DURAG D-HG 400 High Energy Ignition Device
Overview
The DURAG D-HG 400 is a high energy ignition device used to ignite burners and pilot burners in industrial combustion plants. In the high energy ignition device, a high energy ignition spark is generated in the electrode gap by the abrupt discharge of energy stored in a capacitor. The device provides reliable ignition of gas, oil and liquid fuel burners in boilers, process heaters and similar fired equipment, with a design concept proven in service for more than 30 years.
The D-HG 400 is engineered as part of a complete combustion engineering system including flame monitoring and flue gas analysis equipment for fired equipment. Ignition systems of this type are key to burner start-up reliability in continuous process plants
Engineering and Design
The D-HG 400 uses a thyristor-controlled capacitor discharge circuit to produce the ignition spark, with a microcontroller monitoring the ignition process. The energy stored in the capacitor bank is released abruptly across the spark gap of the ignition electrode, producing a spark powerful enough to ignite the fuel-air mixture reliably. The microcontroller monitors the discharge and the state of the ignition unit, providing status feedback used by the burner management system.
As part of the DURAG combustion engineering range, the D-HG 400 operates with the associated high voltage transformer and ignition electrode assemblies, and is designed for integration with flame monitoring systems in the same family. The device is engineered for continuous industrial service in power plants, boilers and heater applications, and its extended service life reduces maintenance requirements compared to lower energy ignition systems.
The D-HG 400 is engineered as part of a complete combustion engineering system including flame monitoring and flue gas analysis equipment for fired equipment. The ignition unit operates with the associated high voltage transformer and ignition electrode, and its status output informs the burner management system so that start-up sequences are based on confirmed ignition energy supply. The ignition control is designed to work with the DURAG flame monitoring range, giving the plant a single supplier for the complete ignition and flame safety function of the burner management system. Ignition systems of this type are key to burner start-up reliability in continuous process plants. The high energy spark is generated directly at the electrode tip in the flame zone, avoiding the ignition reliability problems of low energy spark systems in demanding fuels and operating conditions. Once the flame is established, the ignition unit is switched off automatically by the burner management sequence, and the D-HG 400 remains ready for the next start cycle.
Key Features
- High energy ignition spark generation
- Thyristor-controlled capacitor discharge
- Microcontroller-monitored ignition
- Reliable ignition of gas, oil and liquid fuels
- Proven design over more than 30 years
- Designed for continuous industrial service
Applications
The D-HG 400 is used for ignition of main burners and pilot burners in industrial boilers, power plant burners, process heaters, duct burners and marine and stationary combustion applications firing gas, oil or liquid fuels.
Specifications
| Type | high energy ignition device |
| Ignition principle | abrupt capacitor discharge across spark gap |
| Control | thyristor-controlled discharge |
| Monitoring | microcontroller-based |
| Fuels | gas, oil and liquid fuels |
| Service | continuous industrial duty, boiler and heater applications |
Why Seven Star LLC
Seven Star LLC supplies the DURAG D-HG 400 high energy ignition devices and associated ignition electrodes for burner applications in Oman and the GCC.
Call To Action
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DURAG is a German engineering manufacturer specializing in combustion monitoring, flame detection and burner management systems for industrial and power generation environments. The brand designs optical flame scanners, burner control units, ignition systems and combustion analysis solutions used in boilers, furnaces, gas turbines and thermal process equipment. DURAG systems are widely applied in power plants, refineries, petrochemical facilities, cement plants and waste-to-energy installations where precise flame supervision and combustion safety are critical. Engineered for harsh operating conditions, DURAG solutions support stable combustion, operational safety and regulatory compliance in complex industrial processes.
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