No. 852 is an 850°F (454°C), high-temperature walk-in oven from Grieve, used for heat treating and baking varnish at the customer's facility. Workspace dimensions of this oven measure 60" x 96" x 72"; 120 KW are installed in Incoloy-sheathed tubular heating elements, while a 7,800 CFM, 5-HP recirculating blower provides combination airflow to the workload.
This Grieve oven has 8-inch insulated walls and a 4-inch insulated floor. Additional features include an aluminized steel interior and exterior and safety equipment for handling flammable solvents, including explosion-venting door hardware.
Controls on the No. 852 include a digital-indicating temperature controller and manual reset excess temperature controller with separate contactors.
No. 925 is a gas-heated, 2,000°F pallet furnace used for heat-treating. Workspace dimensions measure 30" x 48" x 36"; 700,000 BTU/HR are installed in two modulating natural gas burners with a floor-mounted combustion air blower. This unit also includes a 325 CFM intake-pressurizing blower with motorized dampers on the intake and exhaust for accelerated cooling.
This Grieve pallet furnace has 7-inch thick insulated walls, comprising 5 inches of 2,300°F ceramic fiber and 2 inches of 1,700°F ceramic fiber. The workload rests on a removable pallet with 7-inch thick insulation, comprising 4.5-inch thick 2,300°F firebrick and 2.5-inch thick 2,300°F firebrick.
Built to JIC/NEMA 12 electrical standards, No. 925 includes all safety equipment required by IRI, FM, and NFPA Standard 86 for gas-heated equipment. In addition, the furnace includes a 10-inch diameter circular chart recorder, digital programming temperature controller, and recirculating blower airflow safety switch.