Lucifer Furnaces, manufacturer of industrial heat treating furnaces and ovens, shipped a dual chamber Red Devil furnace to a customer in the Midwest. The Red Devil offered the end user a cost effective means to heat treat their small tool steel parts in-house in a timely manner. The Model RD8-KHE18 is a Space Saving dual chamber unit with working dimensions of 12”H x 14”W x 18”L in both upper and lower chambers. The upper hardening chamber is rated up to 2200°F while the lower convection oven tempers up to 1200°F. This unit was customized with a programmable controller with an overtemp safety system for the upper chamber as well as a 7-day timer with alarm for audible event notification. Both chambers are lined with a multilayered 4.5" combination of lightweight firebrick hotface insulation and mineral wool backup insulation for energy efficient operation. The firebrick is precision dry fit inside the chamber with staggered seams for reduced heat loss while allowing for thermal expansion. Heating elements are coiled with heavy gauge wire of low watt density mounted in easy-to-replace side wall panels. The lower chamber has a rear mounted fan for uniform circulation of heat. Ceramic Hearth plates in both chambers support the workload and protect floor brick and can be replaced without removing heating elements.
Submitted by Lucy Jones (215)-343-0411, Ljones@luciferfurnaces.com March 2021