Box Furnaces with Optional Charge Table
Enlarge photoUpton box furnaces are available with electric or gas-fired heating, and the U-BCE model adds a charge table. Their heating-system design shields loads from direct radiant heat or flame impingement while promoting efficient, uniform heating.
Electric Heating Systems
Electric furnaces use resistance heaters selected for the application, intended atmosphere and customer preference. Open resistance-wire and bayonet/radiant-tube styles are available. These heaters help maintain atmosphere integrity and thermal efficiency. SCR power controllers with diagnostics displays mounted on the control-panel door are standard; PLC and PC system integration is optional. Heating systems are factory wired.
Gas Firing Systems
Gas-fired furnaces use direct-fired or radiant-tube burners designed to maintain furnace atmosphere integrity. Sealed burner systems are available with standard tube firing or single-end recuperative designs, based on customer preference. Solid-state flame supervision systems with diagnostics displays mounted on the control-panel door are standard; PLC and PC system integration is optional. Combustion systems are factory piped.
Thermal Recirculation Systems
Alloy cartridge fans recirculate the furnace atmosphere through a stainless-steel plenum above the chamber to promote even temperatures. Sidewall ducts deliver the atmosphere beneath the workload and return it through the fan plenum inlet. The recirculation system is integrated with the electric or gas heating system.
Triple Seal Door Designs
The door uses a triple seal: ceramic fiber against ceramic fiber, fiber against the furnace steel faceplate and a gasket around the perimeter. Pneumatically operated automatic clamping devices close the door. Together, the seals and clamps help limit heat loss and maintain atmosphere integrity. Door-opening systems move the door away from the faceplate to prevent abrasion of the refractory.