The Grieve Corp.
No. 925 is a gas-heated, 2000F (1095C) pallet heat-treating furnace that has workspace dimensions of 30 in. wide x 48 in. deep x 36 in. high (760 mm x 1,219 mm x 915 mm). The furnace includes two modulating natural gas burners with a floor-mounted combustion air blower, a 325 cfm intake-pressurizing blower with motorized dampers on the intake and exhaust for accelerated cooling. It has 7-in. (~180 mm) thick insulating walls consisting of 5 in. (~130 mm) of 2300F (1260C) ceramic fiber and 2 in. (~50 mm) of 1700F (930C) ceramic fiber. The workload rests on a removable pallet with 7-in. thick insulation, consisting of 4.5-in. thick 2300F firebrick and 2.5-in. thick 2300F firebrick. The furnace includes all safety equipment, a 10-in. diameter circular recorder, digital programming temperature controller and recirculating blower airflow safety switch.