Grieve supplied a 2200°F (1204°C) inert-atmosphere pit furnace that will be used for heat treating automotive parts in baskets. Workspace dimensions of the furnace measure 36 inches wide x 36 inches deep x 48 inches high. Controls include a digital indicating temperature controller, manual reset excess temperature controller with separate contactors and an SCR power controller.
The furnace has 11-inch-thick insulated walls comprised of 4.5-inch-thick 2600°F firebrick, 2.5-inch-thick 2300°F firebrick and 4 inches of 1900°F block insulation. Other features include a 0.25-inch plate steel exterior reinforced with structural steel and an air-operated, rear-hinged door. Heavy-gauge, high-temperature Cantal AF alloy wire heating elements are powered through a low-voltage transformer to heat the workload.