products.
Detailed content
Technical Specifications:
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Part Number: 8904-945
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Manufacturer: Woodward
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Series: 1907 Series
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Device Type: Small Gas Valve / Gas Metering Valve
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Configuration: Valve Only
Functional Features:
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Precise gas flow metering supporting stable turbine operation across full operating range
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Precision-machined metering port with stable and repeatable flow characteristic curve
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Compact structural design adapting to various space constraints
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Standardized mechanical and electrical interfaces for easy system integration
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Reliable and durable sealing system adapted to long-term continuous operation
Application Scenarios:
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Small and medium gas turbine power generation units
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Industrial combined heat and power systems
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Gas engine unit fuel control
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Distributed energy and microgrid projects
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Precise gas metering in industrial processes
Performance Parameters:
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Working Medium: Natural gas, clean industrial gas fuel
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Gas Filtration Accuracy Requirement: 25 micron absolute
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Working Pressure Range: Meets industrial gas system standard grades
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Flow Regulation Capacity: Covers full operating range of small turbines
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Ambient Adaptability: Standard industrial ambient temperature range
Material Composition:
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Valve Body: High-strength aluminum alloy or stainless steel precision casting
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Spool and Metering Components: Hardened wear-resistant alloy steel
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Seals: Fluorocarbon rubber (FKM) composite material, gas-corrosion resistant
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Fasteners: High-strength alloy steel with anti-corrosion surface treatment
Structural Features:
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Precision metering port achieving accurate flow-opening relationship
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Standard pipe connection interfaces for easy construction and installation
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Actuator mounting face precision machined to ensure assembly accuracy
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Optimized internal flow passage design with low flow resistance
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Overall structure validated for anti-vibration, adapting to dynamic environments
Working Principle: Gas enters the valve body through the inlet, flows through the metering port and then enters the downstream combustion equipment. The actuator drives the spool to move according to control system commands, changing the effective flow area of the port, thereby precisely regulating the gas supply. The control system calculates the required fuel quantity in real time based on turbine operating state parameters, maintaining speed, load or temperature within the target range by adjusting valve opening. The valve flow characteristic is guaranteed by the precision port geometry.
Installation Requirements:
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Install strictly according to flow direction and orientation marked on valve body
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Configure gas filters of specified accuracy upstream and downstream of valve body
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Select installation location considering actuator assembly and maintenance space
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Provide independent support for piping to prevent mechanical stress acting on valve body
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Complete system purge, leak detection and stroke verification before commissioning
Usage Precautions:
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Ensure gas filtration system remains continuously effective; replace filter elements regularly
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Strictly follow gas system safety and explosion-proof operating procedures
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Regularly inspect valve sealing and connection point conditions
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Avoid over-pressure, over-temperature and abnormal pulsation conditions
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Seal inlet and outlet when in long-term storage; keep in dry and ventilated environment
