The series 850 cast iron burner is widely employed in flame surface treating applications, offering versatility through various ribbon patterns to treat any web. In cases where speeds exceed 1500 feet per minute, the use of two burners may be necessary. These burners are exclusively available in single slot ribbon design assemblies, tailored to specific application needs. To ensure optimal performance and minimize burner deflection across widths exceeding 6 meters, four channels of external water cooling are incorporated into the design.