No. 901 is a 1200ºF (649ºC) electrically-heated walk-in oven from Grieve, currently used for heat treating at the customer’s facility. Workspace dimensions of this oven measure 48" W x 60" D x 72" H. 120 kW are installed in Incoloy-sheathed tubular elements to heat the oven chamber, while a 12,500 CFM, 10-HP recirculating blower provides horizontal airflow to the workload.

Grieve’s high-temp walk-in oven features 10" thick insulated walls, comprising 2" of 1900ºF block and 8" of 10 lb/cf density rockwool; inner and outer door gaskets with the inner gasket sealing directly against the door plug, while the outer gasket seals against the front face of the oven; doors equipped with expansion joints on the inner face to guarantee uniform sealing at all temperatures; aluminized steel exterior; Type 304, 2B finish stainless steel interior; 7"insulated floor with truck wheel guide tracks and a 2,000 lb. capacity stainless steel shelf oven truck with shelf supports on 6" centers.

Controls on No. 901 include a 325 CFM stainless steel powered forced exhauster with motorized dampers for cooling, manual reset excess temperature controller with separate contactors, recirculating airflow safety switch, 10" diameter circular chart recorder, digital indicating and programming temperature controller and an SCR power controller.