http://www.taiyi-machinery.com..../heat-treatment-furn Pit Type Furnace manufacturers Machine Description: Pit furnace is a periodic operation furnace, suitable for the heat treatment of rod and long shaft parts. The structure of the pit furnace is: the furnace body is a cylindrical deep well, and the workpiece is vertically loaded into the furnace by a special crane for heating. The fuels used are usually gas and oil. When electricity is used as a heat source, it is called a well-type resistance furnace. Pit furnaces are generally placed below the ground level of the workshop, and some are placed above the ground
