Quartet Thermal Engineering Pvt. Ltd. Offers Bogie Hearth Furnaces. Quartet Thermal Engineering Pvt. Ltd. Manufactures different types of Heat Treatment Plants and Furnaces. The Bogie Hearth Furnaces are designed for various heat treatment processes of large / big components. The general arrangement is rectangular horizontal chamber constructed out of refractory with high service temperature, with vertical lifting counter balanced insulated door. The bogie can be loaded manually / completely mechanized.