Last Updated: January 21, 2022
Companies like SG Controls offer stainless-steel, water-cooled burners with nitrogen curtains to reduce the hot zone width, which prevents preform sagging during collapse. Adjustable flow nitrogen jets on the outside edges of the burner blow against the tube to uniformly reduce the hot zone width. This allows the operator to adjust the hot zone width during collapse. This piece of equipment can enhance uniformity and fiber yields.