The Grieve Corp.
No. 925 is a gas-heated, 2000F pallet furnace used for heat treating. Workspace dimensions measure 30 in. wide x 48 in. deep x 36 in. high and 700,000 Btu/h power installed in two modulated natural gas burners with a floor-mounted combustion air blower. It also includes a 325-cfm intake pressurizing blower, with motorized dampers on the intake and exhaust for accelerated cooling. The furnace has 7-in. thick insulated walls, comprising 5 in. of 2300F ceramic fiber and 2 in. of 1700F ceramic fiber. The workload rests on a removable pallet with 7-in. thick insulation, comprising 4.5-in. thick 2300F firebrick and 2.5-in. thick 2300F firebrick. The furnace includes all safety equipment, as well as a 10-in. diameter circular chart recorder, digital programming temperature controller and recirculating blower airflow safety switch.