VARIFLAME™

Low-NOx, High-Efficiency Burner for Package Boilers

The Industry Leader in Proven NOx Reduction.
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Reduces NOx, CO, VOC and particulate emissions
Predictable and reliable combustion performance
High turndown for maximum operating flexibility
Stable flame with a wide range of excess air operation
Simultaneous gas and oil firing capability
For gas- or oil-fired boilers with heat inputs from 30 to 400
MMBtu/hr burner
Advanced air-fuel staging and FGR for cost-efficient low-NOx
performance
Advanced oil tip design with lowest atomizing steam usage of
any burner
Quick ramp rate provides a rapid response to load swings

Rugged. Reliable. Remarkable.
The VARIFLAME burner delivers high-efficiency performance in gas-fired package boilers with NOx emissions as low
as 20 ppm at 3 percent O2. With thousands of installations to its credit, the VARIFLAME burner uses advanced air-fuel
staging techniques and can operate with or without FGR – setting a whole new standard for innovation that’s as simple as it is smart .

Clean Combustion Made Simple.
With no moving parts to adjust, the VARIFLAME burner is simplified in design but rugged in performance, even in the
toughest applications.
■ Venturi Register: turbulence-free axial airflow, venturi
shape minimizes pressure loss through the burner and
maximizes velocity.
■ Swirler: produces stable flames and enables thorough
mixing
■ Throat: precisely matched with the register and swirler
design to provide an aerodynamically stabilized flame
■ Gas burner: unique injector orientation provides fuel
staging within the flame envelope, reducing thermal NOx
formation
■ Oil burner: advanced sprayer plate designs achieve a precisely controlled flame geometry