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Manufactured by Zhengzhou Wister Gas Equipment Co., Ltd., the WST-QEF-2.8 is an integrated low-NOx gas burner specifically designed for 4-ton industrial boilers. It adopts premix surface combustion / staged combustion technology to achieve ultra-low NOx emissions while maintaining high energy efficiency and stable operation, compatible with natural gas, LPG and other gas fuels.
Applicable Equipment: 4-ton steam boilers, hot water boilers, thermal oil heaters, hot air furnaces
Fuel Compatibility: Natural gas, liquefied petroleum gas (LPG), town gas, biogas
Thermal Power: 2.8MW (approx. 2,400,000 kcal/h), matching standard heat load of 4-ton boilers
Control Mode: Modulating / two-stage control, supporting remote PLC communication and MODBUS protocol
Low-NOx Performance: NOₓ emission ≤30mg/m³, meeting ultra-low emission environmental standards
Key Structure (Integrated Design):
Blower, gas valve train and combustion head integrated in one unit, compact installation and easy commissioning
Equipped with metal fiber / porous media burner head, uniform short flame and stable heat load
Integrated DUNGS gas valve train, pressure switches, UV flame detection, flame failure protection and fault self-diagnosis
Key Features:
Ultra-low NOx emissions, compliant with the latest national and local environmental regulations
Integrated design eliminates the need for separate blower installation, greatly reducing on-site modification work
Full premix / staged combustion, thermal efficiency ≥99%, lower energy consumption
Fully automatic closed-loop control with multiple safety interlocks, stable and reliable operation

Industrial boilers
Commercial heating
Food/textile/chemical drying equipment
District heating systems