Conveyor Oven for Heat Treating Reaches 850°F

The No. 867 gas-heated belt conveyor oven from Grieve provides 850°F (454°C) for production heat treating. The oven’s workspace measures 36" × 216" × 15", and is heated at 800,000 BTU per hour by a natural gas burner. A 12,500-cfm, 10-hp stainless steel recirculating blower provides vertical downward airflow to the workload.

The oven’s conveyed travel comprises a 3-ft.-long, open-belt loading zone; an 18-ft. (216")-long insulated heat zone with recirculated airflow; a 3-ft.-long, open-belt unloading zone; and a 30"-wide, Type 304 stainless steel woven-wire conveyor belt. The belt features 3" flex-plate edges and is driven by a 0.5-hp V-belt drive with speeds variable from 1 to 19 ipm.  

The oven features 7"-thick insulated walls, an aluminized steel exterior and interior, exhaust hoods over each end equipped with a 12"-diameter, 0.5-hp tube axial fan, and all safety equipment required by IRI, FM and NFPA Standard 86 for gas-heated equipment, including a 650-cfm, 0.5-hp forced exhauster. Controls on the No. 867 include a digital indicating temperature controller and 10"-diameter circular chart recorder.