Ultra Low NOx burners incorporate two key technologies to lower burner peak flame temperature and NOx emissions. 

These Technologies Include:
• Combustion staging
• Flue gas recirculation

Callidus Ultra Low NOx Burners Feature:
• Maximum NOx formation reduction
• NOx lowering mechanism is completely integral to burner design
• Steam injection not needed
• Uniform heat flux transfer to process tubes
• Capability to burn a wide range of fuels
• High turndown capability
• Multiple firing orientations (vertical up or down, horizontal)
• Adaptable for short flame length requirements

Typical Ultra Low NOx Burner Applications:
• Where very low NOx emissions are required
• Where uniform heat flux distribution is critical
• Most new process heaters today, particularly for U.S. West Coast and U.S. Gulf Coast
• Heater retrofits for Best Available Control Technology (BACT) NOx reduction

Callidus Ultra Low NOx Burner Models:
• LE-CSG (Low Emission Callidus Staged Gas)
• LE-CRG (Low Emission Callidus Raw Gas)