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Woodward 8915-627
Product Name: 1907 Small Gas Valve (valve only) — Woodward part number 8915-627.
Product Introduction: According to the Woodward 1907 series product catalog, 8915-627 is a small gas metering valve supplied in “valve only” configuration, intended for fuel metering in small- and medium-sized industrial gas turbines and gas engines. It is compatible with Woodward digital controls and actuators. Available parts mapping indicates this model corresponds to the HLR-750-2000 series LVDT position sensor configuration.
Detailed content
Technical Specifications:
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Part Number: 8915-627
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Manufacturer: Woodward
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Series: 1907 Series
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Equipment Type: Small Gas Valve / Gas Metering Valve
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Configuration: Valve Only
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Matching Sensor Configuration: HLR-750-2000 series LVDT position sensor (0.750 in / 19 mm housing diameter, 2-inch stroke)
Sensor Reference (HLR-750 LVDT family): Based on the technical characteristics of the HLR-750 series LVDT used across the 1907 valve family:
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Sensor Type: AC Linear Variable Differential Transformer (AC LVDT)
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Housing Diameter: 0.750 in (19 mm)
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Non-contact measurement principle with no friction or wear
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Full stainless-steel sealed housing, protection class IP61 to IP68
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Epoxy-potted coil windings with excellent shock and vibration resistance
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Linearity error ≤ ±0.15% FSO (typical), ≤ ±0.25% FSO (maximum)
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Repeatability and hysteresis: 0.01% of full scale
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Operating temperature: -54°C to +135°C (standard), -54°C to +204°C (high-temperature version)
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Expected life: over 100 million operating cycles
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Shock rating: 1000 g, 11 ms
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Vibration rating: 20 g to 2 kHz
Functional Features:
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Precise gas flow metering for small- and medium-sized turbine fuel control
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1907 series compact structure adapted to space-constrained installations
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Standardized interface compatible with Woodward TM and EM actuators
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Precision metering port delivering repeatable flow characteristics
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LVDT-based non-contact position feedback with theoretically unlimited service life
Application Scenarios:
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Small- and medium-sized industrial gas turbine generator sets
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Combined heat and power (CHP) systems
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Gas engine fuel management
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Distributed energy stations
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Precise gas metering in industrial processes
Performance Parameters: Model-specific pressure, flow, and temperature ratings for 8915-627 are not separately published in the retrieved materials. As a member of the 1907 small gas valve family, it shares the following common parameters: working medium of natural gas or clean industrial gas, gas filtration requirement of 25 microns absolute, ambient temperature range of -20°C to +80°C, and flow capacity matched to small- and medium-sized turbine requirements.
Material Composition:
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Valve Body: High-strength aluminum alloy or precision-cast stainless steel (per 1907 series construction)
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Metering Components: Hardened wear-resistant alloy steel
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Seals: Fluororubber (FKM) composite, gas-resistant
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Fasteners: High-strength corrosion-treated alloy steel
Structural Features:
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Precision metering port with a deterministic flow-to-opening relationship
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Standard flange or threaded connection ports
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Precision-machined actuator mounting interface
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Optimized internal flow passages with low resistance
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Vibration-validated structure for power equipment environments
Working Principle: Gas enters through the inlet, passes through the precision metering port, and exits to the combustion system. An external actuator driven by the electronic controller adjusts the spool position to change the flow area, thereby regulating fuel supply to the turbine. The HLR-750 LVDT sensor provides non-contact, real-time valve position feedback to the control system via electromagnetic induction, enabling high-accuracy closed-loop control.
Installation Requirements:
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Confirm actuator and controller compatibility before installation
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Use standard pipe connections with clean sealing surfaces
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Precisely align the actuator mounting face to ensure coaxiality
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Correctly mount the corresponding HLR-750-2000 series LVDT position sensor, ensuring coaxial alignment with the moving component and using non-magnetic extension rods if required
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Electrical connection shall use shielded cable to reduce electromagnetic interference
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Provide upstream gas filtration at 25 microns absolute
Usage Precautions:
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Strictly maintain 25 micron absolute gas filtration to protect the metering port
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Operate within the rated pressure and ambient temperature range
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For the LVDT sensor: keep the working stroke within the rated travel range to avoid over-travel damage; ensure the bending radius of the lead wire is not too small; regularly check fastener tightness in high-vibration environments; avoid use near strong magnetic field sources
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Regularly inspect seals and position feedback signal stability
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Protect precision-machined surfaces during maintenance
