Woodward 8407-515 TecJet 110 Fuel Control Valve Unit

Module Feature

8407-515 is Woodward TecJet 110 digital fuel metering valve, an all-in-one assembly combining proportional valve body, electric actuator and signal conditioning electronics. It performs real-time mass flow calculation with built-in pressure and temperature compensation to eliminate density variation error of natural gas. Fast dynamic response supports large load step changes for reciprocating gas engines and dual-fuel prime movers. Control resolution is high for precise air-fuel ratio management and emission compliance. It accepts 4-20mA analog setpoint or digital Modbus communication from engine controller. Internal sensors continuously monitor differential pressure, gas temperature and valve position feedback. SIL 2 safety integrity level certification allows deployment on power generation and compression equipment. Widely used for generator sets, gas compressors and industrial dual-fuel engines.

Working principle

The host engine controller sends flow setpoint to TecJet valve. Onboard DSP reads gas pressure, temperature and valve LVDT position signals, calculates required valve opening to achieve target mass flow. The actuator drives the trim element to adjust flow area dynamically. Measured flow and fault status are transmitted back to the main control system for closed-loop air-fuel control and safety interlock.

Onboard components

Gas valve body, proportional actuator, LVDT position sensor, pressure transducer, temperature sensor, main control PCB, communication interface circuit, cable gland assembly, metal flange housing.

LED indicators

Local status LEDs for power, command active, valve tracking and fault alarm.

Hardware self‑diagnosis

Self-check covers supply voltage out-of-range, position tracking error, sensor signal loss, over-temperature, valve travel limit and communication timeout. Fault codes and runtime history are stored in on-board memory.

Programming software

Woodward ToolView configuration software for flow curve calibration, communication setup and firmware upgrade.

Electrical & Process Parameters

Model:8407-515 Brand:Woodward Device type:Digital Mass Flow Fuel Metering Valve Size:DN100 Medium:Natural gas / methane-based gaseous fuel Power supply:24V DC Control signal:4-20mA analog, Modbus RTU Safety rating:SIL2 (IEC61508) Function:Precise gaseous fuel mass flow regulation for gas engine and gas turbine systems

Mechanical & Structure

Mounting:Flange connection Housing:Cast alloy / stainless steel wetted parts Protection class:IP65

Environmental

Operating temperature:-40℃ ~ +85℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing Certification:CE, SIL2 approved Status:Woodward original TecJet spare valve

Installation

Install valve on gas fuel piping with correct flow direction marking. Install upstream filter and shut-off isolation valves. Wire 24V DC power, command signal and communication cable. Perform flow calibration and stroke test via ToolView. Check gas tightness before engine commissioning. Keep inlet filter maintained to avoid particle damage to trim.

Interface

Gas inlet flange, gas outlet flange, multi-core signal cable connector.

Diagnostic

Flow deviation alarm: Dirty inlet filter, pressure sensor drift or gas composition change. Position tracking fault: Actuator jam, damaged LVDT or mechanical binding. Communication loss: Cable break, wrong baud rate or address conflict. Temperature fault: Internal sensor failure or excessive gas temperature.

Product Brief

Woodward 8407-515 TecJet 110 digital gas fuel metering valve, DN100, integrated pressure/temperature compensation, 24V DC, SIL2 rated, used for natural gas engine and gas turbine precise fuel mass flow control.