July 1, 2016

No. 866 is a 550° (288°C) belt conveyor oven from Grieve, currently used for heat treating coiled spring steel. Workspace dimensions of this oven measure 18″ wide x 20′ deep x 15″ high. 60 KW are installed in Nichrome wire heating elements to heat the oven, while a 4200 CFM, 3 HP recirculating blower provides vertical downward airflow to the workload.

The oven travel comprises an 1-1/2′ long open belt loading zone, 20′ long insulated heat zone with recirculated airflow, 1′ long open zone, plus a 12″ long cooling zone and an 1-1/2′ long open unloading zone.

This Grieve belt conveyor oven features 4″ insulated walls, aluminized steel exterior, and stainless steel interior. Two 12″ diameter tubeaxial fans, each driven by a 1/2-HP motor, push/pull air through cooling zone. A 12″ wide, 1/2″ x 1/2″ high carbon steel flat wire conveyor belt with 1/3-HP motor drive is variable from 16″ to 44″ per minute.